Abstract
The photo-catalytic degradation of an azo dye - Amaranth (AM) - has been investigated in TiO{sub 2}/UV aqueous suspensions. The results obtained from the experiments during H{sub 2}O{sub 2}/TiO{sub 2} addition show that the highest decolorization rate is provided by the combination of (UV + TiO{sub 2} + H{sub 2}O{sub 2}). The decolorization efficiencies were 17%, 26%, 38% and 64% in the runs UV, UV + H{sub 2}O{sub 2}, UV + TiO{sub 2} and (UV + TiO{sub 2} + H{sub 2}O{sub 2}) after approximately 100 min illumination periods, respectively. The observed dye degradation rates followed pseudo-first order kinetics with respect to the substrate concentration under the experimental conditions used. Different experimental conditions, such as temperature, pH and presence of electron acceptor were investigated. The temperature effect was investigated at the range of 293-313 K and it was observed that decolorization rate increased by the increase in temperature. Chemical oxygen demand and dye absorbance of the photodegraded dye solution substantially decreased. Effect of pH was also investigated and it was observed that the lower the pH the higher the degradation. In addition, an enhancement in the photodegradation rate was observed by the addition of hydrogen peroxide as an electron acceptor. The
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Gupta, Vinod K., E-mail: vinodfcy@gmail.com [Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667 (India);
Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261 (Saudi Arabia)];
Jain, Rajeev;
[1]
Mittal, Alok;
[2]
Saleh, Tawfik A;
[3]
Nayak, Arunima;
[4]
Agarwal, Shilpi;
Sikarwar, Shalini
[1]
- School of Studies in Chemistry, Jiwaji University, Gwalior 474011 (India)
- Department of Chemistry, Maulana Azad National Institute of Technology (A Deemed University), Bhopal, 462 051 (India)
- Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261 (Saudi Arabia)
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667 (India)
Citation Formats
Gupta, Vinod K., E-mail: vinodfcy@gmail.com [Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667 (India), Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261 (Saudi Arabia)], Jain, Rajeev, Mittal, Alok, Saleh, Tawfik A, Nayak, Arunima, Agarwal, Shilpi, and Sikarwar, Shalini.
Photo-catalytic degradation of toxic dye amaranth on TiO{sub 2}/UV in aqueous suspensions.
Netherlands: N. p.,
2012.
Web.
doi:10.1016/J.MSEC.2011.08.018.
Gupta, Vinod K., E-mail: vinodfcy@gmail.com [Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667 (India), Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261 (Saudi Arabia)], Jain, Rajeev, Mittal, Alok, Saleh, Tawfik A, Nayak, Arunima, Agarwal, Shilpi, & Sikarwar, Shalini.
Photo-catalytic degradation of toxic dye amaranth on TiO{sub 2}/UV in aqueous suspensions.
Netherlands.
https://doi.org/10.1016/J.MSEC.2011.08.018
Gupta, Vinod K., E-mail: vinodfcy@gmail.com [Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667 (India), Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261 (Saudi Arabia)], Jain, Rajeev, Mittal, Alok, Saleh, Tawfik A, Nayak, Arunima, Agarwal, Shilpi, and Sikarwar, Shalini.
2012.
"Photo-catalytic degradation of toxic dye amaranth on TiO{sub 2}/UV in aqueous suspensions."
Netherlands.
https://doi.org/10.1016/J.MSEC.2011.08.018.
