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In this study, the role of electrochemical oxidation processes, inc­luding the electro-Fenton, the electro-persulfate (PS), and the electro/FeII/PS pro­cesses, in the removal of Basic Red 18 (BR18) from aqueous solutions was investigated. It was found that the electro-PS process successfully removes col­our, but after 5 h, it produced only 75 % mineralization. In the same conditions, more effective mineralization was achieved by the electro/FeII/PS process than by the electro-Fenton method. At pH levels of 3.0 and 5.7, very effective min­eral­ization results were produced by the electro/FeII/PS process. Moreover, the maximum mineralization current efficiency values were obtained by the elec­tro/FeII/PS process. T he mineralization efficiency of the electro/FeII/PS pro­cess was determined to be 97 % under the following conditions: BR18 initial dye concentration of 100 mg L - 1 , pH of 5.7, contact time of 5 h, PS concen­tration of 10 mM, Fe 2+ concentration of 0.2 mM, and a sodium sulfate concen­tration of 0.05 M.

Comparative mineralization of Basic Red 18 with electrochemical advanced oxidation processes