COD and color removal from synthetic textile wastewater by ultrasound assisted electro-Fenton oxidation process

Combination of electro-Fenton (EF) oxidation process with sonication for both the degradation of C.I. Reactive Black 5 (RB 5) and removal of chemical oxygen demand (COD) from synthetic textile wastewater was investigated under different operating conditions. Optimal conditions were found as the initial pH of 3, DC current of 0.25 A, H2O2 dosage of 800 mg/L and electrode distance of 2.5 cm for both EF and ultrasound assisted electro-Fenton (sono-EF) processes. However, the combination of EF with sonication was negligibly improved in terms of COD and color removals, compared to EF process. (c) 2012 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.