Corchorusolitoriuswaste(mulukiya) as a potential sorbent for the removal of cadmium (II) andthorium (IV) ions: kinetics, equilibrium study and image analysis
This work was conducted to determine the practicability of using a new adsorbent Corchorusolitorius(mulukiya)waste,for the removal of cadmium (Cd(II)), and thorium (Th(IV)) from wastewater. Corchorusolitoriuswereanalysis by Fourier transform infraredFTIR , scanning electron microscopy (SEM) and energy dispersive X-ray Spectroscopy (EDEX). Some parameters such as adsorbent dosage, solution pH’s, initial metal ion concentrations, and contact time, that influence adsorption phenomenon, were studied. The optimum pH for maximum adsorption of Cd(II) and Th(IV) was found to be 5.55 and 4.50, respectively. The contact time required for reaching equilibrium was 2 hr. The pseudo second-order kinetic model was the best fit to represent the kinetic data. Analysis of the equilibrium adsorption data using Langmuir and Freundlich models showed that theLangmuir model was well suitable to describe the metal ions adsorption.
Use of iron oxide magnetic nanosorbents for Cr (VI) removal from aqueous solu...IJERA Editor
This review paper focuses on the use of iron oxide nanosorbents for the removal of hexavalent Chromium [Cr(VI)], from aqueous media. Cr(VI) is a well-known toxic heavy metal, which can cause severe damages to the human health even with the presence of trace levels. Chromium continuously enters into water streams from different sources. Several methods are available for Cr(VI) removal and some of them are well established in industrial scale whilst some are still in laboratory scale. Reduction followed by chemical precipitation, adsorption, electro-kinetic remediation, membrane separation processes and bioremediation are some of the removal techniques. Each method is associated with both advantages and disadvantages. Currently, the use of nanosorbents for the aqueous chromium removal is popular among researchers and iron oxide nanoparticles are the most frequently used nanosorbents. This review paper summarizes the performance of different iron oxide nanosorbents studied on the last decade. The direct comparison of these results is difficult due to different experimental conditions used in each study. Adsorption isotherms and adsorption kinetics models are also discussed in this review paper. The effect of solution pH, temperature, initial Cr(VI) concentration, adsorbent dosage and other coexisting ions are also briefly discussed. From the results it is evident that, more attention needs to be paid on the industrial application of the technologies which were successful in the laboratory scale.
Bioaccumulation of Cadmium Heavy Metal And its Effect on the Level of Chlorop...researchinventy
Cadmium is known to inhibit the biosynthesis of chlorophyll and can disrupt the photosynthesis process. This research aimed at investigating the ability of the accumulation of cadmium heavy metals (Cd) by Thalassia hemprichii in the waters of the Ambon Island and its effect on the levels of chlorophyll and carotenoid in the leaves. Cd heavy metal analysis was carried out on samples of sea water, sediments, as well as the roots and leaves of T. hemprichii using Atomic Absorption Spectrometer (AAS). The ability of accumulation and translocation of Cd heavy metals T. hemprichii was determined by calculating the Bioconcentration Factor (BCF) and translocation factor (TF). The analysis of chlorophyll and carotenoid content used UV-Vis Spectrophotometer. The results of the research showed that the BCF value of T. hemprichii reached 141.04, while the TF value was 7.63. The BCF and TF value which was more than one indicated that T. hemprichii had the potential to be metal accumulators. The effect of the levels of Cd heavy metals in the leaves and the level of chlorophyll showed a negative correlation, but not significant. The level of Cd heavy metals in the leaves also could increase the levels of carotenoids of the leaves of T. hemprichii. These results indicate that T. hemprichii had the potential as phytoremediator in the waters of Ambon island that have been contaminated with heavy metals Cd.
The Use Of Pistia stratiotes To Remove Some Heavy Metals From Romi Stream: A ...iosrjce
The study involved a laboratory experiment on the use of Pistia stratiotes in the removal of some
heavy metals from a stream polluted by waste water from Kaduna Refinery and Petrochemical Company. Water
sample was collected from Kaduna Refinery effluent point, Romi up and Romi down. The Bioconcentration
(BCF) and Biotranslocation (BTF) Factors of each metal were determined. The experinmental study showed
that Pistia stratiotes is a suitable candidate for effective removal of heavy metals (Hg, Cd, Mn, Ag, Pb, Zn) from
Romi stream.
Heavy Metals Level Evaluation in Lycopersicon Esculentum Tomato and Daucus Ca...ijtsrd
The exposure to heavy metals such as Ni, Cd, Cr, Co, Pb, As, Hg, Zn, Fe and Cu, has been reported as a risk to human health through the consumption of vegetable when exposed to air pollution and other environmental and agricultural pesticides. This paper is aimed to evaluate the level of heavy metal in carrot and tomatoes cultivated in two farming communities in Kazaure Local Government Area, Jigawa State, Nigeria. The heavy metals were analysed using Atomic Absorption Spectroscopy. The result showed that the mean levels concentration of heavy metals from carrot and tomatoes fruit cultivated from the two farming communities in Kazaure namely Gada and Firji farming areas. The heavy Ni, Cd, Fe, Pb, Mn, Zn and Cr concentration for carrots cultivated at Gada farming area were ranged from 0.06 0.09 mg kg, 0.08 0.09 mg kg, 8.24 8.91 mg kg,0.13 0.23 mg kg,1.23 ,1.56 1.67 mg kg and 0.02 0.04 mg kg respectively. The heavy metals As Cu and Co were not detected in the fruits of carrot for cultivated in both two farming areas. While the mean concentration obtained from tomatoes fruits from the Gada and Firji farming areas ranged from 0.14 0.16 mg kg, 0.06 0.07 mg kg, 6.11 6.12 mg kg, 0.97 0,99 mg kg, 1.11 1.23 mg kg, 0.35 0.39 mg kg for Ni, Cd, Fe, Mn, Zn and Cr respectively. While As, Cu, Pb and Co were not found in tomatoes harvested from the two farming communities. The study concludes that the level of some heavy metals analysed in carrot and tomatoes fruits were found within the permissible level except lead and cadmium. Ibrahim M. D | Abdulmumin Y | Abdulmumin T. M | Adamu A. U "Heavy Metals Level Evaluation in Lycopersicon Esculentum (Tomato) and Daucus Carota (Carrot) Cultivated In Two Farming Communities in Kazaure Local Government Area" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-3 , April 2020, URL: https://www.ijtsrd.com/papers/ijtsrd30269.pdf Paper Url :https://www.ijtsrd.com/biological-science/biochemistry/30269/heavy-metals-level-evaluation-in-lycopersicon-esculentum-tomato-and-daucus-carota-carrot-cultivated-in-two-farming-communities-in-kazaure-local-government-area/ibrahim-m-d
Biosorption of Copper (II) Ions by Eclipta Alba Leaf Powder from Aqueous Solu...ijtsrd
The removal of heavy metals from industrial wastewater is of great concern as heavy metals are non-biodegradable, toxic elements that cause serious health problems if disposed of in the surrounding environment. The present study, Karisalangkani (Eclipta Alba) leaves were used for the adsorption of heavy metals like copper (Cu (II)) ions. The bio sorbent was characterized using SEM and BET analysis. The bio sorption experiments are conducted through batch system. The operating parameters studied were initial metal ion concentration, adsorbent dosage, initial solution pH, contact time and effect of temperature Adsorption equilibrium is achieved in 30 min and the adsorption kinetics of Cu (II) is found to follow a pseudo-second-order kinetic model. Equilibrium data for Cu (II) adsorption are fitted well by Langmuir isotherm model. The maximum adsorption capacity for Cu (II) ions is estimated to be 9.2 mgg at 25 °C. The experimental result shows that the materials have good potential to remove heavy metals from effluent and good potential as an alternate low cost adsorbent. Due to their outstanding adsorption capacities, Eclipta Alba is excellent sorbents for the removal of copper (II) ions. B. Kavitha | R. Arunadevi"Biosorption of Copper (II) Ions by Eclipta Alba Leaf Powder from Aqueous Solutions" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-5 , August 2018, URL: http://www.ijtsrd.com/papers/ijtsrd17156.pdf http://www.ijtsrd.com/chemistry/environmental-chemistry/17156/biosorption-of-copper-ii-ions-by-eclipta-alba-leaf-powder-from-aqueous-solutions/b-kavitha
Use of iron oxide magnetic nanosorbents for Cr (VI) removal from aqueous solu...IJERA Editor
This review paper focuses on the use of iron oxide nanosorbents for the removal of hexavalent Chromium [Cr(VI)], from aqueous media. Cr(VI) is a well-known toxic heavy metal, which can cause severe damages to the human health even with the presence of trace levels. Chromium continuously enters into water streams from different sources. Several methods are available for Cr(VI) removal and some of them are well established in industrial scale whilst some are still in laboratory scale. Reduction followed by chemical precipitation, adsorption, electro-kinetic remediation, membrane separation processes and bioremediation are some of the removal techniques. Each method is associated with both advantages and disadvantages. Currently, the use of nanosorbents for the aqueous chromium removal is popular among researchers and iron oxide nanoparticles are the most frequently used nanosorbents. This review paper summarizes the performance of different iron oxide nanosorbents studied on the last decade. The direct comparison of these results is difficult due to different experimental conditions used in each study. Adsorption isotherms and adsorption kinetics models are also discussed in this review paper. The effect of solution pH, temperature, initial Cr(VI) concentration, adsorbent dosage and other coexisting ions are also briefly discussed. From the results it is evident that, more attention needs to be paid on the industrial application of the technologies which were successful in the laboratory scale.
Bioaccumulation of Cadmium Heavy Metal And its Effect on the Level of Chlorop...researchinventy
Cadmium is known to inhibit the biosynthesis of chlorophyll and can disrupt the photosynthesis process. This research aimed at investigating the ability of the accumulation of cadmium heavy metals (Cd) by Thalassia hemprichii in the waters of the Ambon Island and its effect on the levels of chlorophyll and carotenoid in the leaves. Cd heavy metal analysis was carried out on samples of sea water, sediments, as well as the roots and leaves of T. hemprichii using Atomic Absorption Spectrometer (AAS). The ability of accumulation and translocation of Cd heavy metals T. hemprichii was determined by calculating the Bioconcentration Factor (BCF) and translocation factor (TF). The analysis of chlorophyll and carotenoid content used UV-Vis Spectrophotometer. The results of the research showed that the BCF value of T. hemprichii reached 141.04, while the TF value was 7.63. The BCF and TF value which was more than one indicated that T. hemprichii had the potential to be metal accumulators. The effect of the levels of Cd heavy metals in the leaves and the level of chlorophyll showed a negative correlation, but not significant. The level of Cd heavy metals in the leaves also could increase the levels of carotenoids of the leaves of T. hemprichii. These results indicate that T. hemprichii had the potential as phytoremediator in the waters of Ambon island that have been contaminated with heavy metals Cd.
