Catalytic Oxidation Of Sulfite With Iron Based Catalysts And Degradation Of Organic Dyes In Wastewater

In recent years, advanced oxidation technology(AOPs) is widely used in the removal of organic pollutants. Fenton and persulfate have been regarded as one of the most economic, efficient and promising technology used for wastewater treatment. Sulfurous acid root which is an common reducing agent can also produce strong oxidizing radicals during oxidation. In this study, the properties and mechanism when sulfites that are catalyzed by Fe(II) activated oxygen for treating dye wastewater of low concentration has been studied.The process for decolorizing methyl orange and also the intermediate products have been investigated in the report. It was found that several azo dyes can be recolorized by Fe(II)/sulfite, the degradation of Methyl Orange reached 59.05% in 10 min. Some other products have been detected according to the MS.. It was suggested from electron spin resonance spin-trapping technologies and radical scavenging measurements that the produced sulfate radicals were to be responsible for the dye decolonization. This study provided us a simple, effective and economical system ideal for the use of sulfite in AOPs.