This document summarizes a study that investigated using photocatalysis to disinfect water containing E. coli bacteria. Carbon-doped titanium dioxide (TiO2) photocatalyst was tested under UV and visible light irradiation. The study found that 99.94% of E. coli bacteria was killed after 120 minutes of treatment with 0.2 grams of carbon-doped TiO2 per 200 ml of water sample under UV light. Under visible light, 99.1% disinfection was achieved after 120 minutes, likely due to the combined effect of UV light and TiO2. The carbon-doped TiO2 performed better than undoped TiO2. The photocatalytic method shows potential for water disinfection as an alternative
International Refereed Journal of Engineering and Science (IRJES)irjes
International Refereed Journal of Engineering and Science (IRJES) is a leading international journal for publication of new ideas, the state of the art research results and fundamental advances in all aspects of Engineering and Science. IRJES is a open access, peer reviewed international journal with a primary objective to provide the academic community and industry for the submission of half of original research and applications
Synthesis Of Cobalt Doped Titania Nano Materials Assisted By Anionic Heteroge...IJERA Editor
: This paper presents about the synthesis of (0.25-1.0) wt.% cobalt doped titania nanomaterials
without surfactants: pure Co2+/TiO2 and in presence of 1,4-Butane sultone and 1,3-Propane sultone Anionic
Gemini surfactants and CTAB (Heterogemini surfactant)-0.5wt.%Co2+/TiO2-HgS(1&2).The synthesized nano
photocatalysts have been characterized by using various advanced techniques like X-Ray Diffraction (XRD),
Ultraviolet-visible Diffuse Reflection Spectroscopy (UV-Vis DRS), X-ray Photoelectron Spectroscopy (XPS),
Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometry (EDS), Fourier Transform Infrared
Spectroscopic Studies (FT-IR), Transmission Electron Microscopy (TEM). From the characterization studies all
the catalysts synthesized were reported in anatase phase. TEM indicates the particles size of prepared catalysts
reported with 7-10 nm and 15 nm for pure Co2+/ TiO2 catalyst. From XPS studies Cobalt was found to be in +2
oxidation state. From BET results the surface area was reported to be-89.51 and 77.93 (m2
/g) for Co2+/TiO2-
HgS(1)& Co2+/TiO2-HgS(2). From UV-DRS studies absorbance band shifted more towards visible region (red
shift). In order to find out the efficiency of the synthesized photocatalyst the photocatalytic activity studies were
carried out by degradation of Acid Red as a model azo dye pollutant in presence of the visible light irradiation.
The antibacterial activity of the synthesized catalysts against Escherichia coli was also studied. Thus from the
results 0.5wt.% Co2+/TiO2-HgS(1) exhibited highest photocatalytic activity for the degradation of azo dye Acid
Red as well as proved to be an excellent antibacterial agent
Background- Chitosan is a natural, biocompatible, biodegradable, nontoxic and easily available polymer that can be used to prepare nanoparticles. Chitosan nanoparticles can be widely used in pharmaceutical industries as an antimicrobial agent or as drug delivery vehicle. Objectives- Aim of the study was to prepare chitosan nanoparticles and characterize them. Methods: Chitosan nanoparticles were prepared by ionic gelation method and characterized by UV-Vis spectroscopy, FTIR (Fourier transform infrared spectroscopy), DLS (Dynamic Light Scattering) and Scanning electron microscopy (SEM). Results- The present study showed that chitosan nanoparticles were successfully prepared by ionic gelation method. The obtained chitosan nanoparticles were characterized and study revealed that they are stable spherical in shape. The size of chitosan nanoparticles (CSNPs) at selected concentration was 216 nm and zeta potential 50mV was done by zeta sizer Nano S (Malvern, UK). Conclusion- Chitosan nanoparticles were successfully prepared by ionic gelation method.
Key-words- Chitosan, Chitosan nanoparticles, DLS, FTIR, SEM, UV-Vis spectroscopy
International Refereed Journal of Engineering and Science (IRJES)irjes
International Refereed Journal of Engineering and Science (IRJES) is a leading international journal for publication of new ideas, the state of the art research results and fundamental advances in all aspects of Engineering and Science. IRJES is a open access, peer reviewed international journal with a primary objective to provide the academic community and industry for the submission of half of original research and applications
Synthesis Of Cobalt Doped Titania Nano Materials Assisted By Anionic Heteroge...IJERA Editor
: This paper presents about the synthesis of (0.25-1.0) wt.% cobalt doped titania nanomaterials
without surfactants: pure Co2+/TiO2 and in presence of 1,4-Butane sultone and 1,3-Propane sultone Anionic
Gemini surfactants and CTAB (Heterogemini surfactant)-0.5wt.%Co2+/TiO2-HgS(1&2).The synthesized nano
photocatalysts have been characterized by using various advanced techniques like X-Ray Diffraction (XRD),
Ultraviolet-visible Diffuse Reflection Spectroscopy (UV-Vis DRS), X-ray Photoelectron Spectroscopy (XPS),
Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometry (EDS), Fourier Transform Infrared
Spectroscopic Studies (FT-IR), Transmission Electron Microscopy (TEM). From the characterization studies all
the catalysts synthesized were reported in anatase phase. TEM indicates the particles size of prepared catalysts
reported with 7-10 nm and 15 nm for pure Co2+/ TiO2 catalyst. From XPS studies Cobalt was found to be in +2
oxidation state. From BET results the surface area was reported to be-89.51 and 77.93 (m2
/g) for Co2+/TiO2-
HgS(1)& Co2+/TiO2-HgS(2). From UV-DRS studies absorbance band shifted more towards visible region (red
shift). In order to find out the efficiency of the synthesized photocatalyst the photocatalytic activity studies were
carried out by degradation of Acid Red as a model azo dye pollutant in presence of the visible light irradiation.
