Optimization of Electro-proxone Via Response Surface Statistical Model in Decolorization of Acid Orange 7 Dye from Synthetic Wastewater

Mehralipour, J.; Dayari, A.; Rezaei Vahidian, H.; Samarghandi, M.; Azizi, F.

Optimization of Electro-proxone Via Response Surface Statistical Model in Decolorization of Acid Orange 7 Dye from Synthetic Wastewater

Authors

¹ Department of Environmental Engineering, Hamadan University of Medical Sciences

² Department of Environmental Engineering, Hamadan University of Medical Scienes

³ Department of chemistry, malek ashtar university of technology

Abstract

Electro-proxone process is combination of ozonation process and electrolysis that to produce the hydroxyl radical. The aim of this study was to optimization of Electro-proxone process via response surface statistical model in decolonization of Acid Orange 7 dye from synthetic wastewater. In this study was used semi-batch reactor via four graphite electrodes by 2×10 cm dimension. The effect of pH (2-4), concentration of ozone gas (2-4 gr/hr.L), direct electric current (2-4 A), reaction time (15-30 min) parameters via response surface statistical model was investigated. Measuring of Acid Orange 7 dye with DR6000 and measuring of COD and TOC according to methods that presented in standard methods for the examination of water and wastewater book. The results indicates proper performance of this process in decolonization of dye and COD and TOC removal. Performance of process in optimum condition is pH=3/50, direct electric current=3/4A, concentration of ozone gas is 3/64 gr/hr.L and reaction time is 30 minute in 100 mg/L initial concentration of dye. In this condition efficiency of process obtained 86/42%. The process efficiency in COD and TOC removal in 60 minute to the maximum amount reached. The Electro-proxone process as a choices of advance oxidation process have good ability to decrease of dye industrial pollutants.

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