Degradation of Methylene Blue by Fenton-Like Reaction

Abstract

In order to enhance the catalytic activity of the heterogeneous Fenton-like reaction, the catalyst of Fe3O4 composites was synthesized. The Fe3O4 was used as catalyst of the heterogeneous Fenton-like reaction to degrade methylene blue in aqueous solution. The influencing factors, such as pH, initial H2O2 concentration, dye concentration and catalyst concentration, were investigated. The results showed that the dye was effectively degraded at pH 3-8. The optimal condition was at pH3.5. The degradation efficiency of dye increased with the increase of the initial H2O2 concentration and reached maximum when the H2O2 concentration was 15 mmol/L. The degradation efficiency of dye increased with the catalyst concentration was 650 mg/L. The coexisted anions decreased the degradation efficiency of dye.