The antibacterial activity of the synthesized catalysts against Escherichia coli was also studied. Thus from the
results 0.5wt.% Co2+/TiO2-HgS(1) exhibited highest photocatalytic activity for the degradation of azo dye Acid
Red as well as proved to be an excellent antibacterial agent
Background- Chitosan is a natural, biocompatible, biodegradable, nontoxic and easily available polymer that can be used to prepare nanoparticles. Chitosan nanoparticles can be widely used in pharmaceutical industries as an antimicrobial agent or as drug delivery vehicle. Objectives- Aim of the study was to prepare chitosan nanoparticles and characterize them. Methods: Chitosan nanoparticles were prepared by ionic gelation method and characterized by UV-Vis spectroscopy, FTIR (Fourier transform infrared spectroscopy), DLS (Dynamic Light Scattering) and Scanning electron microscopy (SEM). Results- The present study showed that chitosan nanoparticles were successfully prepared by ionic gelation method. The obtained chitosan nanoparticles were characterized and study revealed that they are stable spherical in shape. The size of chitosan nanoparticles (CSNPs) at selected concentration was 216 nm and zeta potential 50mV was done by zeta sizer Nano S (Malvern, UK). Conclusion- Chitosan nanoparticles were successfully prepared by ionic gelation method.
Key-words- Chitosan, Chitosan nanoparticles, DLS, FTIR, SEM, UV-Vis spectroscopy
#scichallenge2017 Photocatalytic Degradation of Synthetic Wastewaters Contain...Seher Elif Mekik
#scichallenge2017
In our project, it was aimed to purify wastewaters containing methylene blue component and harmful to environment from methylene blue. For this purpose, synthetic methylene blue waste water was formed and chemically treated by photocatalysis.
Removal of Lignin from aqueous solution using Fe3O4 Nanoparticles as an effec...IJERA Editor
The study was carried out to find out the adsorption efficiency of lignin from paper mill waste water by using Fe3O4 magnetic nanoparticles. The physico-chemical analysis of paper mill effluent results high B.O.D value. Separations of lignin from black liquor were done by acid precipitation method and removal of lignin was done with nanoparticles. Synthesis of nanoparticles was done by co-precipitation method by mixing and stirring of FeCl3.6H2O and FeCl2.4H2O solution at 2:1 molar ratio. The nanoparticles were characterized by using U.V-Vis spectrophotometer and X-Ray Diffraction. U.V-Vis spectra show absorbance spectra at around 585 nm while XRD revealed around 10 nm sizes of Fe3O4 MNPs. The removal efficiency of lignin by Fe3O4 MNPs was investigated at different pH and contact time. Maximum adsorption of lignin onto the surface of Fe3O4 MNPs took place at pH 2.5 and 10 mins of contact time. Desorption of lignin by nanoparticles was studies by using different organic solvents.
Aimed to investigate the potential of untreated jute stick charcoal as an alternative adsorbent for the treatment of dye containing wastewater. Removal of methylene blue dye from aqueous solution using jute stick charcoal has been investigated. Liquid phase adsorption experiments were conducted. Batch adsorption studies are carried out by observing the effect of experimental parameters, namely, pH, adsorbent dose, contact time and initial methylene blue concentration. The maximum removal of MB dye was 90.57% at pH 9, contact time 120 min, adsorbent dose 3 g/L and 20 mg/L initial dye concentration. Kinetic studies showed that the biosorption of MB followed Pseudo second-order kinetics. The adsorption isotherms are described by the Langmuir and Freundlich isotherms. It was found that the Freundlich equation fit better than the Langmuir equation. The maximum adsorption capacity obtained from Langmuir isotherm equation at was 29.33 mg/g. To conclude, jute stick charcoal holds promise for methylene blue removal from aqueous solution and can be used for other dyes removal and applicable in dyeing industries in Bangladesh where centralized effluent treatment plant is absent.
Abstract— 2, 4-dinitrophenol and 2, 4, 6- trinitrophenol were successfully photodegraded using visible light active monoclinic BiVO4 as photocatalyst. 10ppm of dinitrophenol is photodegraded using 50mg BiVO4 under irradiation for 3h. 10ppm trinitrophenol is photodegraded using 100mg BiVO4 under irradiation for 3h. Ease of photodegradation of DNP and TNP varied in the order DNP > TNP for the same amount of photocatalyst. Photoluminescence studies confirmed the formation of •OH free radicals due to irradiation. Synergetic effect is noticed between BiVO4 and H2O2.
