The document describes a study investigating an alginate encapsulated nanoparticle-microorganism system for remediating trichloroethylene (TCE) contaminated groundwater. The study was conducted in three phases: Phase I examined TCE degradation using encapsulated nano zero-valent iron (NZVI), Phase II combined encapsulated NZVI with Pseudomonas putida bacteria, and Phase III combined encapsulated NZVI with Dehalococcoides bacteria. Results showed the encapsulated systems were able to degrade over 88% of TCE within reaction timeframes, demonstrating the potential of this metal-microorganism system for in-situ groundwater remediation.
Photocatalytic Degradation of Ciprofloxacin using TiO2 in a Slurry Photocatal...ijtsrd
A slurry photocatalytic reactor assessed for the degradation of ciprofloxacin CFX . The effect of operating parameters like initial ciprofloxacin concentration, catalyst dosage and pH on ciprofloxacin degradation was analysed in this study. Batch study was conducted and it showed 90 degradation of the CFX. It was observed the optimum concentration of CFX was 1500 µg l, catalyst dosage was 1 g l at the pH of 9 for the duration of 3 hours. The photocatalytic degradation of CFX followed the pseudo first order kinetics. Karthika. V | Vedavalli. S | Afreen Begum. M "Photocatalytic Degradation of Ciprofloxacin using TiO2 in a Slurry Photocatalytic Reactor: Optimization" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-4 , June 2020, URL: https://www.ijtsrd.com/papers/ijtsrd31224.pdf Paper Url :https://www.ijtsrd.com/engineering/environment-engineering/31224/photocatalytic-degradation-of-ciprofloxacin-using-tio2-in-a-slurry-photocatalytic-reactor-optimization/karthika-v
Determination of Immobilization Process Parameters of Corynebacterium glutami...IJERA Editor
The parameters of the immobilized process of Corynebacterium glutamicum on kappa carrageenan were identified by
Plackett-Burman matrix, and the experiments were designed by response surface methodology having the central
composite designs (RSM-CCD). The maximum yield of cell immobilization on kappa carrageenan carrier reached at
78% ± 2%. Optimal parameters were 3 grams kappa carrageenan per 100 militters sterile water and 58.58 million
cfu/mL, forming gels at 100C for 25 minutes and the speed when soaking particles of 150 rpm for 120 minutes in 0.58
M potassium chlorua solvent. The immobile finished products are applied in L-lysine production, their reusing ability
is 3 times and the total yield of L-lysine was accumulated 93 g/L in medium during 96 fermented hours. The L-lysine
productivity of the batch fermentation was 0.969 g.L-1
.h-1
. And the set-up storage conditions are the mixed solvent of
CaCl2 0.5% (w/v) and KCl 0.5% (w/v); pH is 7.0 in 40C. After 60 storage days, the survival cell rate was remained
51%.
Photocatalytic Degradation of Ciprofloxacin using TiO2 in a Slurry Photocatal...ijtsrd
A slurry photocatalytic reactor assessed for the degradation of ciprofloxacin CFX . The effect of operating parameters like initial ciprofloxacin concentration, catalyst dosage and pH on ciprofloxacin degradation was analysed in this study. Batch study was conducted and it showed 90 degradation of the CFX. It was observed the optimum concentration of CFX was 1500 µg l, catalyst dosage was 1 g l at the pH of 9 for the duration of 3 hours. The photocatalytic degradation of CFX followed the pseudo first order kinetics. Karthika. V | Vedavalli. S | Afreen Begum. M "Photocatalytic Degradation of Ciprofloxacin using TiO2 in a Slurry Photocatalytic Reactor: Optimization" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-4 , June 2020, URL: https://www.ijtsrd.com/papers/ijtsrd31224.pdf Paper Url :https://www.ijtsrd.com/engineering/environment-engineering/31224/photocatalytic-degradation-of-ciprofloxacin-using-tio2-in-a-slurry-photocatalytic-reactor-optimization/karthika-v
Determination of Immobilization Process Parameters of Corynebacterium glutami...IJERA Editor
The parameters of the immobilized process of Corynebacterium glutamicum on kappa carrageenan were identified by
Plackett-Burman matrix, and the experiments were designed by response surface methodology having the central
composite designs (RSM-CCD). The maximum yield of cell immobilization on kappa carrageenan carrier reached at
78% ± 2%. Optimal parameters were 3 grams kappa carrageenan per 100 militters sterile water and 58.58 million
cfu/mL, forming gels at 100C for 25 minutes and the speed when soaking particles of 150 rpm for 120 minutes in 0.58
M potassium chlorua solvent. The immobile finished products are applied in L-lysine production, their reusing ability
is 3 times and the total yield of L-lysine was accumulated 93 g/L in medium during 96 fermented hours. The L-lysine
productivity of the batch fermentation was 0.969 g.L-1
.h-1
. And the set-up storage conditions are the mixed solvent of
CaCl2 0.5% (w/v) and KCl 0.5% (w/v); pH is 7.0 in 40C. After 60 storage days, the survival cell rate was remained
51%.
