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A Riga - One of the best experts on this subject based on the ideXlab platform.
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effect of system parameters and of inorganic salts on the Decolorization and degradation of procion h exl dyes comparison of h2o2 uv fenton uv fenton tio2 uv and tio2 uv h2o2 processes
Desalination, 2007Co-Authors: A Riga, K Soutsas, K Ntampegliotis, V Karayannis, G PapapolymerouAbstract:Abstract Reactive dyes are extensively used in the last years due to their superior performance, but they are environmentally hazardous. In the present work, the Decolorization and degradation of commercial reactive azo dyes (Procion Navy H-exl, Procion Crimson H-exl and Procion Yellow H-exl) were studied using five advanced oxidation processes (AOPs): H2O2/UV, Fenton, UV/Fenton, TiO2/UV and TiO2/UV/H2O2. The dependence of the Decolorization on the system parameters (solution pH, dye and reactants initial concentrations, and TiO2 loading) and on the presence of salts (NaCl, Na2CO3, NaHCO3, Na2SO4, NaNO3 and Na3PO4) was investigated. The Decolorization (determined by spectrophotometric analysis) and the degradation (determined as TOC reduction) were compared for the different processes examined. The Decolorization of the Procion H-exl solutions considered was found to strongly depend on the system parameters in all five AOPs. Although Decolorization is very fast for the Fenton process and becomes even faster for the UV/Fenton process, degradation rates are relatively low for these two methods. Addition of H2O2 increases the Decolorization and especially the degradation rates for the TiO2/UV process. The H2O2/UV and TiO2/UV/H2O2 processes result in the fastest dye degradation. The addition of the salts examined has in general an adverse effect on the Decolorization rates, but to a varying degree depending on the salt used.
Mayur B Kurade - One of the best experts on this subject based on the ideXlab platform.
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Decolorization of textile industry effluent using immobilized consortium cells in upflow fixed bed reactor
Journal of Cleaner Production, 2019Co-Authors: Mayur B Kurade, Tatoba R Waghmode, Jiu Qiang Xiong, Sanjay P Govindwar, Byonghun JeonAbstract:Abstract Textile dyes are xenobiotic contaminants which pose a potential risk on the ecosystem upon their disposal to the water bodies. This study evaluated the efficiencies of different immobilization matrices for its utilization in a reactor with continuous mode operation for Decolorization of textile effluent. An effective consortium of bacteria (Brevibacillus laterosporus) and yeast (Galactomyces geotrichum) were immobilized in different support matrices including calcium alginate, polyvinyl alcohol, stainless steel sponge and polyurethane foam to investigate the Decolorization of a model azo dye, Remazol red and textile industry effluent. The microbial consortia immobilized in stainless steel sponge and polyurethane foam exhibited 100% Decolorization of 50 mg L−1 Remazol red in 11 and 15 h, respectively; however, calcium alginate and polyvinyl alcohol required considerably more time (20 and 24 h, respectively) for complete Decolorization. Among all the matrices, The calcium alginate, stainless steel sponge and polyurethane foam showed >95% Decolorization of textile industry effluent within 48 h. The calcium alginate and polyvinyl alcohol exhibited stable performance of Decolorization with its repeated use for 5 cycles with >76% Decolorization. An upflow fixed bed reactor (total volume- 215 mL) packed with the immobilized cells of consortium onto stainless steel sponge attained ∼90% Decolorization of textile industry effluent in continuous operation at 10 mL h−1. The Decolorization efficiency of the reactor was well maintained (>90%) when the reactor was used repeatedly for three cycles. The overall results indicated that immobilized mixed consortium cells can be considered as an effective tool for its potential application in removal of xenobiotic textile dyes from the textile industry wastewater with >90% of Decolorization efficiency.