@misc{etde_22058404,
title = {Photo-catalytic degradation of toxic dye amaranth on TiO{sub 2}/UV in aqueous suspensions}
author = {Gupta, Vinod K., E-mail: vinodfcy@gmail.com [Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667 (India), Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261 (Saudi Arabia)], Jain, Rajeev, Mittal, Alok, Saleh, Tawfik A, Nayak, Arunima, Agarwal, Shilpi, and Sikarwar, Shalini}
abstractNote = {The photo-catalytic degradation of an azo dye - Amaranth (AM) - has been investigated in TiO{sub 2}/UV aqueous suspensions. The results obtained from the experiments during H{sub 2}O{sub 2}/TiO{sub 2} addition show that the highest decolorization rate is provided by the combination of (UV + TiO{sub 2} + H{sub 2}O{sub 2}). The decolorization efficiencies were 17%, 26%, 38% and 64% in the runs UV, UV + H{sub 2}O{sub 2}, UV + TiO{sub 2} and (UV + TiO{sub 2} + H{sub 2}O{sub 2}) after approximately 100 min illumination periods, respectively. The observed dye degradation rates followed pseudo-first order kinetics with respect to the substrate concentration under the experimental conditions used. Different experimental conditions, such as temperature, pH and presence of electron acceptor were investigated. The temperature effect was investigated at the range of 293-313 K and it was observed that decolorization rate increased by the increase in temperature. Chemical oxygen demand and dye absorbance of the photodegraded dye solution substantially decreased. Effect of pH was also investigated and it was observed that the lower the pH the higher the degradation. In addition, an enhancement in the photodegradation rate was observed by the addition of hydrogen peroxide as an electron acceptor. The adsorption trends of Amaranth at various initial concentrations followed the Langmuir isotherm trend. This work adds to the global discussion on the role of the advanced oxidation processes in water treatment. - Graphical abstract: Variation of rate constant with pH Highlights: Black-Right-Pointing-Pointer UV light and TiO2 photo-catalysts can be efficiently applied for the degradation. Black-Right-Pointing-Pointer The degradation system followed pseudo first-order kinetics. Black-Right-Pointing-Pointer The reduction in COD of the effluent was observed. Black-Right-Pointing-Pointer The method is versatile, economic, eco-friendly and efficient.}
doi = {10.1016/J.MSEC.2011.08.018}
journal = []
issue = {1}
volume = {32}
journal type = {AC}
place = {Netherlands}
year = {2012}
month = {Jan}
}
title = {Photo-catalytic degradation of toxic dye amaranth on TiO{sub 2}/UV in aqueous suspensions}
author = {Gupta, Vinod K., E-mail: vinodfcy@gmail.com [Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667 (India), Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261 (Saudi Arabia)], Jain, Rajeev, Mittal, Alok, Saleh, Tawfik A, Nayak, Arunima, Agarwal, Shilpi, and Sikarwar, Shalini}
abstractNote = {The photo-catalytic degradation of an azo dye - Amaranth (AM) - has been investigated in TiO{sub 2}/UV aqueous suspensions. The results obtained from the experiments during H{sub 2}O{sub 2}/TiO{sub 2} addition show that the highest decolorization rate is provided by the combination of (UV + TiO{sub 2} + H{sub 2}O{sub 2}). The decolorization efficiencies were 17%, 26%, 38% and 64% in the runs UV, UV + H{sub 2}O{sub 2}, UV + TiO{sub 2} and (UV + TiO{sub 2} + H{sub 2}O{sub 2}) after approximately 100 min illumination periods, respectively. The observed dye degradation rates followed pseudo-first order kinetics with respect to the substrate concentration under the experimental conditions used. Different experimental conditions, such as temperature, pH and presence of electron acceptor were investigated. The temperature effect was investigated at the range of 293-313 K and it was observed that decolorization rate increased by the increase in temperature. Chemical oxygen demand and dye absorbance of the photodegraded dye solution substantially decreased. Effect of pH was also investigated and it was observed that the lower the pH the higher the degradation. In addition, an enhancement in the photodegradation rate was observed by the addition of hydrogen peroxide as an electron acceptor. The adsorption trends of Amaranth at various initial concentrations followed the Langmuir isotherm trend. This work adds to the global discussion on the role of the advanced oxidation processes in water treatment. - Graphical abstract: Variation of rate constant with pH Highlights: Black-Right-Pointing-Pointer UV light and TiO2 photo-catalysts can be efficiently applied for the degradation. Black-Right-Pointing-Pointer The degradation system followed pseudo first-order kinetics. Black-Right-Pointing-Pointer The reduction in COD of the effluent was observed. Black-Right-Pointing-Pointer The method is versatile, economic, eco-friendly and efficient.}
doi = {10.1016/J.MSEC.2011.08.018}
journal = []
issue = {1}
volume = {32}
journal type = {AC}
place = {Netherlands}
year = {2012}
month = {Jan}
}