Decolorization and Degradation of Methyl Orange by Fenton Oxidation

摘要

The decolorization and degradation of methyl orange was investigated under a variety of reaction conditions using hydrogen peroxide and Fe~(2+) (Fenton reagent) as oxidant. The dosages of Fenton reagents, reaction time, pH value and dye concentration were all studied in detail. The results showed that the optimum conditions of methyl orange decolorization were as follows, pH at 3.0, the original H_2O_2 and Fe~(2+) concentration of 7.8mmol/L and 0.43mmol/L, respectively, and the initial dye concentration of 0.3mmol/L. The decolorization rate of methyl orange within 5 min reaction time was 90% under the optimum conditions. Therefore, it was concluded that Fenton oxidation was an effective method for decolorization of methyl orange.