Removal of methylene blue by Advanced Oxidation using Fenton’s reagent and Microfiltration

Abstract

In recent years, hybrid processes are being studied for waste water treatment. In the present work, advanced oxidation process (AOP) with Fenton’s reagent followed by microfiltration (MF)is studied for the removal of methylene blue dye from the wastewater to save time, energy and cost. Fenton’s reagent was responsible for the complete degradation of the dye. The optimal composition of the Fenton’s reagent for the degradation of 100 mg/L methylene blue dye was 20 mg/L H2O2 and 500 mg/L FeSO4.7H2O. The pH was maintained 3 during the treatment. A microfiltration membrane with an average pore size of 0.60 μm was used to remove the oxidation products at transmembrane pressures of 30, 40 and 50 psi. After the hybrid treatment, no dye or dispersed particles were found in the permeate solution. Thus 100% removal of the dye was achieved.