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monitoring the gradual biodegradation of dyes in a simulated textile effluent and development of a novel triple layered fixed bed reactor using a bacterium yeast consortium
Chemical Engineering Journal, 2017Co-Authors: Mayur B Kurade, Tatoba R Waghmode, Byonghun Jeon, Swapnil M Patil, Sanjay P GovindwarAbstract:Abstract Textile industry effluents contain a variety of dyes, which are normally resistant to biodegradation. A bacterial-yeast consortium ( Brevibacillus laterosporus and Galactomyces geotrichum ) was used for Decolorization of two real textile effluents (RTE) and a simulated synthetic effluent (SSE). It showed enhanced Decolorization compared to that of individual microorganisms with Decolorization efficiency of 89, 60 and 69% for RTE-1, RTE-2 and SSE respectively, within 48 h. The cumulative action of oxido-reductive enzyme in the consortium was responsible for improved Decolorization. Spectroscopic analysis suggested effective biodegradation of dyes present in the SSE by the consortium contrarily to the individual strains. The gradual biodegradation of each dye present in the SSE was monitored using high performance thin layer chromatography (HPTLC). The consortium biodegraded all of the dyes within 1 h as compared to that of partial biodegradation by the individual microorganisms. A novel, triple layered fixed bed reactor was designed for continuous Decolorization of effluent. It showed >80% Decolorization (at 100 mL h −1 flow-rate), for a period of 7 days, along with ∼78% reduction in COD. The reproducibility of the bioreactor could be maintained for three consecutive cycles (7 days each).
Sanjay P Govindwar - One of the best experts on this subject based on the ideXlab platform.
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Decolorization of textile industry effluent using immobilized consortium cells in upflow fixed bed reactor
Journal of Cleaner Production, 2019Co-Authors: Mayur B Kurade, Tatoba R Waghmode, Jiu Qiang Xiong, Sanjay P Govindwar, Byonghun JeonAbstract:Abstract Textile dyes are xenobiotic contaminants which pose a potential risk on the ecosystem upon their disposal to the water bodies. This study evaluated the efficiencies of different immobilization matrices for its utilization in a reactor with continuous mode operation for Decolorization of textile effluent. An effective consortium of bacteria (Brevibacillus laterosporus) and yeast (Galactomyces geotrichum) were immobilized in different support matrices including calcium alginate, polyvinyl alcohol, stainless steel sponge and polyurethane foam to investigate the Decolorization of a model azo dye, Remazol red and textile industry effluent. The microbial consortia immobilized in stainless steel sponge and polyurethane foam exhibited 100% Decolorization of 50 mg L−1 Remazol red in 11 and 15 h, respectively; however, calcium alginate and polyvinyl alcohol required considerably more time (20 and 24 h, respectively) for complete Decolorization. Among all the matrices, The calcium alginate, stainless steel sponge and polyurethane foam showed >95% Decolorization of textile industry effluent within 48 h. The calcium alginate and polyvinyl alcohol exhibited stable performance of Decolorization with its repeated use for 5 cycles with >76% Decolorization. An upflow fixed bed reactor (total volume- 215 mL) packed with the immobilized cells of consortium onto stainless steel sponge attained ∼90% Decolorization of textile industry effluent in continuous operation at 10 mL h−1. The Decolorization efficiency of the reactor was well maintained (>90%) when the reactor was used repeatedly for three cycles. The overall results indicated that immobilized mixed consortium cells can be considered as an effective tool for its potential application in removal of xenobiotic textile dyes from the textile industry wastewater with >90% of Decolorization efficiency.
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monitoring the gradual biodegradation of dyes in a simulated textile effluent and development of a novel triple layered fixed bed reactor using a bacterium yeast consortium
Chemical Engineering Journal, 2017Co-Authors: Mayur B Kurade, Tatoba R Waghmode, Byonghun Jeon, Swapnil M Patil, Sanjay P GovindwarAbstract:Abstract Textile industry effluents contain a variety of dyes, which are normally resistant to biodegradation. A bacterial-yeast consortium ( Brevibacillus laterosporus and Galactomyces geotrichum ) was used for Decolorization of two real textile effluents (RTE) and a simulated synthetic effluent (SSE). It showed enhanced Decolorization compared to that of individual microorganisms with Decolorization efficiency of 89, 60 and 69% for RTE-1, RTE-2 and SSE respectively, within 48 h. The cumulative action of oxido-reductive enzyme in the consortium was responsible for improved Decolorization. Spectroscopic analysis suggested effective biodegradation of dyes present in the SSE by the consortium contrarily to the individual strains. The gradual biodegradation of each dye present in the SSE was monitored using high performance thin layer chromatography (HPTLC). The consortium biodegraded all of the dyes within 1 h as compared to that of partial biodegradation by the individual microorganisms. A novel, triple layered fixed bed reactor was designed for continuous Decolorization of effluent. It showed >80% Decolorization (at 100 mL h −1 flow-rate), for a period of 7 days, along with ∼78% reduction in COD. The reproducibility of the bioreactor could be maintained for three consecutive cycles (7 days each).
