Decolorization of the Textile Wastewater Containing Reactive Blue 19 Dye by Fenton and Photo-Fenton Oxidation

Abstract

AbstractThe decolorization of the synthetic dye solution containing reactive blue 19 dye was performed by the Fenton and the photo-Fenton processes. The effect of the dose of the hydrogen peroxide and the ferrous ions and the solution pH on the rate of decolorization was studied and the optimum conditions were obtained. The maximum color reductions of 93.3 and 97.5% were obtained after 360 min of oxidation at the optimum conditions (solution pH 3, H2O2 50 mg/L, Fe2+ 4 mg/L) by the Fenton and the photo-Fenton processes, respectively. The experimental data were analyzed using the first-order, second-order and Behnajady-Modirshahla-Ghanbery (BMG) kinetic models, and the kinetic data were in good agreement with the BMG model. Experiments were also performed to treat the real textile industry effluent containing the reactive blue 19 dye, and the color reductions of 84 and 97% was obtained after 540 min of the treatment by the Fenton and the photo-Fenton processes, respectively.