The Use Of Pistia stratiotes To Remove Some Heavy Metals From Romi Stream: A ...iosrjce
The study involved a laboratory experiment on the use of Pistia stratiotes in the removal of some
heavy metals from a stream polluted by waste water from Kaduna Refinery and Petrochemical Company. Water
sample was collected from Kaduna Refinery effluent point, Romi up and Romi down. The Bioconcentration
(BCF) and Biotranslocation (BTF) Factors of each metal were determined. The experinmental study showed
that Pistia stratiotes is a suitable candidate for effective removal of heavy metals (Hg, Cd, Mn, Ag, Pb, Zn) from
Romi stream.
Heavy Metals Level Evaluation in Lycopersicon Esculentum Tomato and Daucus Ca...ijtsrd
The exposure to heavy metals such as Ni, Cd, Cr, Co, Pb, As, Hg, Zn, Fe and Cu, has been reported as a risk to human health through the consumption of vegetable when exposed to air pollution and other environmental and agricultural pesticides. This paper is aimed to evaluate the level of heavy metal in carrot and tomatoes cultivated in two farming communities in Kazaure Local Government Area, Jigawa State, Nigeria. The heavy metals were analysed using Atomic Absorption Spectroscopy. The result showed that the mean levels concentration of heavy metals from carrot and tomatoes fruit cultivated from the two farming communities in Kazaure namely Gada and Firji farming areas. The heavy Ni, Cd, Fe, Pb, Mn, Zn and Cr concentration for carrots cultivated at Gada farming area were ranged from 0.06 0.09 mg kg, 0.08 0.09 mg kg, 8.24 8.91 mg kg,0.13 0.23 mg kg,1.23 ,1.56 1.67 mg kg and 0.02 0.04 mg kg respectively. The heavy metals As Cu and Co were not detected in the fruits of carrot for cultivated in both two farming areas. While the mean concentration obtained from tomatoes fruits from the Gada and Firji farming areas ranged from 0.14 0.16 mg kg, 0.06 0.07 mg kg, 6.11 6.12 mg kg, 0.97 0,99 mg kg, 1.11 1.23 mg kg, 0.35 0.39 mg kg for Ni, Cd, Fe, Mn, Zn and Cr respectively. While As, Cu, Pb and Co were not found in tomatoes harvested from the two farming communities. The study concludes that the level of some heavy metals analysed in carrot and tomatoes fruits were found within the permissible level except lead and cadmium. Ibrahim M. D | Abdulmumin Y | Abdulmumin T. M | Adamu A. U "Heavy Metals Level Evaluation in Lycopersicon Esculentum (Tomato) and Daucus Carota (Carrot) Cultivated In Two Farming Communities in Kazaure Local Government Area" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-3 , April 2020, URL: https://www.ijtsrd.com/papers/ijtsrd30269.pdf Paper Url :https://www.ijtsrd.com/biological-science/biochemistry/30269/heavy-metals-level-evaluation-in-lycopersicon-esculentum-tomato-and-daucus-carota-carrot-cultivated-in-two-farming-communities-in-kazaure-local-government-area/ibrahim-m-d
Biosorption of Copper (II) Ions by Eclipta Alba Leaf Powder from Aqueous Solu...ijtsrd
The removal of heavy metals from industrial wastewater is of great concern as heavy metals are non-biodegradable, toxic elements that cause serious health problems if disposed of in the surrounding environment. The present study, Karisalangkani (Eclipta Alba) leaves were used for the adsorption of heavy metals like copper (Cu (II)) ions. The bio sorbent was characterized using SEM and BET analysis. The bio sorption experiments are conducted through batch system. The operating parameters studied were initial metal ion concentration, adsorbent dosage, initial solution pH, contact time and effect of temperature Adsorption equilibrium is achieved in 30 min and the adsorption kinetics of Cu (II) is found to follow a pseudo-second-order kinetic model. Equilibrium data for Cu (II) adsorption are fitted well by Langmuir isotherm model. The maximum adsorption capacity for Cu (II) ions is estimated to be 9.2 mgg at 25 °C. The experimental result shows that the materials have good potential to remove heavy metals from effluent and good potential as an alternate low cost adsorbent. Due to their outstanding adsorption capacities, Eclipta Alba is excellent sorbents for the removal of copper (II) ions. B. Kavitha | R. Arunadevi"Biosorption of Copper (II) Ions by Eclipta Alba Leaf Powder from Aqueous Solutions" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-5 , August 2018, URL: http://www.ijtsrd.com/papers/ijtsrd17156.pdf http://www.ijtsrd.com/chemistry/environmental-chemistry/17156/biosorption-of-copper-ii-ions-by-eclipta-alba-leaf-powder-from-aqueous-solutions/b-kavitha
KINETIC STUDY OF CHROMIUM (III) – PVP COMPLEX BY USING RADIO-TRACER TECHNIQUEcscpconf
Complexes of metal ions with organic ligands play an important role in many fields of our life.These metal complexes are widely used in medical diagnosis and therapeutic analysis. These
complexes are very familiar with radioisotopes exerting precise chemical and physical properties. Generally, chromium is considered as toxic and essential element depending on its
oxidation state in the biological system. Here the dynamic dissociation constants of the complex of Chromium (III) with excellent biocompatible polymer PVP (poly-N-vinylpyrolidone) have been determined. The dissociation constants will give us the idea about the stability of the said complexes. As PVP is a good ligand with different metals within a wide range of pH. Ingestion techniques of radioisotopes to the biological systems may be nicely polished with the knowledge of this kinetic study with chromium. Green methods have been carried out during the whole period of the experiments to maintain the environmental friendly aspects.
Removal of heavy metals (Cr, Cd, Ni and Pb) using fresh water algae (Utricula...Innspub Net
A study was conducted to check the efficiency of different fresh water algae for removing heavy metals (Cr, Cd, Ni and Pb) from contaminated water. The three most abundant indigenous algal species namely Ulothrix tenuissima, Oscillatoria tenuis and Zygogonium ericetorum were collected from fresh water channels of Parachinar, Pakistan and brought to the laboratory of Soil and Environmental Sciences Department at the University of Agriculture, Peshawar Pakistan for proper identification. To check the efficiency for removing heavy metals artificial contaminated water was prepared and was inoculated with mix culture of above mentioned algae and incubated for 10 days. After incubation algal species were removed from water through centrifugation and was dried, digested and analyzed for heavy metals. The results showed that the concentration of all heavy metals was substantially reduced in the algal inoculated contaminated water. The analysis of algal biomass showed that considerable amount of metals and other elements were recovered in algae. Among the tested algal species, Zygogonium ericetorum showed maximum removal Ni(99.40ug) and Cr(66.84ug) from contaminated water followed by Oscillatoria tenuis with 84ug(Ni) and 64.83ug(Cr) respectively. However Oscillatoria tenuis showed maximum removal of Cd(41.00ug) than the other algal species. Similarly Zygogonium ericetorum showed maximum removal of Pb (451ug) followed by Ulothrix tenuissima where 441ug was recorded. Highest amount Cd, and Ni were recovered in Zygogonium ericetorum biomass while highest amount of Cr and Pb were recorded in the biomass of Oscillatoria tenuis. Finally it could be concluded that algae have efficiently removed heavy metals from contaminated water. Further research is needed to test other algal species for removal of heavy metal and other elements from the contaminated water.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Removal of Lead Ion Using Maize Cob as a BioadsorbentIJERA Editor
The intensification of industrial activity and environmental stress greatly contributes to the significant rise of
heavy metal pollution in water resources making threats on terrestrial and aquatic life. The toxicity of metal
pollution is slow and interminable, as these metal ions are non bio-degradable. The most appropriate solution for
controlling the biogeochemistry of metal contaminants is sorption technique, to produce high quality treated
effluents from polluted wastewater. Maize cob readily available was used as sorbent for the removal of lead ions
from aqueous media. Adsorption studies were performed by batch experiments as a function of process
parameters such as sorption 500ppm,2.5g, 400minutes, 400 rpm and 5 PH. Concentration, Dosage, time, rpm,
and pH. I have found that the optimized parameters are Freundlich model fits best with the experimental
equilibrium data among the three tested adsorption isotherm models. The kinetic data correlated well with the
Lagergren first order kinetic model for the adsorption studies of lead using maize cob. It was concluded that
adsorbent prepared from maize cob as to be a favorable adsorbent and easily available to remove the heavy
metal lead (II) is 95 % and can be used for the treatment of heavy metals in wastewater.
Formation of chlorinated breakdown products during degradation of sunscreen a...Maciej Przybyłek
In this study, a new degradation path of sunscreen active ingredient, 2-ethylhexyl-4-methoxycinnamate (EHMC) and 4-methoxycinnamic acid (MCA) in the presence of sodium hypochlorite (NaOCl), was discussed. The reaction products were detected using gas chromatography-mass spectrometry (GC-MS). Since HOCl treatment leads to more polar products than EHMC, application of polar extracting agents, dichloromethane and ethyl acetate/n-hexane mixture, gave better results in terms of chlorinated breakdown products identification than n-hexane. Reaction of EHMC with HOCl lead to the formation of C=C bridge cleavage products such as 2-ethylhexyl chloroacetate, 1-chloro-4-methoxybenzene, 1,3-dichloro-2-methoxybenzene, and 3-chloro-4-methoxybenzaldehyde. High reactivity of C=C bond attached to benzene ring is also characteristic for MCA, since it can be converted in the presence of HOCl to 2,4-dichlorophenole, 2,6-dichloro-1,4-benzoquinone, 1,3-dichloro-2-methoxybenzene, 1,2,4-trichloro-3-methoxybenzene, 2,4,6-trichlorophenole, and 3,5-dichloro-2-hydroxyacetophenone. Surprisingly, in case of EHMC/HOCl/UV, much less breakdown products were formed compared to non-UV radiation treatment. In order to describe the nature of EHMC and MCA degradation, local reactivity analysis based on the density functional theory (DFT) was performed. Fukui function values showed that electrophilic attack of HOCl to the C=C bridge in EHMC and MCA is highly favorable (even more preferable than phenyl ring chlorination). This suggests that HOCl electrophilic addition is probably the initial step of EHMC degradation.
Performance of Fluidized Bed Biofilm Reactor for Nitrate RemovalIJRES Journal
Nitrate is present in the majority of water resources, and has reached serious level in many parts of the world, which is responsible for environmental problems. Hence it is necessary to remove nitrate. Biological denitrification provides the most economical means for nitrate removal. This paper represents the performance of Fluidized Bed Biofilm Reactor (FBBR) using bone china fine granules as biofilm carrier media for biological denitrification.