Photocatalytic Degradation of a Real Textile Wastewater using Titanium Dioxid...theijes
In this study, the photocatalytic degradation of textile wastewater from Gul Ahmad textile industry in Karachi, Pakistan, using TiO2 , ZnO, and H2O2as photocatalyst was investigated. The experiments were carried out at 38 oC in astirrerbath reactor by using Ultra-Violet photo oxidation process. The degradation of wastewater using TiO2 and ZnO under various pH and using TiO2 and H2O2 were examined. Titanium dioxideand zinc oxide proved to be very effective catalysts in photocatlytic degradation of real textile industrial water. The maximum decolorization achieved was 95.29% by using TiO2 and 64.41% by using ZnO at 37 oC and pH of 9, within 150minutes of irradiations. At pH of 7.3 the maximum decolorization was 90.48%. When TiO2 was combined with H2O2 the maximum decolorization was about 86% but surprisingly within 50 minutes of the irradiation time. A higher reaction rate was found for Titanium dioxide. The results indicate that for real textile wastewater, TiO2 is comparatively more effective than ZnO. This study proves that real textile wastewater reacts differently to catalysts than aqueous solution of azo-dyes, which is associated with surface steps and sensitization of the reaction rate by presence of other contaminants in real textile wastewater.
SOLVENT EXTRACTION AND ADSORPTION TECHNIQUE FOR THE TREATMENT OF PESTICIDE EF...civej
Solvent extraction and adsorption techniques are effective methods for the removal of pesticides like DDT
and Dicofol from the waste water. Study was conducted using 3 different solvents- Ethylene dichloride
(EDC), Monochlorobenzene (MCB) and Hexane to optimise parameters like effluent to solvent ratio,
agitation speed, agitation time and settling time to attain maximum removal of pesticides by solvent
extraction process. MCB was found to be the best solvent when compared to other two solvents using the
optimised parameters. The activated carbon (8 x30) is an effective adsorbent for the removal of DDT and
Dicofol. The material have good adsorptive capacity and follows Freundlich model. The optimum
adsorbent dose was observed as 2 gm/100ml and optimum contact time needed to reach the equilibrium
was observed as 3 hr. Column study was conducted with the synthetic effluent after solvent extraction.
Combination of solvent extraction process and adsorption technique was very effective for the removal of
Dicofol and DDT with an efficiency of 99 % and 97 % respectively.
Nano porous membranes for water purification by shrinath ghadgeShrinath Ghadge
Continuous population growth and urbanization as well as rapid industrialization, causing huge contamination of potable water or underground water, has been a serious concern all over the world. Due to incompetency of conventional water purification technologies to deliver complete pollutants free water at an economical price, a high performance, cost-effective and environmentally acceptable separation system is an urgent need which should not only remove macro-, micro- and nano-pollutants but also desalinate water to a significant extent. In this milieu, nanotechnology based carbon nanotube (CNT) membranes have shown impressive breakthroughs towards water purification as compared to existing energy intensive water purification systems and thus, this technology has immense potential for large scale commercial water purification in a cost effective manner.
Photocatalytic Degradation of a Real Textile Wastewater using Titanium Dioxid...theijes
In this study, the photocatalytic degradation of textile wastewater from Gul Ahmad textile industry in Karachi, Pakistan, using TiO2 , ZnO, and H2O2as photocatalyst was investigated. The experiments were carried out at 38 oC in astirrerbath reactor by using Ultra-Violet photo oxidation process. The degradation of wastewater using TiO2 and ZnO under various pH and using TiO2 and H2O2 were examined. Titanium dioxideand zinc oxide proved to be very effective catalysts in photocatlytic degradation of real textile industrial water. The maximum decolorization achieved was 95.29% by using TiO2 and 64.41% by using ZnO at 37 oC and pH of 9, within 150minutes of irradiations. At pH of 7.3 the maximum decolorization was 90.48%. When TiO2 was combined with H2O2 the maximum decolorization was about 86% but surprisingly within 50 minutes of the irradiation time. A higher reaction rate was found for Titanium dioxide. The results indicate that for real textile wastewater, TiO2 is comparatively more effective than ZnO. This study proves that real textile wastewater reacts differently to catalysts than aqueous solution of azo-dyes, which is associated with surface steps and sensitization of the reaction rate by presence of other contaminants in real textile wastewater.