Potential of Neem Leaf Powder as Bio Adsorbents for Dye Colour Removalijtsrd
In this study, two types of eco friendly and low cost bio adsorbents, Neem leaf powder NLP and acid treated Neem leaf powder TNLP were prepared for the removal of dye color from Congo red solution. The physicochemical parameters of the prepared absorbents were measured. The structural features of these absorbents were analyzed by FTIR, XRD, and SEM. These experiments were conducted with different process parameters such as adsorbent dosage and agitating time using batch adsorption method. Firstly, the dosage amount of adsorbents was optimized for constant shaking for one hour and it was observed that the maximum percent adsorption was found at 91 of 0.4 g for NLP and 76 of 0.4 g for TNLP. The optimum dosage amount of adsorbents, 0.4 g was selected for further study. After optimizing the adsorbent dosage, the optimum agitating time was observed at 60 min with the percent removal of 91 for NLP and 76 for TNLP. From this research, it was observed that NLP and TNLP can be used as bio adsorbents to remove the color of the dye solution. Thet Thet Wai | Ei Mon Aung | Nyein Chan Kyaw "Potential of Neem Leaf Powder as Bio-Adsorbents for Dye Colour Removal" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd27987.pdfPaper URL: https://www.ijtsrd.com/engineering/chemical-engineering/27987/potential-of-neem-leaf-powder-as-bio-adsorbents-for-dye-colour-removal/thet-thet-wai
Reactive Red (RR141) Solution Adsorption by Nanochitin Particle via XAS and A...drboon
Adsorption of reactive dye solution on nanochitin and chitin particle under acidic, neutral and basic condition was studied. The percentage adsorption of reactive dye solution on nanochitin and chitin under basic condition was 98% and 59%, respectively. In this study, we used ATR-FTIR spectroscopy to study the adsorption mechanism between nanochitin and reactive dye. The results indicated that the amine group of nanochitin was a functional group for the adsorption of Reactive Red (RR141) under acidic condition while the hydroxyl group of nanochitin was the main site for adsorption of Reactive Red (RR141) under basic condition. Azo group (N=N) of reactive dye might be electron donor, while amide group (-CONH2) of nanochitin was electron acceptor under neutral condition. XAS spectra obtained the changes of S atom in RR141 adsorbed onto nanochitin under acidic, whereas adsorption under neutral and basic condition caused no change in the form of S- atom in the dye.
The impact of flow rate and bed height on the adsorption behavior of methylene blue, Bismarck brown y, and indigo dyes on to Cedrus libani was investigated. The biomass was characterized by scanning electron microscopy as well as Fourier transformed infrared spectroscopy before and after adsorption to ascertain the functional groups responsible for the adsorption. The amount of dye adsorbed per unit mass of the biomass (qe) was calculated and was found to be dependent on the variables investigated within the experimental range. It was discovered that increase in bed height and flow rate increased the value of the dye adsorbed on to the biomass. The results obtained show that methylene blue dye adsorbed more onto the biomass, while indigo dye adsorbed at the least level.
Decolourisation of Nigrosine WS dye by Solar Photo-fentonAkash Tikhe
My master's dissertation thesis topic- Decolorization of Nigrosine WS dye by Homogeneous Solar Photo-Fenton Method along with Intro, Method, Result, conclusion and suggestions.
#scichallenge2017 Photocatalytic Degradation of Synthetic Wastewaters Contain...Seher Elif Mekik
#scichallenge2017
In our project, it was aimed to purify wastewaters containing methylene blue component and harmful to environment from methylene blue. For this purpose, synthetic methylene blue waste water was formed and chemically treated by photocatalysis.
Removal of Lignin from aqueous solution using Fe3O4 Nanoparticles as an effec...IJERA Editor
The study was carried out to find out the adsorption efficiency of lignin from paper mill waste water by using Fe3O4 magnetic nanoparticles. The physico-chemical analysis of paper mill effluent results high B.O.D value. Separations of lignin from black liquor were done by acid precipitation method and removal of lignin was done with nanoparticles. Synthesis of nanoparticles was done by co-precipitation method by mixing and stirring of FeCl3.6H2O and FeCl2.4H2O solution at 2:1 molar ratio. The nanoparticles were characterized by using U.V-Vis spectrophotometer and X-Ray Diffraction. U.V-Vis spectra show absorbance spectra at around 585 nm while XRD revealed around 10 nm sizes of Fe3O4 MNPs. The removal efficiency of lignin by Fe3O4 MNPs was investigated at different pH and contact time. Maximum adsorption of lignin onto the surface of Fe3O4 MNPs took place at pH 2.5 and 10 mins of contact time. Desorption of lignin by nanoparticles was studies by using different organic solvents.
Aimed to investigate the potential of untreated jute stick charcoal as an alternative adsorbent for the treatment of dye containing wastewater. Removal of methylene blue dye from aqueous solution using jute stick charcoal has been investigated. Liquid phase adsorption experiments were conducted. Batch adsorption studies are carried out by observing the effect of experimental parameters, namely, pH, adsorbent dose, contact time and initial methylene blue concentration. The maximum removal of MB dye was 90.57% at pH 9, contact time 120 min, adsorbent dose 3 g/L and 20 mg/L initial dye concentration. Kinetic studies showed that the biosorption of MB followed Pseudo second-order kinetics. The adsorption isotherms are described by the Langmuir and Freundlich isotherms. It was found that the Freundlich equation fit better than the Langmuir equation. The maximum adsorption capacity obtained from Langmuir isotherm equation at was 29.33 mg/g. To conclude, jute stick charcoal holds promise for methylene blue removal from aqueous solution and can be used for other dyes removal and applicable in dyeing industries in Bangladesh where centralized effluent treatment plant is absent.