In this experimental work, the maximum average nitrogen removal efficiency of 93.71% at HRT of 30 minutes and optimum efficiency of 88.13% at HRT of 10 minutes is observed. For nitrogen loading rates varying from 0.48 to 28.80 kg N m-3 d-1, denitrification rates observed are 0.44 kg N m-3 d-1 to 17.26 kg N m-3 d-1. Optimum nitrogen loading rate and denitrification rate observed are 10.08 kg N m-3 d-1 and 8.88 kg N m-3 d-1 respectively. The results justify the usefulness of FBBR for denitrification.
DANGER OF HEXAVALENT CHROMIUM AND STRATEGY FOR THE REMEDITATIONcscpconf
Some metals as micronutrients have a major role in the life and growth process of plants and animals. However, certain forms of some metals may also act as toxic material even in relatively small quantities. Chromium is such a metal, whose oncentration above a certain limit may cause a serious problem to the health of living organisms. Chromium (Cr) may occur
in several chemical forms in organic and inorganic systems. In biological systems only Cr (III) and Cr (VI) are significant. Among these two states, trivalent chromium (Cr-III) is considered as an essential component, while hexavalent hromium (Cr-VI) in biological system has been
detected as responsible for so many diseases, even some specific forms of cancer. This paper intends to present the adverse effect of Cr(VI) on environment as well as on human beings and also try to find a way out to dissolve the problem by a newly developed efficient and cost effective technique.
Multiple adsorption of heavy metal ions in aqueous solution using activated c...eSAT Journals
Abstract
Batch adsorption of different heavy metal ions (Nickel, Copper, Zinc, Lead, Cadmium and Chromium) in aqueous solution using
activated carbon from Nigerian bamboo was studied. The bamboo was cut, washed and dried. It was carbonized between 3000C -
4500C, and activated at 8000C using nitric acid. The bulk density, iodine number, Benzene adsorption, methylene adsorption, and
ash content of the activated carbon produced compared well with commercial carbons. Multiple adsorption of these metals in
same aqueous solution using bamboo carbon showed that adsorption capacity is in the order Pb>Cd>Cu>Zn>Ni>Cr which
showed that these metal ions can be adsorbed selectively by Nigerian bamboo activated carbon. The order of adsorption is related
to the maximum adsorption of lead, cadmium, copper on bamboo was found to be in the order of ionic radius of the heavy metals
used. Therefore this study demonstrates that bamboo can serve as a good source of activated carbon with multiple metal ions –
removing potentials and may serve as a better replacement for commercial activated carbons in applications that warrant their
use. However, it will also contribute to the search for less expensive adsorbents and their utilization possibilities for the
elimination of heavy metal ions from industrial waste water.
Key Words: multiple adsorption, heavy metals, Nigerian bamboo, Activated Carbon,
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
degradation of pollution and photocatalysisPraveen Vaidya
The presentation deals with the use of conduction of photocatalytic reaction using the transition metal doped transparent semiconducting thinfilms. The precursor to film is prepared by the SILAR method, which is a chemical method.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
A Review on Removal and Recovery of Phosphorus and Nitrogen from Domestic Was...paperpublications3
Abstract:Struvite crystallization is a promising method to remove and recover phosphorus from wastewater to ease both the scarcity of phosphorus rock resources and water eutrophication worldwide. Wastewater treatment plants, especially those employing secondary treatment and anaerobic sludge digestion, have historically encountered phosphate precipitates, most commonly being Struvite. The growth of uncontrolled Struvite increases pumping and maintenance cost, as well as reduces the overall capacity of the plant piping system. Since domestic wastewater is recognized as nutrient rich water, the recovery of nutrients using a crystallization technique may provide value added product called Struvite, which is a slow releasing fertilizer. Struvite precipitation occurs in an equimolecular concentration of Mg2+, NH4+ and PO43- at slightly alkaline conditions. Addition of a source of Mg is essential to maintain the favorable condition of PO4 and Mg.
Isotherm Modeling and Thermodynamic Study of the Adsorption of Toxic Metal by...CrimsonpublishersEAES
Isotherm Modeling and Thermodynamic Study of the Adsorption of Toxic Metal by the Apricot Stone by Moussa Abbas*, Tounsia Aksil and Mohamed Trari in Environmental Analysis & Ecology Studies
Heavy Metals Contamination Levels In Suya Meat Marketed In Selected Towns In ...iosrjce
IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT) multidisciplinary peer-reviewed Journal with reputable academics and experts as board member. IOSR-JESTFT is designed for the prompt publication of peer-reviewed articles in all areas of subject. The journal articles will be accessed freely online.
Filtering Unwanted Messages from Online Social Networks (OSN) using Rule Base...IOSR Journals
Online Social Networks (OSNs) are today one of the most popular interactive medium to share,
communicate, and distribute a significant amount of human life information. In OSNs, information filtering can
also be used for a different, more responsive, function. This is owing to the fact that in OSNs there is the
possibility of posting or commenting other posts on particular public/private regions, called in general walls.
Information filtering can therefore be used to give users the ability to automatically control the messages
written on their own walls, by filtering out unwanted messages. OSNs provide very little support to prevent
unwanted messages on user walls. For instance, Facebook permits users to state who is allowed to insert
messages in their walls (i.e., friends, defined groups of friends or friends of friends). Though, no content-based
partialities are preserved and therefore it is not possible to prevent undesired communications, for instance
political or offensive ones, no matter of the user who posts them. To propose and experimentally evaluate an
automated system, called Filtered Wall (FW), able to filter unwanted messages from OSN user walls
KINETIC STUDY OF CHROMIUM (III) – PVP COMPLEX BY USING RADIO-TRACER TECHNIQUEcscpconf
Complexes of metal ions with organic ligands play an important role in many fields of our life.These metal complexes are widely used in medical diagnosis and therapeutic analysis. These
complexes are very familiar with radioisotopes exerting precise chemical and physical properties. Generally, chromium is considered as toxic and essential element depending on its
oxidation state in the biological system. Here the dynamic dissociation constants of the complex of Chromium (III) with excellent biocompatible polymer PVP (poly-N-vinylpyrolidone) have been determined. The dissociation constants will give us the idea about the stability of the said complexes. As PVP is a good ligand with different metals within a wide range of pH. Ingestion techniques of radioisotopes to the biological systems may be nicely polished with the knowledge of this kinetic study with chromium. Green methods have been carried out during the whole period of the experiments to maintain the environmental friendly aspects.
Removal of heavy metals (Cr, Cd, Ni and Pb) using fresh water algae (Utricula...Innspub Net
A study was conducted to check the efficiency of different fresh water algae for removing heavy metals (Cr, Cd, Ni and Pb) from contaminated water. The three most abundant indigenous algal species namely Ulothrix tenuissima, Oscillatoria tenuis and Zygogonium ericetorum were collected from fresh water channels of Parachinar, Pakistan and brought to the laboratory of Soil and Environmental Sciences Department at the University of Agriculture, Peshawar Pakistan for proper identification. To check the efficiency for removing heavy metals artificial contaminated water was prepared and was inoculated with mix culture of above mentioned algae and incubated for 10 days. After incubation algal species were removed from water through centrifugation and was dried, digested and analyzed for heavy metals. The results showed that the concentration of all heavy metals was substantially reduced in the algal inoculated contaminated water. The analysis of algal biomass showed that considerable amount of metals and other elements were recovered in algae. Among the tested algal species, Zygogonium ericetorum showed maximum removal Ni(99.40ug) and Cr(66.84ug) from contaminated water followed by Oscillatoria tenuis with 84ug(Ni) and 64.83ug(Cr) respectively. However Oscillatoria tenuis showed maximum removal of Cd(41.00ug) than the other algal species. Similarly Zygogonium ericetorum showed maximum removal of Pb (451ug) followed by Ulothrix tenuissima where 441ug was recorded. Highest amount Cd, and Ni were recovered in Zygogonium ericetorum biomass while highest amount of Cr and Pb were recorded in the biomass of Oscillatoria tenuis. Finally it could be concluded that algae have efficiently removed heavy metals from contaminated water. Further research is needed to test other algal species for removal of heavy metal and other elements from the contaminated water.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Removal of Lead Ion Using Maize Cob as a BioadsorbentIJERA Editor
The intensification of industrial activity and environmental stress greatly contributes to the significant rise of
heavy metal pollution in water resources making threats on terrestrial and aquatic life. The toxicity of metal
pollution is slow and interminable, as these metal ions are non bio-degradable. The most appropriate solution for
controlling the biogeochemistry of metal contaminants is sorption technique, to produce high quality treated
effluents from polluted wastewater. Maize cob readily available was used as sorbent for the removal of lead ions
from aqueous media. Adsorption studies were performed by batch experiments as a function of process
parameters such as sorption 500ppm,2.5g, 400minutes, 400 rpm and 5 PH. Concentration, Dosage, time, rpm,
and pH. I have found that the optimized parameters are Freundlich model fits best with the experimental
equilibrium data among the three tested adsorption isotherm models. The kinetic data correlated well with the
Lagergren first order kinetic model for the adsorption studies of lead using maize cob. It was concluded that
adsorbent prepared from maize cob as to be a favorable adsorbent and easily available to remove the heavy
metal lead (II) is 95 % and can be used for the treatment of heavy metals in wastewater.
Formation of chlorinated breakdown products during degradation of sunscreen a...Maciej Przybyłek
In this study, a new degradation path of sunscreen active ingredient, 2-ethylhexyl-4-methoxycinnamate (EHMC) and 4-methoxycinnamic acid (MCA) in the presence of sodium hypochlorite (NaOCl), was discussed. The reaction products were detected using gas chromatography-mass spectrometry (GC-MS). Since HOCl treatment leads to more polar products than EHMC, application of polar extracting agents, dichloromethane and ethyl acetate/n-hexane mixture, gave better results in terms of chlorinated breakdown products identification than n-hexane. Reaction of EHMC with HOCl lead to the formation of C=C bridge cleavage products such as 2-ethylhexyl chloroacetate, 1-chloro-4-methoxybenzene, 1,3-dichloro-2-methoxybenzene, and 3-chloro-4-methoxybenzaldehyde. High reactivity of C=C bond attached to benzene ring is also characteristic for MCA, since it can be converted in the presence of HOCl to 2,4-dichlorophenole, 2,6-dichloro-1,4-benzoquinone, 1,3-dichloro-2-methoxybenzene, 1,2,4-trichloro-3-methoxybenzene, 2,4,6-trichlorophenole, and 3,5-dichloro-2-hydroxyacetophenone. Surprisingly, in case of EHMC/HOCl/UV, much less breakdown products were formed compared to non-UV radiation treatment. In order to describe the nature of EHMC and MCA degradation, local reactivity analysis based on the density functional theory (DFT) was performed. Fukui function values showed that electrophilic attack of HOCl to the C=C bridge in EHMC and MCA is highly favorable (even more preferable than phenyl ring chlorination). This suggests that HOCl electrophilic addition is probably the initial step of EHMC degradation.