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Decolorization and detoxification of sulfonated azo dye methyl orange by kocuria rosea mtcc 1532
Journal of Hazardous Materials, 2010Co-Authors: Ganesh K Parshetti, Dayanand Kalyani, Amar A Telke, Sanjay P GovindwarAbstract:Abstract Kocuria rosea (MTCC 1532) showed 100% Decolorization of methyl orange (50 mg l−1) under static condition. The optimum pH and temperature for dye Decolorization was 6.8 and 30 °C, respectively. The K. rosea (MTCC 1532) showed maximum Decolorization of methyl orange when growth medium containing yeast extract as compared to other substrates. The culture exhibited significant ability to decolorize repeated additions of dye, with reduction in time up to 12 h at eighth dye aliquot addition. Significant induction of reductases (NADH-DCIP reductase and azoreductase) suggests its involvement in Decolorization of methyl orange. The metabolites formed after Decolorization of methyl orange, such as 4-amino sulfonic acid and N,N′-dimethyl p-phenyldiamine were characterized using FTIR and MS. Phytotoxicity and microbial toxicity study showed the methyl orange was toxic and metabolites obtained after its Decolorization was nontoxic for experimental plants (Triticum aestivum and Phaseolus mungo) and bacteria (K. rosea, Pseudomonas aurugenosa and Azatobacter vinelandii).
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influence of organic and inorganic compounds on oxidoreductive Decolorization of sulfonated azo dye c i reactive orange 16
Journal of Hazardous Materials, 2009Co-Authors: Amar A Telke, Dayanand Kalyani, Vishal V Dawkar, Sanjay P GovindwarAbstract:Abstract An isolated bacterial strain is placed in the branch of the Bacillus genus on the basis of 16S rRNA sequence and biochemical characteristics. It decolorized an individual and mixture of dyes, including reactive, disperse and direct. Bacillus sp. ADR showed 88% Decolorization of sulfonated azo dye C.I. Reactive Orange 16 (100 mg L−1) with 2.62 mg of dye decolorized g−1 dry cells h−1 as specific Decolorization rate along with 50% reduction in COD under static condition. The optimum pH and temperature for the Decolorization was 7–8 and 30–40 °C, respectively. It was found to tolerate the sulfonated azo dye concentration up to 1.0 g L−1. Significant induction in the activity of an extracellular phenol oxidase and NADH–DCIP reductase enzymes during Decolorization of C.I. Reactive Orange 16 suggest their involvement in the Decolorization. The metal salt (CaCl2), stabilizers (3,4-dimethoxy benzyl alcohol and o-tolidine) and electron donors (sodium acetate, sodium formate, sodium succinate, sodium citrate and sodium pyruvate) enhanced the C.I. Reactive Orange 16 Decolorization rate of Bacillus sp. ADR. The 6-nitroso naphthol and dihydroperoxy benzene were final products obtained after Decolorization of C.I. Reactive Orange 16 as characterized using FTIR and GC–MS.
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influence of organic and inorganic compounds on oxidoreductive Decolorization of sulfonated azo dye c i reactive orange 16
Journal of Hazardous Materials, 2009Co-Authors: Amar A Telke, Dayanand Kalyani, Vishal V Dawkar, Sanjay P GovindwarAbstract:An isolated bacterial strain is placed in the branch of the Bacillus genus on the basis of 16S rRNA sequence and biochemical characteristics. It decolorized an individual and mixture of dyes, including reactive, disperse and direct. Bacillus sp. ADR showed 88% Decolorization of sulfonated azo dye C.I. Reactive Orange 16 (100 mg L(-1)) with 2.62 mg of dye decolorized g(-1) dry cells h(-1) as specific Decolorization rate along with 50% reduction in COD under static condition. The optimum pH and temperature for the Decolorization was 7-8 and 30-40 degrees C, respectively. It was found to tolerate the sulfonated azo dye concentration up to 1.0 g L(-1). Significant induction in the activity of an extracellular phenol oxidase and NADH-DCIP reductase enzymes during Decolorization of C.I. Reactive Orange 16 suggest their involvement in the Decolorization. The metal salt (CaCl2), stabilizers (3,4-dimethoxy benzyl alcohol and o-tolidine) and electron donors (sodium acetate, sodium formate, sodium succinate, sodium citrate and sodium pyruvate) enhanced the C.I. Reactive Orange 16 Decolorization rate of Bacillus sp. ADR. The 6-nitroso naphthol and dihydroperoxy benzene were final products obtained after Decolorization of C.I. Reactive Orange 16 as characterized using FTIR and GC-MS.