Abstract— 2, 4-dinitrophenol and 2, 4, 6- trinitrophenol were successfully photodegraded using visible light active monoclinic BiVO4 as photocatalyst. 10ppm of dinitrophenol is photodegraded using 50mg BiVO4 under irradiation for 3h. 10ppm trinitrophenol is photodegraded using 100mg BiVO4 under irradiation for 3h. Ease of photodegradation of DNP and TNP varied in the order DNP > TNP for the same amount of photocatalyst. Photoluminescence studies confirmed the formation of •OH free radicals due to irradiation. Synergetic effect is noticed between BiVO4 and H2O2.
Potential of Neem Leaf Powder as Bio Adsorbents for Dye Colour Removalijtsrd
In this study, two types of eco friendly and low cost bio adsorbents, Neem leaf powder NLP and acid treated Neem leaf powder TNLP were prepared for the removal of dye color from Congo red solution. The physicochemical parameters of the prepared absorbents were measured. The structural features of these absorbents were analyzed by FTIR, XRD, and SEM. These experiments were conducted with different process parameters such as adsorbent dosage and agitating time using batch adsorption method. Firstly, the dosage amount of adsorbents was optimized for constant shaking for one hour and it was observed that the maximum percent adsorption was found at 91 of 0.4 g for NLP and 76 of 0.4 g for TNLP. The optimum dosage amount of adsorbents, 0.4 g was selected for further study. After optimizing the adsorbent dosage, the optimum agitating time was observed at 60 min with the percent removal of 91 for NLP and 76 for TNLP. From this research, it was observed that NLP and TNLP can be used as bio adsorbents to remove the color of the dye solution. Thet Thet Wai | Ei Mon Aung | Nyein Chan Kyaw "Potential of Neem Leaf Powder as Bio-Adsorbents for Dye Colour Removal" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd27987.pdfPaper URL: https://www.ijtsrd.com/engineering/chemical-engineering/27987/potential-of-neem-leaf-powder-as-bio-adsorbents-for-dye-colour-removal/thet-thet-wai
Reactive Red (RR141) Solution Adsorption by Nanochitin Particle via XAS and A...drboon
Adsorption of reactive dye solution on nanochitin and chitin particle under acidic, neutral and basic condition was studied. The percentage adsorption of reactive dye solution on nanochitin and chitin under basic condition was 98% and 59%, respectively. In this study, we used ATR-FTIR spectroscopy to study the adsorption mechanism between nanochitin and reactive dye. The results indicated that the amine group of nanochitin was a functional group for the adsorption of Reactive Red (RR141) under acidic condition while the hydroxyl group of nanochitin was the main site for adsorption of Reactive Red (RR141) under basic condition. Azo group (N=N) of reactive dye might be electron donor, while amide group (-CONH2) of nanochitin was electron acceptor under neutral condition. XAS spectra obtained the changes of S atom in RR141 adsorbed onto nanochitin under acidic, whereas adsorption under neutral and basic condition caused no change in the form of S- atom in the dye.
The impact of flow rate and bed height on the adsorption behavior of methylene blue, Bismarck brown y, and indigo dyes on to Cedrus libani was investigated. The biomass was characterized by scanning electron microscopy as well as Fourier transformed infrared spectroscopy before and after adsorption to ascertain the functional groups responsible for the adsorption. The amount of dye adsorbed per unit mass of the biomass (qe) was calculated and was found to be dependent on the variables investigated within the experimental range. It was discovered that increase in bed height and flow rate increased the value of the dye adsorbed on to the biomass. The results obtained show that methylene blue dye adsorbed more onto the biomass, while indigo dye adsorbed at the least level.
Decolourisation of Nigrosine WS dye by Solar Photo-fentonAkash Tikhe
My master's dissertation thesis topic- Decolorization of Nigrosine WS dye by Homogeneous Solar Photo-Fenton Method along with Intro, Method, Result, conclusion and suggestions.
Photocatalytic Degradation of Azo Dye (Methyl Red) In Water under Visible Lig...IJEAB
Commercial TiO2 (P25) co-doped with bimetallic silver and nickel nanoparticles (Ag-Ni/TiO2) was prepared by g-irradiation method. The properties of Ag-Ni/TiO2 were characterized by X-Ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS), energy dispersive X-ray spectroscopy techniques (EDX) and surface area measurement by Brunauer-Emmett-Teller (BET) method. The size of silver and nickel nanoparticles was determined by TEM to be of 1-2 nm.The photo-catalytic degradation of azo dye methyl red in the aqueous suspensions of TiO2 and Ag-Ni/TiO2 under visible light was carried out to evaluate the photo-catalytic activity. Results showed that Ag-Ni/TiO2 was found to enhance photo-degradation efficiency of azo dye metyl red compared to commercial TiO2. The results showed that Ag 3% (w/w) and Ni 1.5% (w/w) co-doped TiO2 had the highest photoactivity among all studied samples under visible light. Thus, g-irradiation method can be suitably applied to prepare photo-catalyst of Ag-Ni/TiO2with highly photocatalytic activity.