Performance of Fluidized Bed Biofilm Reactor for Nitrate RemovalIJRES Journal
Nitrate is present in the majority of water resources, and has reached serious level in many parts of the world, which is responsible for environmental problems. Hence it is necessary to remove nitrate. Biological denitrification provides the most economical means for nitrate removal. This paper represents the performance of Fluidized Bed Biofilm Reactor (FBBR) using bone china fine granules as biofilm carrier media for biological denitrification.
In this experimental work, the maximum average nitrogen removal efficiency of 93.71% at HRT of 30 minutes and optimum efficiency of 88.13% at HRT of 10 minutes is observed. For nitrogen loading rates varying from 0.48 to 28.80 kg N m-3 d-1, denitrification rates observed are 0.44 kg N m-3 d-1 to 17.26 kg N m-3 d-1. Optimum nitrogen loading rate and denitrification rate observed are 10.08 kg N m-3 d-1 and 8.88 kg N m-3 d-1 respectively. The results justify the usefulness of FBBR for denitrification.
DANGER OF HEXAVALENT CHROMIUM AND STRATEGY FOR THE REMEDITATIONcscpconf
Some metals as micronutrients have a major role in the life and growth process of plants and animals. However, certain forms of some metals may also act as toxic material even in relatively small quantities. Chromium is such a metal, whose oncentration above a certain limit may cause a serious problem to the health of living organisms. Chromium (Cr) may occur
in several chemical forms in organic and inorganic systems. In biological systems only Cr (III) and Cr (VI) are significant. Among these two states, trivalent chromium (Cr-III) is considered as an essential component, while hexavalent hromium (Cr-VI) in biological system has been
detected as responsible for so many diseases, even some specific forms of cancer. This paper intends to present the adverse effect of Cr(VI) on environment as well as on human beings and also try to find a way out to dissolve the problem by a newly developed efficient and cost effective technique.
Multiple adsorption of heavy metal ions in aqueous solution using activated c...eSAT Journals
Abstract
Batch adsorption of different heavy metal ions (Nickel, Copper, Zinc, Lead, Cadmium and Chromium) in aqueous solution using
activated carbon from Nigerian bamboo was studied. The bamboo was cut, washed and dried. It was carbonized between 3000C -
4500C, and activated at 8000C using nitric acid. The bulk density, iodine number, Benzene adsorption, methylene adsorption, and
ash content of the activated carbon produced compared well with commercial carbons. Multiple adsorption of these metals in
same aqueous solution using bamboo carbon showed that adsorption capacity is in the order Pb>Cd>Cu>Zn>Ni>Cr which
showed that these metal ions can be adsorbed selectively by Nigerian bamboo activated carbon. The order of adsorption is related
to the maximum adsorption of lead, cadmium, copper on bamboo was found to be in the order of ionic radius of the heavy metals
used. Therefore this study demonstrates that bamboo can serve as a good source of activated carbon with multiple metal ions –
removing potentials and may serve as a better replacement for commercial activated carbons in applications that warrant their
use. However, it will also contribute to the search for less expensive adsorbents and their utilization possibilities for the
elimination of heavy metal ions from industrial waste water.
Key Words: multiple adsorption, heavy metals, Nigerian bamboo, Activated Carbon,
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
degradation of pollution and photocatalysisPraveen Vaidya
The presentation deals with the use of conduction of photocatalytic reaction using the transition metal doped transparent semiconducting thinfilms. The precursor to film is prepared by the SILAR method, which is a chemical method.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
A Review on Removal and Recovery of Phosphorus and Nitrogen from Domestic Was...paperpublications3
Abstract:Struvite crystallization is a promising method to remove and recover phosphorus from wastewater to ease both the scarcity of phosphorus rock resources and water eutrophication worldwide. Wastewater treatment plants, especially those employing secondary treatment and anaerobic sludge digestion, have historically encountered phosphate precipitates, most commonly being Struvite. The growth of uncontrolled Struvite increases pumping and maintenance cost, as well as reduces the overall capacity of the plant piping system. Since domestic wastewater is recognized as nutrient rich water, the recovery of nutrients using a crystallization technique may provide value added product called Struvite, which is a slow releasing fertilizer. Struvite precipitation occurs in an equimolecular concentration of Mg2+, NH4+ and PO43- at slightly alkaline conditions. Addition of a source of Mg is essential to maintain the favorable condition of PO4 and Mg.
Isotherm Modeling and Thermodynamic Study of the Adsorption of Toxic Metal by...CrimsonpublishersEAES
Isotherm Modeling and Thermodynamic Study of the Adsorption of Toxic Metal by the Apricot Stone by Moussa Abbas*, Tounsia Aksil and Mohamed Trari in Environmental Analysis & Ecology Studies
Heavy Metals Contamination Levels In Suya Meat Marketed In Selected Towns In ...iosrjce
IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT) multidisciplinary peer-reviewed Journal with reputable academics and experts as board member. IOSR-JESTFT is designed for the prompt publication of peer-reviewed articles in all areas of subject. The journal articles will be accessed freely online.
Filtering Unwanted Messages from Online Social Networks (OSN) using Rule Base...IOSR Journals
Online Social Networks (OSNs) are today one of the most popular interactive medium to share,
communicate, and distribute a significant amount of human life information. In OSNs, information filtering can
also be used for a different, more responsive, function. This is owing to the fact that in OSNs there is the
possibility of posting or commenting other posts on particular public/private regions, called in general walls.
Information filtering can therefore be used to give users the ability to automatically control the messages
written on their own walls, by filtering out unwanted messages. OSNs provide very little support to prevent
unwanted messages on user walls. For instance, Facebook permits users to state who is allowed to insert
messages in their walls (i.e., friends, defined groups of friends or friends of friends). Though, no content-based
partialities are preserved and therefore it is not possible to prevent undesired communications, for instance
political or offensive ones, no matter of the user who posts them. To propose and experimentally evaluate an
automated system, called Filtered Wall (FW), able to filter unwanted messages from OSN user walls
Fluorescence technique involves the optical detection and spectral analysis of light emitted by a substance undergoing a transition from an excited electronic state to a lower electronic state. The aim of this study is to assess the -amino levulinic acid (-ALA) uptake. Based on image processing technique, Matlab was used to analyze the fluorescence images resulted from activation of (-ALA) and follow its uptake along one week. Analyzing the RGB colours pixel profile from obtained results showed different profiles for malignant tissues, normal tissues, treated just after PDT and finally at one week post PDT. The treated tissues fluorescence profile showed changes from closer to malignant tissue profile till been closed to normal one.
The Protective Role Of High Dietary Protein On Arsenic Induced Hepatotoxicity...IOSR Journals
The objective of the present investigation was to study the protective role of High dietary protein on arsenic induced hepatotoxicity model in adult male albino rats. Hepatotoxicity in rats was caused by arsenic tri oxide at a dose of 3mg- /ml/kg body weight. Hepamerz, a drug used as standard hepatoprotective agent, was administered orally as standard hepatoprotective agent for 14 consecutive days prior to arsenic treatment at a dose of 10mg- /ml/kg body weight. This drug has many side effects. These side effects have prompted the scientific world for the search of alternative natural remedies of liver damage. The High dietary protein was administered orally to rats along with arsenic. The biochemical parameters were investigated. The results indicated that biochemical changes produced by arsenic were restored to almost normal by High protein diet. The High protein diet produced hepatoprotective effect through the modulation of antioxidant - mediated mechanism by altering serum glutamate oxaloacetate transaminase (SGOT), serum glutamate pyruvate transaminase (SGPT), alkaline phosphatase (ALP), superoxide dismutase (SOD) and catalase (CAT) activities and reduced glutathione (GSH) and lipid peroxidation (LPO) levels - against arsenic induced hepatotoxicity model in rats.
Mathematical Modelling: A Comparatively Mathematical Study Model Base between...IOSR Journals
In this paper, we have studied on the topic of „Corruption‟. Also, I will try to find or study the effect of corruption on the Development of the country or any country of the world. Therefore, how find the solution of the problem of corruption will be destroyed completely from the society. We have observed that the Development of the country depends upon Corruption. That is, when the Corruption increases, Development decreases automatically of any country of the world. Therefore, I will try to find the formula on the problem of „Relation between the Corruption and Development of any field or any country of the world‟. Also, I have to highlight the concept of „Application of Mathematical modeling in the interesting problem “corruption” in every field of our country or world .Also, Applied Mathematics focuses on the formulation and study of Mathematical Models .Thus the activity of Applied Mathematics is vitally connected with Research in Pure Mathematics. So I will try to study on it and find, what is corruption and quantity of corruption and also find the growth of corruption and how it will decay? Now we convert this areal world problem to mathematics problem and find some formulae on it such as Mathematical Corruption Growth formula, Mathematical Constant corruption level formula and Mathematical decay of corruption formula.
Perishable Inventory Model Having Weibull Lifetime and Time Dependent DemandIOSR Journals
In this paper we develop and analyse an inventory model for deteriorating items with Weibull rate of decay and time dependent demand. Using the differential equations, the instantaneous state of inventory at time‘t’, the amount of deterioration etc. are derived. With suitable cost considerations the total cost function and profit rate function are also obtained by maximizing the profit rate function, the optimal ordering and pricing policies of the model are derived. The sensitivity of the model with respect to the parameters is discussed through numerical illustration. It is observed that the deteriorating parameters have a tremendous influence on the optimal selling price and ordering quantity.
Analysis of Multimedia Traffic Performance in a Multi-Class traffic environme...IOSR Journals
Abstract: The computer networks have evolved themselves into an altogether new generation with Mobile Ad-Hoc networks. The Mobile Ad-Hoc Networks are increasingly becoming more sophisticated and complex in terms of topology, routing and security[1][2][3]The new age MANETs incorporate routing of heavier traffic classes like audio, video and multimedia. It has become important to study the performance characteristics of the multimedia traffic class in MANETS [10] that includes packet loss rate and throughput. In this paper we will discuss these performance parameter throughput under different scenarios like varying Bandwidth, channel error rate, delay and fragment size. Keywords: MANET, Packet loss rate, Throughput, Bandwidth, Fragment size
Evaluation Of Indian Companies Act 1956- Is It Capable Enough To Accelerate T...IOSR Journals
This study is to highlight the hassles being struggled by the industry in view of the compliance requirement focusing theimpact of the requirement of prior approval from the Central Govt. under Section 297 of the Indian Companies Act 1956. The impact of the said section on the industrial development is evaluated in this study based on the core issue of opportunity cost involved in this regard.