SOLVENT EXTRACTION AND ADSORPTION TECHNIQUE FOR THE TREATMENT OF PESTICIDE EF...civej
Solvent extraction and adsorption techniques are effective methods for the removal of pesticides like DDT
and Dicofol from the waste water. Study was conducted using 3 different solvents- Ethylene dichloride
(EDC), Monochlorobenzene (MCB) and Hexane to optimise parameters like effluent to solvent ratio,
agitation speed, agitation time and settling time to attain maximum removal of pesticides by solvent
extraction process. MCB was found to be the best solvent when compared to other two solvents using the
optimised parameters. The activated carbon (8 x30) is an effective adsorbent for the removal of DDT and
Dicofol. The material have good adsorptive capacity and follows Freundlich model. The optimum
adsorbent dose was observed as 2 gm/100ml and optimum contact time needed to reach the equilibrium
was observed as 3 hr. Column study was conducted with the synthetic effluent after solvent extraction.
Combination of solvent extraction process and adsorption technique was very effective for the removal of
Dicofol and DDT with an efficiency of 99 % and 97 % respectively.
Nano porous membranes for water purification by shrinath ghadgeShrinath Ghadge
Continuous population growth and urbanization as well as rapid industrialization, causing huge contamination of potable water or underground water, has been a serious concern all over the world. Due to incompetency of conventional water purification technologies to deliver complete pollutants free water at an economical price, a high performance, cost-effective and environmentally acceptable separation system is an urgent need which should not only remove macro-, micro- and nano-pollutants but also desalinate water to a significant extent. In this milieu, nanotechnology based carbon nanotube (CNT) membranes have shown impressive breakthroughs towards water purification as compared to existing energy intensive water purification systems and thus, this technology has immense potential for large scale commercial water purification in a cost effective manner.
— CdTe quantum dots (QDs)/Poly (diallyldimethylammonium chloride) (PDDA) multilayer films (QDMF) have been self-assembled by layer-by-layer (LBL) technique. CdTe quantum dots (QDs) were synthesized by using Te, NaBH 4 , and CdCl 2 as precursors and mercaptopropionic acid (MPA) as stabilizer. The as-prepared composites were characterized by transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR), UV-vis adsorption spectrum(UV-vis), and Fluorescence spectrum(FS), respectively. It was shown that the self-assembled QDMF in this study could be used as gaseous sensors for detecting organic gases, such as ammonia, acetone, methanol and formaldehyde. The quenching mechanism of CdTe QDs multilayer films by formaldehyde was studied in detail and The detection limit was 10-236ppm.
Flexible and Hydrophobic Polymeric Coatings on Cellulose Paper via Initiated ...Logan Fenimore
-Deposited flexible and hydrophobic copolymeric coatings onto cellulose paper via initiated chemical vapor deposition (iCVD) of polydivinylbenzene and poly(1,1,3,3,5,5-hexamethyl-1,5-divinyltrisiloxane)
-Studied principles and governing theories of vacuum deposition processes and vapor-phase free-radical polymerization and polymer processing techniques
-Optimized reactor conditions for deposition trials such as monomer and initiator reagent flow rates, stage and filament temperatures and reactor pressures
-Used FTIR spectroscopy to characterize coatings and contact angle goniometry to measure hydrophobicity and test thermal stability of coatings up to 90°C and mechanical stress resistance of folded papers
-Presented attached poster named "Flexible and Hydrophobic Polymeric Coatings on Cellulose Paper via Initiated Chemical Vapor Deposition (iCVD)" at Snapshots of Chemistry REU Closing Symposium
8. NPs for Water Remediation Nanoparticles Contaminant Reference Nano Zeolites Toluene, nitrogen dioxide Song et al. (2004) Carbon nanotubes (CNTs) p-nitrophenol, benzene, toluene, heavy metal ions,dimethylbenzene Jin et al. (2007) Bimetallic nanoparticles (Pd/Fe) PCBs, chlorinated methane, ethene, Trichloroethylene (TCE) Xu and Bhattacharyya (2005) Xu and Zhao (2007) Wang and Zhang (1997) Kim et al. (2010) Ni/Fe and Pd/Au nanoparticles TCE and PCBs He and Zhao (2005) TiO 2 photocatalyst Heavy metal ions Pentachlorophenol (PCP) Pena et al. (2005) Quan et al. (2005) NZVI Herbicides (Alachlor) Thompson et al. (2010) NZVI Nitrate Bezbaruah et al. (2009) NZVI TCE Bezbaruah et al. (2011)
24. Experimental Design Microorganisms Pp F1 D. BAV1 Encapsulated Microorganisms Combined NZVI-Microorganism System TCE Degradation NZVI Bare Encapsulated Encapsulated NZVI Research Phase I
30. Preparation of Capsules a : Capsules 30 mg NZVI 1.33% Iron loss Bezbaruah et al., 2011 b b : Encapsulated NZVI 4 g Maltodextrin 6 mL DI water 0.25 g CaCl 2 50 mL alginate Peristaltic pump Stirrer 6 cm b a
31.
