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Title:
Optimizing acid-red 14 removal using Electro-Fenton system modified by GO@CaTiO3@WO3 Nano-composite, based on response surface methodology |
Abstract:
The present research employed the four graphite and steel electrodes in pairwise series arrangement with an Electro-Fenton system modified by the new Nano-composite of GO@CaTiO3@WO3 to treat Acid-red 14. To achieve this, response surface methodology was used to optimize parameters. In particular, four key factors; pH, Nano-composite concentration, dye concentration and time were investigated. Design-expert software analyzed the results obtained and determined the best model, which can be used to plot the response surface curves. The data indicated that under the optimal condition with initial dye concentration of 312.5 mg/L, Nanocomposite concentration of 25mg/L, pH value equal to 5 and process time is 105 minutes would result in dye removal of 89.57% and COD removal efficiency of 65.36%. Additionally, by correlation between these outcomes with kinetic models it was observed that modification in Electro-Fenton system followed pseudo- first order kinetic model (R2 =0.9829).
Keywords: Azo, Nano-composite, Electro-Fenton, response surface
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Biography:
Dr. Bita Ayati is the Associate Professor in Environmental Engineering Division of the Civil and Environmental Engineering Faculty at Tarbiat Modares University, Tehran, Iran.
She received her Ph.D. in Environmental Engineering from Tarbiat Modares University in 2005, M.Sc. in Environmental Engineering in 1998 and B.Sc. in Chemical Engineering in 1996, both from Sharif University of Technology in Tehran, Iran.
Dr. Ayati’s recent research interests include hard-biodegradable industrial and hazardous wastewater treatment especially using new methods including nano technology and advanced biological systems. She supervised 9 Ph.D. and more than 50 M.Sc. students. She is the author of the book entitled: “Application of Moving Bed Biofilm Reactor (MBBR) in Sanitary & Industrial Wastewater Treatment”. She has published over 192 papers in national and international journals and conference proceedings. She has obtained 15 scientific award including Young Scientist Awards from Man and Biosphere (MAB), UNESCO in 2002.
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