Chebyshev Collocation Approach for a Continuous Formulation of Implicit Hybri...IOSR Journals
In this paper, an implicit one-step method for numerical solution of second order Initial Value
Problems of Ordinary Differential Equations has been developed by collocation and interpolation technique.
The one-step method was developed using Chebyshev polynomial as basis function and, the method was
augmented by the introduction of offstep points in order to bring about zero stability and upgrade the order of
consistency of the new method. An advantage of the derived continuous scheme is that it can produce several
outputs of solution at the off-grid points without requiring additional interpolation. Numerical examples are
presented to portray the applicability and the efficiency of the method.
Old wine in new wineskins: Revisiting counselling in traditional Ndebele and ...IOSR Journals
The institution of counselling is present in all human communities as people share their sorrows,
mentor, empower and advise each other. The service of advising and grooming is all that counselling is. This
paper seeks to explore the institution of counselling in Shona and Ndebele traditional societies before the advent
of western formalised counselling institutions. The research sets to prove that counselling is not a new
phenomenon in these societies, that is a remnant of colonialism but rather it is an old institution that has been
window dressed with western strategies and formalisms. African traditional counselling strategies as seen in the
Shona and Ndebele examples emphasise more on the preventive forms of counselling than crisis counselling.
Advice and mentoring are prioritised in these societies as a way of helping people stay out of trouble that in
future will require therapeutic or crisis counselling. Modern day counselling has been professionalised and
commercialised and requires people to pay for it yet in Shona and Ndebele traditional societies it was part of
one’s responsibility to make sure others are well advised and counselled if they are emotionally troubled.
Professional counselling in marriage, carrier guidance, teenage grooming for example is not a new practice but
an old practice done differently like old wine in new wineskins.
Similar to Corchorusolitoriuswaste(mulukiya) as a potential sorbent for the removal of cadmium (II) andthorium (IV) ions: kinetics, equilibrium study and image analysis
The Use Of Ecchornia crassipes To Remove Some Heavy Metals From Romi Stream: ...iosrjce
The study involved a laboratory experiment on the use of Ecchornia crassipes in the removal of
some heavy metals from a stream polluted by waste water from Kaduna Refinery and Petrochemical Company.
Water sample was collected from Kaduna Refinery effluent point, Romi up and Romi down. The
Bioconcentration (BCF) and Biotranslocation (BTF) Factors of each metal were determined. The experinmental
study showed that Ecchornia crassipes is a suitable candidate for effective removal of heavy metals (Hg, Cd,
Mn, Ag, Pb, Zn) from Romi stream.
DOI 10.1002tqem.21536R E S E A R C H A R T I C L EExDustiBuckner14
DOI: 10.1002/tqem.21536
R E S E A R C H A R T I C L E
Experimental investigation of adsorption capacity of anthill
in the removal of heavy metals from aqueous solution
Adeyinka Sikiru Yusuff Idowu Iyabo Olateju
Department of Chemical and Petroleum Engi-
neering, College of Engineering, Afe Babalola
University, Ado-Ekiti, Nigeria
Correspondence
Adeyinka Sikiru Yusuff, Department of Chemical
and Petroleum Engineering, College of Engineer-
ing, Afe Babalola University, Ado-Ekiti P.M.B.
5454, Nigeria.
Email: [email protected]
Abstract
In the present work, the adsorption capacity of anthill was investigated as a low-cost adsorbent
to remove the heavy metal ions, lead (II) ion (Pb2+), and zinc (II) ion (Zn2+) from an aqueous solu-
tion. The equilibrium adsorption isotherms of the heavy metal ions were investigated under batch
process. For the study we examined the effect of the solution's pH and the initial cations con-
centrations on the adsorption process under a fixed contact time and temperature. The anthill
sample was characterized using a scanning electron microscope (SEM), X-ray fluorescence (XRF),
and Fourier transform infrared (FTIR) techniques. From the SEM analysis, structural change in the
adsorbent was a result of heavy metals adsorption. Based on the XRF analysis, the main compo-
sition of the anthill sample was silica (SiO2 ), alumina (Al2 O3 ), and zirconia (ZrO2 ). The change in
the peaks of the spectra before and after adsorption indicated that there was active participation
of surface functional groups during the adsorption process. The experimental data obtained were
analyzed using 2- and 3-parameter isotherm models. The isotherm data fitted very well to the 3-
parameter Radke–Prausnitz model. It was noted that Pb2+ and Zn2+ can be effectively removed
from aqueous solution using anthill as an adsorbent.
K E Y W O R D S
adsorption, anthill, characterization, equilibrium isotherm, heavy metal
1 I N T R O D U C T I O N
Indiscriminate disposal of wastewater containing heavy metals has
received considerable attention in recent years, primarily due to the
fact that their presence in waste stream can be readily adsorbed by
aquatic organisms and make them directly enter the human food chain,
thus posing a serious health risk to consumers (Lin, MacLean, & Zeng,
2000). Because of the ability of heavy metals to accumulate in living
tissues and because they cause damage to these tissues over time,
heavy metals are classified as carcinogens. For example, exposure to
lead ions can cause anemia, kidney damage, and even untimely death
(Mohammed-Ridha, Ahmed, & Raoof, 2017), while zinc ions at elevated
concentration result in pancreas damage, osteoporosis, and even death
(Wahi, Ngaini, & Jok, 2009). Water or wastewater containing heavy
metals requires effective treatment techniques that can completely
remove these toxic metals (Yusuff, 2017).
A number of treatment techniques for the removal of heavy
me ...
Tannin gel derived from Leaves of Ricinus Communis as an adsorbent for the Re...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
Adsorption kinetics of Copper, Lead and Zinc by Cow Dung, Poultry Manure and ...AJSERJournal
This study highlights the effect of cow dung, cocoa pod and poultry manure in the removal of heavy
metals from solution and their applicability to Langmuir and Freundlich models was studied in the Soil Science
Laboratory of Michael Okpara University of Agriculture, Umudike in Abia State, Ngeria. The amendments used in the
study were locally sourced, sundried, ground and sieved with 2mm sieve. The salts of the three heavy metals were
separately used to prepare heavy metal solutions of 100 mg/L. Batch study was carried out at room temperature on a
mechanical shaker using 120 ml plastic bottles at different time intervals of 15, 30 and 60minutes. After shaking, the
amendments and heavy metal solutions were separated using whatman No 1 filter paper, stored in the refrigerator and
analyzed for heavy metals concentration. The amount of heavy metals adsorbed was calculated. The results revealed
that high adsorption occur at low equilibrium concentrations in all the amendments with decreasing levels of
adsorption with increasing equilibrium with cow dung and cocoa pod having higher adsorption capacity than poultry
manure. Coefficient of determination (R2) showed that the experimental data fit in to both Langmuir and Freundlich
models. For reduced heavy metal uptake by plants and subsequent contamination of the food chain, cow dung, cocoa
pod and poultry manure should be used as amendments in heavy metal contaminated soils
Adsorption kinetics of Copper, Lead and Zinc by Cow Dung, Poultry Manure and ...AJSERJournal
This study highlights the effect of cow dung, cocoa pod and poultry manure in the removal of heavy
metals from solution and their applicability to Langmuir and Freundlich models was studied in the Soil Science
Laboratory of Michael Okpara University of Agriculture, Umudike in Abia State, Ngeria. The amendments used in the
study were locally sourced, sundried, ground and sieved with 2mm sieve. The salts of the three heavy metals were
separately used to prepare heavy metal solutions of 100 mg/L. Batch study was carried out at room temperature on a
mechanical shaker using 120 ml plastic bottles at different time intervals of 15, 30 and 60minutes. After shaking, the
amendments and heavy metal solutions were separated using whatman No 1 filter paper, stored in the refrigerator and
analyzed for heavy metals concentration. The amount of heavy metals adsorbed was calculated. The results revealed
that high adsorption occur at low equilibrium concentrations in all the amendments with decreasing levels of
adsorption with increasing equilibrium with cow dung and cocoa pod having higher adsorption capacity than poultry
manure. Coefficient of determination (R2) showed that the experimental data fit in to both Langmuir and Freundlich
models. For reduced heavy metal uptake by plants and subsequent contamination of the food chain, cow dung, cocoa
pod and poultry manure should be used as amendments in heavy metal contaminated soils
Kinetic, thermodynamic and equilibrium studies on removal of hexavalent chrom...Ratnakaram Venkata Nadh
Removal of Cr(VI) by biosorption on two agro waste materials, casuarinas fruit powder (CFP) and sorghum
stem powder (SSP), has been investigated. The prepared adsorbent materials were characterized by SEM, EDX,
FTIR and BET. These biomaterials effectively removed Cr(VI) with a maximum removal of 93.35% and 63.75% using
15 gL−1 and 5 gL−1 of CFP and SSP, respectively, at 60 oC with 20mgL−1 initial Cr(VI) concentration in solution. In both
cases of adsorbents, kinetic data of adsorption fitted well in pseudo-second-order in terms of correlation coefficient
(R2). This helps in proposing the process of adsorption as chemical coordination, which is correlated with the thermodynamic
study results conducted at different values of temperature. Langmuir, Freundlich and D-R models were evaluated
for description of metal sorption isotherms. Values of coefficients of intra-particle diffusion and mass transfer have
also been determined at different values of temperature.
Similar to Corchorusolitoriuswaste(mulukiya) as a potential sorbent for the removal of cadmium (II) andthorium (IV) ions: kinetics, equilibrium study and image analysis (20)
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
This presentation explores a brief idea about the structural and functional attributes of nucleotides, the structure and function of genetic materials along with the impact of UV rays and pH upon them.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
Comparing Evolved Extractive Text Summary Scores of Bidirectional Encoder Rep...University of Maribor
Slides from:
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Track: Artificial Intelligence
https://www.etran.rs/2024/en/home-english/
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
Slide 1: Title Slide
Extrachromosomal Inheritance
Slide 2: Introduction to Extrachromosomal Inheritance
Definition: Extrachromosomal inheritance refers to the transmission of genetic material that is not found within the nucleus.
Key Components: Involves genes located in mitochondria, chloroplasts, and plasmids.
Slide 3: Mitochondrial Inheritance
Mitochondria: Organelles responsible for energy production.
Mitochondrial DNA (mtDNA): Circular DNA molecule found in mitochondria.
Inheritance Pattern: Maternally inherited, meaning it is passed from mothers to all their offspring.
