Decolorization of acid dye using sono-based processes: sonoelectrochemical, sonophotoelectrochemical and sonophotoelectrocatalysis


Journal: Vol.7, No.2, Spring 2014 - Article 4   Pages :   Until 



Article Code:
PCCC-05-11-2012-213

Authors:
Mohammad Ebrahim Olya: Institute for Color Science and Technology - Department of Environmental Research
Azam Pirkarami: Institute for Color Science and Technology - Department of Environmental Research
Majid Soleimani: Imam Khomeini International University - Department of Chemistry
Narges Yousefi Limaee: Institute for Color Science and Technology - Department of Environmental Research


Article's abstract:

In recent years, combinatorial methods have attracted a great deal of attention. Among them, sono-combining techniques have shown a significant potential as an economic technology applicable and environment-friendly technology for wastewater treatment. In this study, Sono Electrochemical SE, Sono Photo Electrochemical SPE and Sono Photo Electro Catalytic SPEC techniques were investigated for decolorization of Acid Red 88 AR88. It was found that SPEC is capable of decolorizing AR88 entirely after 35minutes by using Ni-TiO2 as a catalyst with higher efficiency than SPE and SE techniques. The results are also shown that SPE had more yield than SE because in the case of SPE, the process was performed not only by sonolysis but also by photoelectrolysis. Furthermore, initial concentration of dye, initial pH, current density and concentration of supporting electrolyte were investigated and the optimum conditions were obtained. Based on the obtained results, SPEC is an appropriate technology for decolorizing


Keywords:
Acid Red 88, Ni-TiO2 catalyst, Decolorization, Sonoelectrochemical, Sonophotoelectrochemical, Sonophotoelectrocatalysis

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