Decolorization of dye wastewater containing Reactive Red 239 by Fenton process

Abstract

The main objective of this work was to study the decolorization of the azo dye Reactive Red 239 (RR239) in aqueous solution using Fenton process. Effects of various experimental parameters of the oxidation reaction of the dye were investigated. The parameters studied were the initial pH, the initial concentrations of ferrous (Fe²⁺) and hydrogen peroxide (H₂O₂). The results showed that the optimal condition was experimentally determined and it was found to be initial pH was 3, initial H₂O₂ and Fe²⁺ concentration were 2.7 mM and 0.25 mM, respectively, for initial dye concentration was 100 mg/L at temperature room. Under optimal conditions, 96.9% degradation efficiency of dye in aqueous solution was achieved after 30 min of reaction.