Enhancing the photocatalytic activity of commercial P25 퐓퐢퐎 powder by combin...IJECEIAES
Titanium dioxide ( TiO 2 ) is the most popular photocatalytic material. However, its operation is limited to UV light only. In this paper, we tried to improve the visible light responsiveness of TiO by doping Nickel (Ni) using the sol-gel method. By combining Ni-doped TiO 2 powder with commercially available P25 TiO 2 2 powder to make photocatalytic thin films, significant improvement in photocatalytic activity has been obtained. Furthermore, we also studied the relationship between the surface condition of photocatalytic thin films and their photocatalytic activity. The surface condition was improved by the multilayer electrophoresis deposition method. Based on experimental results, by combining 10 20 wt% Ni-doped TiO with P25 TiO , we could significantly enhance the photocatalytic activity of P25 TiO 2 .
Visible Light Assisted Degradation of Eosin Yellow using Heteroatom Functiona...IJERA Editor
10 ppm EY dye were successfully photodegraded using visible light active 0.75wt% Ba & 0.25wt% Zr codoped
TiO2 nanomaterial that were synthesized by Sol-gel method as nanomaterials under irradiation for 20
minutes and characterized by various advanced instrumental techniques. The X-ray Diffraction Spectroscopic
showed that the prepared nanomaterial were in the anatase phase with 2θ at 25.3º. UV-visible Diffuse
Reflectance Spectra analysis explained that the dopants found in the TiO2, imparts a significance absorption
shift towards visible region and their exisistance were confirmed by X-ray Photoelectron Spectral data.
Quantitatively the formation of hydroxyl radical by the nanomaterial in aqueous solution under visible
light irradiation was investigated by the photoluminiscent technique. Finally the effects of different parameters
in the photocatalytic degradation of EY were established in aqueous solution
Journal of Science and Technology is an strive for Original Quality Research papers and Strictly No Plagiarism on all the Publications. It’s provided fast publication process in our journal. that has immediate, worldwide, barrier-free access to the full text of research articles without requiring a subscription to the articles published in this journal.
Photocatalytic application of TiO2/SiO2-based magnetic nanocomposite (Fe3O4@S...Iranian Chemical Society
In this research we have developed a treatment method for textile wastewater by TiO2/SiO2-based magnetic nanocomposite. Textile wastewater includes a large variety of dyes and chemicals and needs treatments. This manuscript presents a facile method for removing dyes from the textile wastewater by using TiO2/SiO2-based nanocomposite (Fe3O4@SiO2/TiO2) under UV irradiation. This magnetic nanocomposite, as photocatalytically active composite, is synthesized via solution method in mild conditions. A large range of cationic, anionic and neutral dyes including: methyl orange, methylene blue, neutral red, bromocresol green and methyl red are used for treatment investigations. Neutral red and bromocresol green have good results in reusing treatment. The high surface area of nanocomposites improve the kinetic of wastewater treatment. In this method, by using the magnetic properties of Fe3O4 nanoparticles, TiO2-based photocatalyst could be separated and reused for 3 times. The efficiency of this method is respectively 100% and 65% for low concentration (10 ppm) and high concentration (50 ppm) of neutral red and bromocrosol green after 3 h treatment. The efficiency of treatment using the second used nanocomposite was 90% for 10 ppm of the same dyes.
Photo-electrocatalytic activity of TiO2 nanotubes prepared with two-step anod...Iranian Chemical Society
To improve the photo-catalytic degradation of salicylic acid, we reported the fabrication of ordered TiO2 nanotube arrays by a simple and effective two-step anodization method and then these TiO2 nanotubes treated in a methanol solution under UV light irradiation. The TiO2 nanotubes prepared in the two-step anodization process showed better photo-catalytic activity than TiO2 nanotubes prepared in one-step anodization process. Also, compared with TiO2 nanotubes without the UV pretreatment, the TiO2 nanotubes pretreated in a methanol solution under UV light irradiation exhibited significant enhancements in both photocurrent and activity. The treated TiO2 nanotubes exhibited a 5-fold enhancement in photocurrent and a 2.5-fold increase in the photo-catalytic degradation of salicylic acid. Also the effect of addition of persulfate and periodate on the photo-catalytic degradation of salicylic acid were investigated. The results showed that the degradation efficiency of salicylic acid increased with increasing persulfate and periodate concentrations. These treated TiO2 nanotubes are promising candidates for practical photochemical reactors.
PHOTOCATALYTIC DEGRADATION OF RB21 DYE BY TIO2 AND ZNO UNDER NATURAL SUNLIGHT...IAEME Publication
The present work aims to degrade the RB21 dye from synthetic wastewater using
semiconductors TiO2 and ZnO. The activity of photocatalytic degradation process of dye was
carried out using different light sources of 900 W/m
2
intensity in natural sunlight from 02:00 to
04:00 pm with 48°C temperature in Ahmedabad city in the month of May, 600 Watt microwave
oven and high pressure UV-light photocatalytic reactor of wavelength 200-450 nm. All the
experiments were performed with dye concentration 50 mg/L, catalyst dosage 0.8 g, pH 7, room
temperature, irradiation time 240 min followed by 30 min in dark. All the samples were collected at
different time intervals of 30, 60, 90, 120, 150, 180, 210, 240 min for the analysis of COD
degradation and color removal. The best performances was achieved using high pressure UVphotocatalytic
reactor using TiO2. The successful result obtained using TiO2is 80% COD
degradation and 99% color removal followed by 75% COD and 99% color removal with ZnO.