32.
33.
34.
35. TCE Degradation Kinetics TCE degradation followed First Order Kinetics for both bare and encapsulated NZVI No significant difference Bare and Encapsulated NZVI (95% CI, Two Way ANOVA ) Bezbaruah et al., 2011 Batch Initial TCE concentration mg L -1 Reaction rate constant R 2 k obs 10 -2 min -1 k sa 10 -3 L m -2 min -1 Bare NZVI 1 2.92 1.6 0.9689 10 2.35 1.3 0.9801 30 1.53 0.8 0.9897 40 2.24 1.2 0.9868 Encapsulated NZVI 1 3.23 1.7 0.9832 10 2.45 1.3 0.9491 30 1.92 1.0 0.9921 40 2.21 1.2 0.9425
36.
37.
38.
39. Work Remaining Microorganisms Pp F1 D. BAV1 Encapsulated Microorganisms Combined NZVI-Microorganism system TCE Degradation NZVI Bare Encapsulated Encapsulated NZVI
40. Experimental Design Microorganisms Pp F1 D. BAV1 Encapsulated Microorganisms Combined NZVI-Microorganism system TCE Degradation NZVI Bare Encapsulated Encapsulated NZVI Research Phase II
42. TCE Degrading Bacteria Microorganism Method of Removal End Product Reference Pseudomonas putida F1 Direct Oxidation Co-metabolism ETH (Sun and Wood 1996); (Kim et al. 2010b); (Radway et al. 1998) Clostridium bifermentans DPH-120 Co-metabolism c-DCE (Chang et al. 2000) Dehalospirillum multivorans Direct Oxidation c-DCE (Neuman et al.1994) Dehalococcoides ethenogenes 195 Reductive dechlorination ETH (Maymo-Gatell et al. 1999), (Fennell et al. 2001) Dehalococcoides BAV1 Reductive dechlorination ETH (Krajmalnik-Brown et al. 2004; Maymo-Gatell et al. 1999),(He et al. 2003) Dehalococcoides VS Reductive dechlorination ETH (Cupples et al. 2003) Dehalococcoides FL2 Reductive dechlorination ETH (El Fantroussi et al. 1998)
47. Growth Curve- Pseudomonas putida F1 P. putida incubated at 30 o C in TSB media and shaken for 24 h 1 mL aliquot (0-24 h ) Serial dilution and nutrient agar plating Incubated for 24 h at 30 o C Plate count and plotting of Viable Cells/mL vs Time
48.
49.
50.
51.
52.
53.
54.
55.
56.
57.
58.
59. Work Remaining TCE Degradation NZVI Bare Encapsulated Encapsulated NZVI Microorganisms Pp F1 D. BAV1 Encapsulated Microorganisms Combined NZVI-microorganism system Research Phase III
63. D .BAV1 growth Studies D. BAV1 incubated at 22±2 o C in (MSM) media and shaken 1 mL aliquot at regular interval (0-36 h ) Serial dilution and nutrient agar plating Incubated for 24 h at 22±2 o C Plate count and plotting of Viable Cells/mL vs Time
Zeolites are aluminosilicate materials commonly used as adsorbents
Iron core shell --- oxidized--- electron donor (so lises e-) The organic compound is reduced
aquifer is a wet underground layer of water-bearing permeable rock
Each step Cl- is knocked out Benign product ---ethene
1.Borohydride is dropped into ferrous 2.Vaccum dried(figure a and b) 3. Agglomeration 4.XRD peak indicative of Fe0 not oxide!
2 factor: factor 1(2 treatments- – bare and encapsulated) Factor 2: (concentration) 4 concentrations –triplicates ---2 factors(bare and encapsulated) 24 experimental k values More interested in type of NZVI Difference in treatments means (k) difference in treatment means concentration!(same type of reaction) Ho- there is no difference in means of K Ha: there is a difference in means for Conc: p=o reject Ho for bare/encapsulated : p=0.211 accept ho alpha =0.05