Diseases: Examples include Leber’s hereditary optic neuropathy (LHON) and mitochondrial myopathy.
Slide 4: Chloroplast Inheritance
Chloroplasts: Organelles responsible for photosynthesis in plants.
Chloroplast DNA (cpDNA): Circular DNA molecule found in chloroplasts.
Inheritance Pattern: Often maternally inherited in most plants, but can vary in some species.
Examples: Variegation in plants, where leaf color patterns are determined by chloroplast DNA.
Slide 5: Plasmid Inheritance
Plasmids: Small, circular DNA molecules found in bacteria and some eukaryotes.
Features: Can carry antibiotic resistance genes and can be transferred between cells through processes like conjugation.
Significance: Important in biotechnology for gene cloning and genetic engineering.
Slide 6: Mechanisms of Extrachromosomal Inheritance
Non-Mendelian Patterns: Do not follow Mendel’s laws of inheritance.
Cytoplasmic Segregation: During cell division, organelles like mitochondria and chloroplasts are randomly distributed to daughter cells.
Heteroplasmy: Presence of more than one type of organellar genome within a cell, leading to variation in expression.
Slide 7: Examples of Extrachromosomal Inheritance
Four O’clock Plant (Mirabilis jalapa): Shows variegated leaves due to different cpDNA in leaf cells.
Petite Mutants in Yeast: Result from mutations in mitochondrial DNA affecting respiration.
Slide 8: Importance of Extrachromosomal Inheritance
Evolution: Provides insight into the evolution of eukaryotic cells.
Medicine: Understanding mitochondrial inheritance helps in diagnosing and treating mitochondrial diseases.
Agriculture: Chloroplast inheritance can be used in plant breeding and genetic modification.
Slide 9: Recent Research and Advances
Gene Editing: Techniques like CRISPR-Cas9 are being used to edit mitochondrial and chloroplast DNA.
Therapies: Development of mitochondrial replacement therapy (MRT) for preventing mitochondrial diseases.
Slide 10: Conclusion
Summary: Extrachromosomal inheritance involves the transmission of genetic material outside the nucleus and plays a crucial role in genetics, medicine, and biotechnology.
Future Directions: Continued research and technological advancements hold promise for new treatments and applications.
Slide 11: Questions and Discussion
Invite Audience: Open the floor for any questions or further discussion on the topic.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
This pdf is about the Schizophrenia.
For more details visit on YouTube; @SELF-EXPLANATORY;
https://www.youtube.com/channel/UCAiarMZDNhe1A3Rnpr_WkzA/videos
Thanks...!
Corchorusolitoriuswaste(mulukiya) as a potential sorbent for the removal of cadmium (II) andthorium (IV) ions: kinetics, equilibrium study and image analysis
1. IOSR Journal of Applied Chemistry (IOSR-JAC)
e-ISSN: 2278-5736.Volume 6, Issue 5 (Jan. 2014), PP 41-50
www.iosrjournals.org
www.iosrjournals.org 41 | Page
Corchorusolitoriuswaste(mulukiya) as a potential sorbent for the
removal of cadmium (II) andthorium (IV) ions: kinetics,
equilibrium study and image analysis
A. A. EMAM
1
Chemistry Department, Faculty of Science, Al-Azhar University (Girls), Nasr City, Cairo, Egypt
Abstract: This work was conducted to determine the practicability of using a new adsorbent
Corchorusolitorius(mulukiya)waste,for the removal of cadmium (Cd(II)), and thorium (Th(IV)) from
wastewater. Corchorusolitoriuswereanalysis by Fourier transform infraredFTIR , scanning electron
microscopy (SEM) and energy dispersive X-ray Spectroscopy (EDEX). Some parameters such as adsorbent
dosage, solution pH’s, initial metal ion concentrations, and contact time, that influence adsorption
phenomenon, were studied. The optimum pH for maximum adsorption of Cd(II) and Th(IV) was found to be
5.55 and 4.50, respectively. The contact time required for reaching equilibrium was 2 hr. The pseudo second-
order kinetic model was the best fit to represent the kinetic data. Analysis of the equilibrium adsorption data
using Langmuir and Freundlich models showed that theLangmuir model was well suitable to describe the metal
ions adsorption.
Keywords:Corchorusolitoriuswaste; Cadmium(II); Thorium(IV); Adsorption.
I. Introduction
The discharge of radioactive waste into the environment is a major issue. A radioactive material, is an
environmental pollutant, being present in mining industry wastewater. Other sources include mainly soils and
seawater (Rao et al., 2006).Thorium is abundantly available radioactive element in earth’s crust in association
with rare earths and uranium. The main sources of thorium are monazite, rutile and thorianite. It occurs in the
tetravalent form in its compounds in nature. Also occurs naturally in ocean. The recent attention to extract
thorium from waste streams is due to its application as a good fertile nuclear fuel for breeder reactors. It is
extensively used in variable areas, such as optics, radio, aeronautics and aerospace, metallurgy and chemical
industry, nuclear industry and material fields (Zhang et al., 2005).The existence of thorium in the nature and its
potential use in the nuclear technology were not considered with sufficient importance because of the geological
availability of natural resources of thorium and uranium. Thorium is an important component of the fuel in
nuclear breeder reactors and thorium fuel cycle can be used in most of the reactors already operated (Raje and
Reddy, 2010; Unak, 2000). On the verge of energy crisis, world has been utilizing maximum of its nuclear
energy resources by extracting radioactive metals like uranium, thorium etc. Nuclear waste at a thorium-based
reactor is minimal, and the plutonium from the process is used for further generation (Unak, 2000). Since
thorium ions are radioactive, they emit electromagnetic radiations that can give permanent damage to cells and
ultimately resulting to cancer.
Heavy metals are often detected in industrial wastewaters, which originate from metal plating, mining
activities, smelting, battery manufacture, tanneries, petroleum refining, paint manufacture, pesticides, pigment
manufacture, printing and photographic industries, etc. (Kadirvelu et al,2001, Williams et al,1998). Presence of
metal ions is of specialconcern as they can accumulate in different components of the environment; represent a
serious threat to human populations, the fauna, etc. Cd(II) is one of the most toxic metals. The cadmium has
been well recognized for its negative effect on the environment where it is non-degradable and accumulates
readily in living systems.Adverse health effects due to cadmium are well documented and it has been reported
to cause renal disturbances, lung insufficiency, bone lesions, cancer and hypertension in humans ( Parker,
1980).
A number of technologies for removing cadmium and thorium ions from wastewaterhave been
developed. The most important of these techniques include chemicalprecipitation, solvent extraction,
adsorption, ion-exchange, and reverse osmosis. Adsorption is a relatively simple, cheap and effective method
for wastewater treatment.Different adsorbents have been reported in the literature for the removal of U(VI) and
Th(IV) ions, such as cellulose triacetate (Villalobos-Rodr´ıguez et al., 2012), magnetic chitosan composite
(Hritcu et al., 2012) and sepiolites (Kilislioglu and Aras, 2010).
A special attention has been focused on the use of natural adsorbents as an alternative to replace the
conventional adsorbents, based on both the environmental and the economical points of view (Bable, 2003).
Natural materials that are available in large quantities, or certain waste products from industrial or agricultural
2. Corchorusolitoriuswaste (mulukiya) as a potential sorbent for the removal of cadmium (II) and
www.iosrjournals.org 42 | Page
operations, may have potential as inexpensive sorbents. Due to their low cost, when these materials the end of
their lifetime, they can be disposed of without expensive regeneration. The abundance and availability of
agricultural by-products make them good sources of raw materials for natural sorbents.
Corchorusolitorius Linn is an important fiber crop cultivated in the Gangetic plane of West Bengal,
India and Egypt. Jute plants produce edible leaves that are used as a vegetable and food constituent common to
the people. It is made into a slimy soup or sauce in some of West African cooking traditions. Furthermore, it is
also a popular dish in the northern provinces of the Philippines, also known as saluyot(Oboh et al., 2012).
The objective of the present work was to study the adsorption characteristics of cadmium (Cd(II)), and
thorium (Th(IV)) ions from aqueous solution using Corchorusolitorius (mulukiya). The Langmuir
andFreundlich and models were used to describe equilibrium isotherms.The kinetic data were fitted by models
including pseudo-first-order and pseudo-second-order.
II. Materials and methods
2.1 Materials
All chemicals and reagents needed in the present study were of analytical grade and purchased from
Merck. Solutions of Cadmium and thorium were prepared from Cd(NO3)2·5H2O and Th(NO3)2·5H2Oby
dissolving appropriate amounts of salts in double distilled water. The stock solution was diluted with distilled
water to obtain the desired concentration.
Corchorusolitorius (Fig.1) were collected from Elsharkiacity( Egypt). The raw materials (stems of
Corchorusolitorius) were washed thoroughly with deionized water, and dried at 100 ◦C, crushed and sieved to
particles with size range of 40–60 mesh for use as adsorbent
.
Fig. 1– Photo of Corchorusolitoriusleaves.
.
The Corchorusolitorius belongs to the class of condensed tannins which are the polymerized products
of flavan-3-ols and/or flavan-3,4-diols and are the polyphenols with molecular weight of 500–3000 Da (Pizzi,
1993). The branch-chained tetraflavonoid structures of Corchorusolitorius have reactive and accessible
nucleophilic centers in the rings (Fig. 2)(Aparna.,et al (2013).
OOH
OH
OOH
OH
OH
OH
OH
OH
O
OH
OH
OH
OH
OH
O
OH
OH
OH OH
OH
OH
OH
OH
Fig. 2.Branch-chained tetraflavonoid structure of Corchorusolitoriusunit.
2.2Analysis
The FT-IR spectra of the samplewere taken using a Shimadzu FT-IR spectrophotometer between 4000
and 500 cm−1
with KBr background. The Corchorusolitoriuswas done using Thermo Finnigan Flash EA IIIZ
CHNS analyzer.
3. Corchorusolitoriuswaste (mulukiya) as a potential sorbent for the removal of cadmium (II) and
www.iosrjournals.org 43 | Page
Thesurface morphology of Corchorusolitorius and Cd(II) and Th(IV)adsorbed onto Corchorusolitorius
samples examined using (JEOL SEM – 25) scanning electron microscope. Prior to examination, the samples
were dried under sputter coated gold.
The energy dispersive X-ray (EDEX )pattern of Corchorusolitorius and Cd(II) and Th(IV)adsorbed
onto Corchorusolitoriususing Oxfordenergy dispersive X-ray spectroscopy.
2.3Adsorption experiments
Glass-stoppered Erlenmeyer flasks were used for adsorption experiments. Batch mode adsorption
studies were conducted to study the effects of dose, equilibrium time, initial metal ion concentrations, and pH.