Chemical kinetics was found to follow first order mechanism. The formation of intermediate
compounds and identification of the final products were carried out using LCMS/MS analysis and
FT-IR techniques.
Degradation and Microbiological Validation of Meropenem Antibiotic in Aqueous...IJERA Editor
Aqueous UV, UV/H2O2, UV/TiO2 and UV/TiO2/H2O2mediateddegradation/oxidation of the carbapenem antibiotic, meropenem (MERO) was experimentally studied. Degussa P-25 titanium dioxide was used as photocatalyst and UV-light source was used for activation of TiO2.The nanosized titanium dioxide was immobilized on the glass support for improving the efficiency and economics of the photocatalytic processes. The immobilized film of titanium dioxide has been characterized, using X-ray diffraction (XRD) andscanning electron microscopy (SEM).The study of antibiotic degradation was conducted in the specific Batch Photocatalytic Reactor. MERO standard solution was used at 500 μg/ml concentration, which degraded up to 99% of antibiotics. Microbiological assay showed that the loss of antibacterial activity is directly proportional to the time of UV-irradiation. The experiment also showed that the UV-irradiation itself causes the degradation of antibiotics, but in very slow manner in comparison to the photocatalysis process. The experimental study showed that UV/TiO2/H2O2 system is effective and efficient for the treatment of antibiotic waste.
Nanometric TiO2 powders were obtained from low tem-perature calcination of a TiO2 resin prepared using the Pechini’s method. Firing the TiO2 resin at 500 oC/2h a powder with anatase phase was obtained, otherwise firing the TiO2 resin at 700 oC/2h a powder with rutile phase was achieved as measured by X-ray diffraction (XRD). The anatase powder presented average particle size of 60 nm observed by Scanning Electronic Microscopy (SEM-FEG) micrographs and average crystallite size of 13 nm calcu-lated from the XRD, while the rutile powder presented av-erage crystallite size of 34 nm. Nanocrystalline TiO2 films with good homogeneity and optical quality were obtained with 80 nm and 320 nm in thickness by Electron Beam Physical Vapour Deposition (EB-PVD) in vacuum on amorphous quartz substrates submitted at 350oC during the evaporation. The 80 nm-thick film presented average particle size of 140 nm and roughness (Ra) of 1.08 nm and the 320 nm-thick film showed average particle size of 350 nm and roughness (Ra) of 2.14 nm measured by Atomic Force Microscopy (AFM). In these conditions of deposi-tion the films presented only anatase phase observed by XRD and MicroRaman spectroscopy.
Photocatalytic decomposition of isolan black by tio2, tio2 sio2 core shell na...eSAT Journals
Abstract Anatase phase TiO2, TiO2-SiO2 (TS) photocatalyst were prepared by wet chemical technique. The synthesized nano particles were characterized by XRD, SEM-EDAX, TEM, UV and FTIR spectroscopy. The grain size of the TiO2 nanoparticles was found to be 24nm, while 7-10nm for TiO2-SiO2was calculated by using Scherrer’s formula. The TiO2-SiO2 core shell nanocomposites were identified by TEM analysis. Ti-O, Si-O bonds were confirmed by EDAX and FTIR. The photocatalytic decomposition of Isolan black was investigated. The photo catalytic activity of TiO2, enhanced by doping of SiO2 on TiO2. The important factors such as pH, Wt % of dyes and nanoparticles, intensity of light are also affect the photocatalytic action. Index Terms: Nanocomposites, Photocatalyst, TEM, SEM-EDAX.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
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A REVIEW PAPER ON AIR QUALITY METER WITH WARNING SYSTEMMichael George
Safety plays a major role in today’s world and it is necessary that good safety systems are to be implemented in places of education and work. This work modifies the existing safety model installed in industries and this system also be used in homes and offices. The main objective of the work is designing microcontroller based toxic gas detecting and alerting system. The hazardous gases like LPG and Air quality index gases were sensed and displayed each and every second in the LCD display. If these gases exceed the normal level then an alarm is generated immediately and also an alert message (SMS) is sent to the authorized person through the GSM. The advantage of this automated detection and alerting system over the manual method is that it offers quick response time and accurate detection of an emergency and in turn leading faster diffusion of the critical situation
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As we are moving in a World of advancement, so the security is the major concern in order to keep data isolate from the unauthorised users to access. In today’s World, we need high degree security system for the protection of our document, important data, as well as memory and jewellery. This review paper presents a secure fingerprint locker which is feasible. This system is proved successful on all norms of security of lockers. There are other methods of verifying authentication through password, RFID but this method is most efficient and reliable. To provide perfect security to the lockers and to make the work easier, this project is taking help of two different technologies, i.e. Embedded System and Biometrics. Biometrics is basically the measurement and use of unique characteristics of living beings to make them distinguish from one another. And this is more reliable then passwords and tokens which can be lost or stolen by the humans. In this paper we are providing the work done on this technique.
In this paper, a new sliding mode controller is proposed as the indirect control method and compared to a simple direct control method in order to control a buck converter in photovoltaic applications. The solar arrays are dependent power sources with nonlinear voltage-current characteristics under different environmental conditions. From this point of view, the DC/DC converter is particularly suitable for the application of the sliding mode control in photovoltaic application, because of its controllable states. Solar tracking allows more energy to be produced because the solar array is able to remain aligned to the sun. This method has the advantage that it will guarantee the maximum output power possible by the array configuration. Problems and possible improvements will also be presented.
