Catalytic Degradation of Methyl Blue in Wastewater by Hematite

Abstract

In this paper, catalytic degradation of simulated methyl blue in wastewater was investigated using hematite as heterogeneous catalyst in like-Fenton reaction. Through single factor experiments, the effects of the H2O2 dosage, the hematite dosage, initial pH value and reaction time on methyl blue catalytic degradation were studied. The results showed that as the amount of hematite, H2O2 dosage and reaction time increases, the degradation increases, more than a certain degradation value , the trend decreases and tends to stabilize. The optimal operating conditions determined by orthogonal experiments are as following: hematite dosage was 3g/L, H2O2 dosage was 3mL/L, and 4h at pH=9.The Fenton reaction system of hematite as heterogeneous catalyst has a wide range of pH, in the range of 3 to 11 have better removal effect, and generally more than 85%.