All experiments were carried out at 25°C. A known amount of adsorbentwas continuously shaken in 50 mL of
the corresponding salt solutions. Shaking was kept at 300 r/min for 2hr to reach equilibrium. After attaining the
equilibrium, the adsorbent was removed by filtration and the concentrations of Cd(II) and Th(IV) ions in the
corresponding filtrate were determined.
2.4Metal analysis
The concentration of Cd(II) and Th(IV) ions was determined by AAS method. The difference in
concentrations was taken as the amount adsorbed by Corchorusolitorius. An atomic adsorption spectrometer
(Solaar M6, USA), with lead hallow cathode lamp and air acetylene flame.
The amount of metal ions adsorbed at equilibrium, qe (mg/g), was obtained by Eq. (1):
=
( )
(1)
where, C0 (mg/L), Ce (mg/L) are the initial and equilibrium concentrations of the metal ion respectively, V (L)is
the volume of solution, and m (g) is the mass of the adsorbent. Each experiment was carried out in duplicate and
the average value is reported.
Solution pH was measured with a pH Meter (model μ-362). All the solutions,for the adsorption
equilibrium studies, were shaken at 25°C controlled by water bath shaker purchased from Labline, India.
III. Results and discussion
3.1 Characterization of adsorbent:
3.1.1 Energy dispersive X-ray (EDEX )analysis
The elucidation of Cd(II) and Th(IV) adsorption on the Corchorusolitorius were done by energy
dispersive X-ray (EDEX) analysis. (EDEX) spectrum of Corchorusolitorius before and after interaction with
metal ions is shownFig.3(a) (b) and (c).The spectrum of adsorbent presented in Figure 3(a )and Table (1) show
that the major elements present. The EDX spectrumfor Corchorusolitoriusparticles indicated the presence of
some element in the Table (1) but did not show the characteristic signal of Cd(II) and Th(IV) ions on the
surface .The interaction between Corchorusolitorius with Cd(II) and Th(IV) are depicted in Fig.3 (b) and (c).
An additional signal comparedwith the control onesFig.3 (a) observed in EDEX
profile(b) and (c)suggesting the interactionof metal with functional groups present in adsorbent. The EDX
spectrum gives the characteristic peaks for Cd(II) and Th(IV).This confirms the binding of the metal ions to the
Corchorusolitorius surface. The spectra reflectedTh(IV)with a high adsorption than Cd(II).
Fig. 3. EDEX Spectra of (a) Corchorusolitorius (b) Cd (II)-Corchorusolitorius (c) Th (IV)
Corchorusolitorius.
(a) (b) (c)
4. Corchorusolitoriuswaste (mulukiya) as a potential sorbent for the removal of cadmium (II) and
www.iosrjournals.org 44 | Page
Table1. Weight % of (a) Corchorusolitorius (b) Corchorusolitorius with Cd(II) (c) Corchorusolitorius
with Th(IV).
3.1.2 Scanning electron microscopic(SEM) analysis
The scanning electron micrographs (SEM) of Corchorusolitoriusbefore and after adsorptionCd(II) and
Th(IV) are shown in (Fig. 4(a),(b) and (c)).The surface morphology revealed that a significant change inthe
surface topography of Corchorusolitorius after metal adsorption. The surfaceof raw Corchorusolitorius was
smooth with multicellular nature, whereasrough surface morphology with fragments and groove like
structureswas observed due to adsorbed of Cd(II) and Th(IV).Moreover, it was also observedthat the natural
green color of Corchorusolitorius had become dark green after adsorption.
Fig. 4. SEM images of (a) Corchorusolitorius (b) Cd(II)-Corchorusolitorius (c) Th(IV)
Corchorusolitorius.
3.1.3 Fourier transform infrared (FTIR) spectroscopy
Fig.5(a),(b) and (c)) presents the FT-IR spectra of Corchorusolitorius,Cd(II)-Corchorusolitoriusand
Th(IV)- Corchorusolitorius respectively. The FTIR spectra of a,b,c, showed a broad band in the region of 3700–
3010 cm−1
, which is due to the characteristic −OH stretching for phenolic or alcoholic group. The smaller peak
at 2927 cm−1
is associated with the −CH stretchingof the aromatic rings andmethylene(−CH2−) bridges. The
peak at 1611 cm−1
corresponds to the characteristic elongation of aromatic−C=C− bonds.The deformation
vibration of −C−C− bonds in the phenolic group absorbs in the region of 1510–1400 cm−1
. The peak at 1454
cm−1
may be assigned to bending. The signal at 1345 cm−1
is associated with the −OH deformation vibration for
phenolicor alcoholic group. The absorption peak at around 1232 cm−1
is associated with the −CO stretching of
aromatic ring. The ant symmetric −C−O−C− stretching contributes for the peak at 1159 cm−1
. The bands in
therange of 843–665 cm−1
are attributed to the deformation vibrationsof the C−H bond in the aromatic rings
(Sanchez-MartGnaGonzalez-Velasco, Beltran-Heredia, Gragera-Carvajal, &Salguero-Fernandez, 2010).The
peak at 898 cm−1
forβ-glucosidic linkage of cellulose in Corchorusolitorius.It was also observed that new peak
at 556 cm−1
due to adsorbed of Cd(II) and Th(IV) onto Corchorusolitorius (Fig. 5(b) and (c)).
Corchorusolitorius Cd-Corchorusolitorius Th-Corchorusolitorius
Element Weight% Element Weight% Element Weight%
C
N
Na
Mg
Al
Si
P
S
Cl
K
22.73
1.45
0.08
0.19
0.05
0.10
0.23
0.37
0.18
0.39
C
Na
Mg
Al
Si
P
S
Cl
K
Ca
20.64
0.22
0.39
0.17
3.36
0.15
0.28
0.17
1.06
1.18
C
Na
Mg
Si
P
S
Cl
K
Ca
Cr
19.07
0.20
1.26
0.28
0.62
0.23
0.20
3.75
7.22
0.09
Ca
Cr
Fe
Cu
Au
O
Totals
0.80
0.05
0.08
5.53
0.07
67.69
100.00
Cr
Fe
Cu
Cd
Au
O
Totals
0.06
0.40
8.28
0.59
0.10
62.94
100.00
Fe
Co
Cu
Br
Au
Th
O
Totals
0.37
0.24
6.75
0.24
0.04
0.60
58.83
100.00
5. Corchorusolitoriuswaste (mulukiya) as a potential sorbent for the removal of cadmium (II) and
www.iosrjournals.org 45 | Page
Fig. 5. FTIR spectra of(a) Corchorusolitorius (b) Cd(II)-Corchorusolitorius (c) Th(IV)
Corchorusolitorius.
3.2 Effect of pH
The pH level is one of the important parameters for the adsorption of metal ions from an aqueous
solution. The pH of the solution will affect the surface charge of the adsorbent and the degree of ionization. The
effect of pH on the adsorption of Cd(II) and Th(IV) onto Corchorusolitorius at different initial concentrations
(30.0,50.0,70.0 and100.0 mg/L) at 250
C is depicted in Fig. 6.It can be seen that the adsorption percentages are
very low at strong acidicmedium. The minimal adsorption at low pH may be due to the higher concentration
and high mobility of H+
, which are preferentially adsorbed rather than metal ions (Ajmal et al.,2000,Annadurai
et al.,2002).Increasing the pH ofthe solution, the lower number of H+
(results in more metal
ionsadsorption.Adsorption of increased sharply with increase of pH up to optimum pH 5.55 and 4.50 for
Cd(II)and Th(IV) respectively then started decreasing. Therefore, all the following experiments were performed
at these optimum pH .The higher dsorptionTh(IV) at pH 4.50 could be associated with the predominance of
[Th2(OH)2
]6+
and other polymerized species possessing a better bindingaffinity (Tsezos and Volesky, 1982).
Adsorption was limited above pH 6.0 due to the formation of neutral Th(OH)4.
Cd(II)
pH
0 2 4 6 8 10
Removal(%)
0
20
40
60
80
100
30 mg/L
50 mg/L
70 mg/L
100 mg/L
Th(IV)
pH
0 2 4 6 8 10
Removal(%)
0
20
40
60
80
100
30 mg/L
50 mg/L
70 mglL
100 mg/L
Fig. 6Effect of pH on the adsorption of Cd(II) and Th(IV) onto Corchorusolitorius. Conditions: adsorbent dose
0.01 g/L; equilibrium time 4 hr; temperature250
C.
3.3 Effect of adsorbent dose
The effect of adsorbent dose on the removal of Cd(II) andTh(IV) ions was studied by carrying out the
adsorptionexperiments using various amounts of Corchorusolitoriusat the optimum pH 5.55 for Cd(II) and 4.5
for Th(IV) at 250
Cwith varying initial metal ion concentration of Cd(II) and Th(IV) 30,50,70 and100 mg/L
Th(IV) (Fig. 7). The time needed to attain equilibrium was taken as 4 hr. The removal percentage of Cd(II)
andTh(IV) ions was noted as a function of adsorbent dose. Theremoval of metal ion increasedwith an increase
of dose from0.005 to 0.03 g/L.This can be due to the fact that, the active sites could be effectively utilized when
the dosage was low. Asadsorbent dosage was increased, the number of unoccupiedeffective sites and the surface
area also increased and thusit improved the percentage of adsorption.
4000 3500 3000 2500 2000 1500 1000 500
0
40
80
%Transmittance
Wavenumber (cm
-1
)
0
40
80
(c)
(b)
0
40
80
(a)
6. Corchorusolitoriuswaste (mulukiya) as a potential sorbent for the removal of cadmium (II) and
www.iosrjournals.org 46 | Page
Cd(II)
Adsorbent Dose (g/L)
0.000 0.005 0.010 0.015 0.020 0.025 0.030 0.035
Removal(%)
65
70
75
80
85
90
95
100
30 mg/L
50 mg/L
70 mg/L
100mg/L
Th(IV)
Adsorbent Dose (g/L)
0.000 0.005 0.010 0.015 0.020 0.025 0.030 0.035
Removal(%)
60
65
70
75
80
85
90
95
100
30 mg/L
50 mg/L
70 mg/L
100 mg/L
Fig.7Effect of adsorbent dose on the adsorption of Cd(II) and Th(IV)onto Corchorusolitorius. Conditions:
equilibrium time 2 hr; concentrations; 30, 50.70, and 100 mg/L; pH 5.0 for Cd(II); pH 4.5 for Th(IV).