LINE CALL REDUCTION USING PROCESS IMPROVEMENT IN AN AUTOMOBILE COMPANY: A SIM...Michael George
The aim of this paper is to decrease the chances of inventory going below the set minimum by eliminating the factors causing shortages and delays. When inventory goes below set minimum it is then called as line call, where the customer (Set Part Supply Department) demands immediate supply of those product undergoing shortage. The aim is to reduce the number of line calls by eliminating root causes for line calls. The reasons for line calls will be identified using root cause analysis and after studying the causes, counter measures for each cause will be identified and implemented. Some of these measures involve in changing processes and adding new equipment to reduce overall work and some involve statistically finding the problem areas in the data set. After all the two counter measures were implemented, we were able to reduce 85% of overall line calls leading to a large saving to the plant in terms of equipment area and man power. Also with the implementation of this concept, work burden to employees is reduced, thus creating an enjoyable work place.
WOMEN ENTREPRENEURSHIP IN INDIA: PRESENT STATUS, PROBLEMS AND PROSPECTSMichael George
“No war can be fought without the help of the better half of our society”. Social and economic development of women is necessary for overall economic development of any society or a country. The term “Women Entrepreneurship” refers to an act of business ownership and business creation that empowers women economically increases their economic strength & position in society. Despite all the social hurdles, Indian women stand tall from the rest of the crowd and are applauded for their contributions to their respective field and the economy as a whole. The hidden entrepreneurial potential of women has gradually been changing their role and economic status in the society. Women are increasingly being conscious of their existence & their rights. However, New Industrial policy of 2009-14 and other schemes are helping the women entrepreneurs in the form of generation of employment, income and to improve their social status. Women leaders are Risk takers, opportunist, innovator, flexible, ambitious, enthusiastic, and hard-working. They need to be lauded for their increased utilization of modern technology, increased investment, finding a niche in the expect market, creating a sizable employment for others and setting the trend for other woman entrepreneurs in the organized sector. The study analyses their present status, reasons that have prompted them to unleash their entrepreneurial energies into start-ups and the different challenges faced by them. The study finally concludes to what extents the various support systems in India can further foster a conducive ecosystem for them.
DESIGN AND MODELLING OF STANDALONE HYBRID POWER SYSTEM WITH MATLAB/SIMULINKMichael George
This paper presents a standalone hybrid power system using wind/PV/diesel/Battery energy system with Matlab/Simulink environment. PV & Wind are the primary power sources of the system and battery is used as a backup for long run application. Here we have also compare the performance of PV/Wind/Battery connected system with PV/Wind/Diesel connected hybrid power system. The most frequently used renewable energy sources are those consisting of PV module and/or wind Turbine with/or Diesel generator, and some energy storage or backup system.
Modelling the Kinetic of UV Water DisinfectionMichael George
Ultraviolet disinfection is an attractive tool for treating water and eliminating pathogens with safe and available technology especially in developing countries where waterborne diseases cause the death of thousands of people every year. Even though UV is an easy tool to perform disinfection, concerns over the potential of microorganism reactivation constitute an issue for its development. In order to avoid this phenomenon, estimating the right dose of UV irradiance, the number of viable microorganisms and the sufficient contact time are important parameters to consider when performing UV disinfection. For this purpose, it’s current to use mathematical modelling. This work aimed to study the modelling of the kinetic of water disinfection by UV irradiation. Two kinetic models (Chick-Watson and Hom) were tested as to ability to scale disinfection of Gram negative Escherichia coli and Gram positive Lactobacillus Helveticus by different ultraviolet (UV) light inactivation process: UV alone, UV and TiO2 as a photocatalyst and finally UV and ZnO as a photocatalyst. The two tested models (Chick-Watson and Hom) fitted the kinetic of disinfection of E. coli. However, it must be noticed that, the simple agreement between experimental data and model predictions does not necessarily prove that either of the models is mechanistically correct. For the disinfection of L. Helveticus, neither of the two models fitted the experimental plots. The divergence existing between experimental and modelling results proves only that the empirical models can’t be generalized to all deactivated microorganisms.
TO ENHANCE THE SLEEP EXPERIENCE OF THE GUESTS IN THE HOTELS (A Study on the F...Michael George
The Five Star Hotels in India, since a decade has started paying special attention towards a better sleep experience for their guests. The Hotel bedding revolution is a global phenomenon today and the hotels in India are no exception to it. Most of the guests are unable to sleep in the guest rooms either because the beds are uncomfortable, they do not get the desired pillow type, or the rooms are not dark enough or quiet for a sound sleep. The hotels provide different types of mattresses ,pillows, a good night kit with eye mask, ear plugs, special aroma therapy oil, sleep inducing music ,sleep inducing snacks for their guests as a part of the turn down service.The findings of this research suggests that the Five Star Hotels in Pune are making conscious effort to provide comfortable bed along with sound sleep experience to their guests to sustain in today`s competitive market. The concept is at an early stage, where the resources are available but not fully utilised. The hotel needs to train their staff to create the “wow” effect for their guests to return to their hotels.