G Papapolymerou - One of the best experts on this subject based on the ideXlab platform.
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effect of system parameters and of inorganic salts on the Decolorization and degradation of procion h exl dyes comparison of h2o2 uv fenton uv fenton tio2 uv and tio2 uv h2o2 processes
Desalination, 2007Co-Authors: A Riga, K Soutsas, K Ntampegliotis, V Karayannis, G PapapolymerouAbstract:Abstract Reactive dyes are extensively used in the last years due to their superior performance, but they are environmentally hazardous. In the present work, the Decolorization and degradation of commercial reactive azo dyes (Procion Navy H-exl, Procion Crimson H-exl and Procion Yellow H-exl) were studied using five advanced oxidation processes (AOPs): H2O2/UV, Fenton, UV/Fenton, TiO2/UV and TiO2/UV/H2O2. The dependence of the Decolorization on the system parameters (solution pH, dye and reactants initial concentrations, and TiO2 loading) and on the presence of salts (NaCl, Na2CO3, NaHCO3, Na2SO4, NaNO3 and Na3PO4) was investigated. The Decolorization (determined by spectrophotometric analysis) and the degradation (determined as TOC reduction) were compared for the different processes examined. The Decolorization of the Procion H-exl solutions considered was found to strongly depend on the system parameters in all five AOPs. Although Decolorization is very fast for the Fenton process and becomes even faster for the UV/Fenton process, degradation rates are relatively low for these two methods. Addition of H2O2 increases the Decolorization and especially the degradation rates for the TiO2/UV process. The H2O2/UV and TiO2/UV/H2O2 processes result in the fastest dye degradation. The addition of the salts examined has in general an adverse effect on the Decolorization rates, but to a varying degree depending on the salt used.
V Karayannis - One of the best experts on this subject based on the ideXlab platform.
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effect of system parameters and of inorganic salts on the Decolorization and degradation of procion h exl dyes comparison of h2o2 uv fenton uv fenton tio2 uv and tio2 uv h2o2 processes
Desalination, 2007Co-Authors: A Riga, K Soutsas, K Ntampegliotis, V Karayannis, G PapapolymerouAbstract:Abstract Reactive dyes are extensively used in the last years due to their superior performance, but they are environmentally hazardous. In the present work, the Decolorization and degradation of commercial reactive azo dyes (Procion Navy H-exl, Procion Crimson H-exl and Procion Yellow H-exl) were studied using five advanced oxidation processes (AOPs): H2O2/UV, Fenton, UV/Fenton, TiO2/UV and TiO2/UV/H2O2. The dependence of the Decolorization on the system parameters (solution pH, dye and reactants initial concentrations, and TiO2 loading) and on the presence of salts (NaCl, Na2CO3, NaHCO3, Na2SO4, NaNO3 and Na3PO4) was investigated. The Decolorization (determined by spectrophotometric analysis) and the degradation (determined as TOC reduction) were compared for the different processes examined. The Decolorization of the Procion H-exl solutions considered was found to strongly depend on the system parameters in all five AOPs. Although Decolorization is very fast for the Fenton process and becomes even faster for the UV/Fenton process, degradation rates are relatively low for these two methods. Addition of H2O2 increases the Decolorization and especially the degradation rates for the TiO2/UV process. The H2O2/UV and TiO2/UV/H2O2 processes result in the fastest dye degradation. The addition of the salts examined has in general an adverse effect on the Decolorization rates, but to a varying degree depending on the salt used.