3.4 Effect of contact time and initial concentration
In order to establish an appropriate contact time between the adsorbent and metallic ions in solution,
the adsorption of Cd(II) and Th(IV) onto Corchorusolitoriuswas tested as a function of contact time at different
initial concentrations (30 to 100mg/L) of metal ion solutions . Fig. 8illistrated thatthe rate of adsorption for
Cd(VI) and Th(IV) was initiallyfast and then reached a plateau value. The high adsorption rate was due to the
abundance of active binding sites on the adsorbent, and as these sites get saturated, only a reduced amount of
adsorption was occurred (da Costa and Leite, 1991).The equilibrium time was found to be a constant and was
independent of the initial Cd(II) and Th(IV) ion concentrations.
The quantity of Cd(II)and Th(IV)ionsadsorbed at equilibrium onto Corchorusolitoriuswas found to be
improved from 26.5 and 31.09 mg/g to 70.42 and 73.2 mg/g, respectively, on increasing the initial concentration
from 30 to 100 mg/L indicating that the metal removalwas concentration dependent. The increase of metal ion
concentration accelerated the diffusion of metal ion from the bulk solution onto the adsorbent phase because of
the enhanced force of the higher concentration (Hameed et al., 2008). If metal ion/adsorbent ratios are low,
metal adsorption takes place at higher energy sites. When the metal ion/adsorbent ratio is increased, the higher
energy sites become saturated and lower energy sites are involved in adsorption and consequently the
adsorption efficiencyis decreased (Bhattacharya et al., 2006). Since the amount of metal ions adsorbed did not
change after 2 hr, the succeeding adsorption experiments were done keeping 2hr as an appropriate equilibrium
time.
Cd(II)
Time (min)
0 50 100 150 200
Amountadsorbed(mg/g)
0
5
10
15
20
25
30
30 mg/L
50 mg/L
70 mg/L
100 mg/L
Th (IV)
Time(min)
0 50 100 150 200
Amountadsorbed(mg/g)
0
20
40
60
80
100
30 mg/L
50 mg/L
70 mg/L
100 mg/L
Fig. 8 Adsorption kinetics at different initial Cd(II) and Th(IV) concentrations (30–100 mg/L). Conditions:
adsorbent dose 0.01 g/L; pH 4.5 for Th(IV);pH 5.0 for Cd(II); temperature 250
C.
3.5 Adsorption kinetics
Studies on the adsorption rate showed that the removal decreased with increased Cd(II) and Th (IV)
concentrationFig. 8. The metal removal mechanism is related to the initial metal ion concentration. Adsorption
of metal ions takes place at definite sites only when the metal ion concentration is low, but as the concentration
is increased, the sites become saturated and exchange sites are filled (Patel et al., 2007).The maximum amount
of Cd(II) and Th(IV) ions was adsorbed within the first 30 min (80–90% of total metal ions adsorbed) and
7. Corchorusolitoriuswaste (mulukiya) as a potential sorbent for the removal of cadmium (II) and
www.iosrjournals.org 47 | Page
thereafter the adsorption proceeded at a slower rate until equilibrium reached. The equilibrium time was found
to be at 120 min for the initial concentration range studied. This might be attributed to extremely slow diffusion
of the metal ions from the surface film into the microspores which are the least accessible sites for adsorption
(Warhurst et al., 1997).
The kinetics of adsorption describes the rate of metal ions uptake onto the Corchorusolitorius and this
rate control the equilibrium time. The kinetics of adsorbate uptake is required for selecting optimum operating
conditions for the full-scale batch process, so these models are important inwater treatment process design. The
kinetic parameter, whichis helpful for the prediction of adsorption rate, gives important information for
designing and modeling the process. Thus, the effects of contact time at different concentration were analyzed
from the kinetic point of view.
Adsorption kinetics are generally controlled by different mechanism, of which the most limiting are
the diffusion mechanisms, including the initial curved portion, attributed to rapid external diffusion or boundary
layer diffusion andsurface adsorption, and the linear portion, a gradual adsorption stage due to the intraparticle
diffusion, followed by aplateau to the equilibrium where the intraparticle diffusion starts to decrease due to the
low concentration in solution phase as well as fewer available adsorption sites (Guibaletal., 2003). Previously
several researchers used different kinetic models, such as Lagergren’s pseudo first order, pseudo second order,
Elovich kinetic equation, and parabolic diffusion model, to represent the mechanism of the adsorption process
(Hoda et al., 2006; Sarkar et al., 2006;Weber and Morris, 1963).
TheLagergren’s pseudo first order and pseudo-second-order model has been widelyused for adsorption
systems due to its good representation of the experimental data for most of the adsorbent–adsorbatesystems (Ho
and McKay, 1999). The pseudo-second- order equation has the following advantages: it does not have the
problem of assigning an effective adsorption capacity, the adsorption capacity, rate constant of pseudo-second
order and the initial adsorption rate all can be determined from the equation without knowing any parameter
beforehand.
The linear form of pseudo first order model can be expressedas:
log( - ) = log - t (2)
whereqe and qt (mg g−1
) are the adsorption capacities at equilibrium andattime t respectively
k1 at different concentration evaluated experimentally, were calculated using the slope and intercept of
plots of log(qe −qt) versus t, Table 2. Best fit lines at each concentration yielded relatively high R2
values.
The pseudo second-order rate expression, which has been applied for analyzing sorption kinetics from
liquid solutions, is linearly expressed as
= + t(3)
where k2 is the rate constant for pseudo second-order adsorption ((mgg−1
min−1
) and or h is the initial
sorption rate (mgg−1
min−1
). and can be obtained from the intercept and slope of plotting( ) versus (t).
where is the initial sorption rate (mgg−1
min−1
); (mgg−1
min−1
) is the second-order rate constant.
and canbe obtained from the intercept and slope of plotting
( ) versus (t). This model is more likely to predict the kinetic behavior of adsorption with chemical
adsorption being the rate controlling step. The pseudo-second-order reaction is greatly influenced by the amount
of metal on the adsorbent’s surface and the amount of metal adsorbed at equilibrium (Ho and McKay, 1999).
Pseudo second-order adsorption parameter k2 were determined at different concentration and recorded
in Table 2. Furthermore the correlation coefficients R2
for the pseudo second-order kinetic model fits are close
1.00, higher than the correlation coefficients derived from pseudo first-order model fits. Given the good
agreementbetweenmodelfitandexperimentallyobservedequilibriumadsorptioncapacityinaddition to
thelargecorrelationcoefficients,thissuggeststhat Cd(II)and Th(IV) adsorption followedpseudosecond-
orderkineticsand adsorbent ions were adsorbedontotheCorchorusolitoriusviachemicalinteraction.
8. Corchorusolitoriuswaste (mulukiya) as a potential sorbent for the removal of cadmium (II) and
www.iosrjournals.org 48 | Page
Fig. 9Pseudo-second-order kinetics model for Cd(II) and Th(IV) concentrations (30–100 mg/L)adsorption onto
the Corchorusolitorius.
Table 2 Kinetic parameters for the adsorption of Cd(II) and Th(IV) ontoCorchorusolitorius
Concentration (mg/L) Pseudo first -order Pseudo second -order
(x10-2
min-1
) R2
(x10-3
g/(mg.min)) R2
Cd(II)
Th(IV)
30
50
70
100
30
50
70
100
8.86
7.82
7.59
8.28
8.88
8.94
9.24
9.93
0.993
0.994
0.992
0.995
0.984
0.982
0.970
0.974
4.59
4.72
4.64
5.06
5.73
5.92
5.47
5.64
0.998
0.999
0.999
0.999
0.999
0.999
0.999
0.999
3.5 Adsorption isotherm
The adsorption data are usually collected in terms of the total amount of the adsorbate adsorbed at the
adsorbent’s surface. When the amount adsorbed at equilibrium is plotted against the equilibrium concentration
of the adsorbateat constant temperature, adsorption isotherms are obtained. Since an adsorption isotherm gives
an idea about the adsorption capacity of the adsorbent, this can be used for optimizing the application of an
adsorbent. The common adsorption isotherm models are Langmuir and Freundlich, (Langmuir-Freundlich).
These equations were tested to fit the experimental adsoption data of Cd(II) and Th(IV) ions. The Langmuir
model suggests a monolayer adsorption onto the adsorbent having uniform surface sites with equivalent
energies and the adsorbed species do not interact with one another (Langmuir, 1918). The Freundlich model is
an empirical one relating adsorption onto heterogeneous surface (Freundlich, 1906). This model is typical of
heterogeneous surfaces and suggests that thesurface active sites of the adsorbent have unequal binding energies.
Langmuir equation:
= (4)
Freundlich equation:
= (5)
where, (mg/g) is the amount adsorbed at equilibrium and (mg/L) is the equilibrium concentration of the
metal ions in solution. and are Langmuir constants associated with adsorption capacity and binding
energyof adsorption, respectively. and represent Freundlich’s constants connected to adsorption ability
and the heterogeneity factor, respectively. The isotherms constants of Cd(II) and Th(IV) ions onto
Corchorusolitoriusare illustrated in (Table 3).The , was studied as a function of . Based on the correlation
coefficients (Table 3), the Langmuir equation gives a better fit of experimental data than the Freundlich, for the
adsorption of Cd(II) and Th(IV) ions. This suggests a monolayer adsorption onto the adsorbent having uniform
surface sites with equivalent energies,The Freundlichconstant was below 1 at all the experimental
concentrations,indicative of high adsorption intensity (Tsai et al.,2003).
0 50 100 150 200
0
2
4
6
8
Cd(II)
30 mg/L
50 mg/L
70 mg/L
100 mg/L
(t/qt
(min-mg-g
-1
)
t/min
0 50 100 150 200
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5 Th(IV)
30 mg/L
50 mg/L
70 mg/L
100 mg/L
(t/qt
(min-mg-g
-1
)
t/min
9. Corchorusolitoriuswaste (mulukiya) as a potential sorbent for the removal of cadmium (II) and
www.iosrjournals.org 49 | Page
Table 3Various isotherm parameters for the adsorption of Cd(II) andTh(IV) onto Corchorusolitorius.
Metal ionLangmuirFreundlich
Cd(II) 95.55 4.58
0.0121 0.007
R2
0.960 R2
0.9568
Th(IV) 44.94 2.79
0.043 0.0372
R2
0.979 R2
0.9755
IV. Conclusions
Batch adsorption studies proved that the new adsorbent,Corchorusolitorius has high adsorption
capacity for Cd(II)and Th(IV) ions in the pH range 4.0–6.0. Kinetics datafitted well with pseudo second-order
model confirmingthe chemisorptions of the metal ions onto Corchorusolitorius.The adsorption equilibrium
experiments matched wellwith the Freundlich isotherm model.The results of thiswork showed that the new
adsorbent Corchorusolitoriuscan beeffectively used for the removal of metal ions from aqueoussolutions and
other industrial effluents.
References
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