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SINGLE PHASING, PHASE REVERSAL, OVERVOLTAGE, UNDER VOLTAGE AND OVERHEATING PR...Michael George
This paper tends to develop for protection of three phase induction motor from single phasing, phase reversal, over voltage and under voltage. Due to this electrical fault the winding of motor get heated which lead to insulation failure and thus reduce the life time of motor. This fault is generated in induction motor due to variation in induction motor parameters. When three phase induction motor runs continuously, it is necessary to protect the motor from these anticipated faults. Three phase induction motor generally directly connected through the supply, if the supply voltage has sag and swell due to fault the performance of motor is affected and in some cases winding is burned out. When phase sequence (RYB) is reversed due to wrong connection then motor start rotating in another direction, if supply system has only one phase and other phase is disconnected then it is single phasing problem.
A LOW POWER BASED ASYNCHRONOUS CIRCUIT DESIGN USING POWER GATED LOGICMichael George
The implementation of a low power logic based asynchronous circuit with the help of power gated logic. In asynchronous power gated logic (APL) circuit, each pipeline stage was incorporated with efficient charge recovery logic (ECRL) gate; handshake controller and partial charge reuse (PCR) mechanism. The main objective was, to provide a new lower power solutions using power gating (PG) for very large scale integration (VLSI) designers. ECRL have the simplest structure and high energy efficiency which was used to implement the functional blocks of APL circuit. PG adopts two approaches, fine grain and coarse grain approach. The circuit based asynchronous with fine grain approach is called asynchronous fine grain power gated logic (AFPL) circuit and coarse grain approach is said to be asynchronous coarse grain power gated logic (ACPL) circuit. In the PCR mechanism, part of the charge on the output node of an ECRL gate was reused to charge the output node of another ECRL gate. This help to reducing the energy dissipation. Therefore, leakage power reduction should begin with power gated logic and PCR mechanism. To mitigate the area overhead of the AFPL circuit, coarse grain power gating technique have been developed.
DETECTING DOUBLY COMPRESSED H.264/AVC VIDEOS USING MARKOV STATISTICS SCHEMEMichael George
MPEG-4 is a method of defining compression of audio and video digital data. MPEG-4 videos double compression method is used to decompress video from spatial domain to the frequency domain and then resaved with a different quantization matrix. Markov feature is a second order statistics which was adopted to detect double compression artifacts in the original video. In proposed system, double compression artifacts in H.264/AVC was detected by Markov statistics and by comparing two videos the ratios such as peak signal- to- noise ratio (PSNR), mean squared error (MSE) and structural similarity index (SSIM) are calculated.
ESTIMATING PAPER IN VARIABLE GAIN RELAYING ON IMPERFECT CSIMichael George
Amplify and Forward (AF) relaying, which refers to simple amplification and forwarding of the information sent from a source to destination terminal. For the conventional three node Amplify and Forward (AF) relaying setup, investigate the effect of imperfect channel state information (CSI) at the relaying on the overall performance. In particular, consider variable gain AF relaying and derive expression for the outage and the error probability and expression for the complimentary cumulative distribution function (CCDF) of the peak-to-average power ratio (PAPR) at the relay is calculated. The proposed method was drawn from a performance analysis for outage CSI at the relay. Finally the project work was simulated using the MATLAB software.
AUTOMATIC FAULT TOLERANCE USING SELF ADAPTIVE SYSTEMMichael George
Fault tolerance (F-T) was an important issue in electronic device. However, such system was still impractical in many cases, particularly due to the complex rerouting process that follows cell replacement. In this project, proposed a dynamic reconfiguration capabilities system, therefore, a faulty module could be replaced and the whole system’s functions and connections were maintained by simply assigning the same encoded data to a spare (stem) module. The proposed system reroutes data flow. To detect permanent errors at runtime, a novel in-line test (ILT) method using spare wires and a test pattern generator wass proposed. In addition, an improved syndrome storing-based detection (SSD) method was presented. In the presence of permanent errors, the probability of correct transmission in the proposed systems was improved by up to 140% over the standalone hamming code. Furthermore, this method achieves up to 38% area, 64% energy, and 61% latency improvements.
ESTIMATION OF SYMBOL TIMING AND CARRIER FREQUENCY OFFSET USING SYNCHRONIZATI...Michael George
OFDM/OQAM is preferred as multicarrier system which operates over a multipath channel. By using the multipath channel the signal-to-noise ratio. In earlier, sub carriers are used to transmit the signals. Nowadays, FFT and DFT are used for transmitting the signals based upon the bit values. AWGN is a channel used to identify the noise produced at the output by adding the noise in the blind signal. By reducing subcarriers the noise and timing are reduced. FFT bit value was increased which provides better performance. In the multicarrier system, the error and noise was reduced by increasing the bit value.
In this paper, a new sliding mode controller is proposed as the indirect control method and compared to a simple direct control method in order to control a buck converter in photovoltaic applications. The solar arrays are dependent power sources with nonlinear voltage-current characteristics under different environmental conditions. From this point of view, the DC/DC converter is particularly suitable for the application of the sliding mode control in photovoltaic application, because of its controllable states. Solar tracking allows more energy to be produced because the solar array is able to remain aligned to the sun. This method has the advantage that it will guarantee the maximum output power possible by the array configuration. Problems and possible improvements will also be presented.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
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Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.