Decolorization of methylene blue dye wastewater by Fenton's reagent

摘要

Using·OH from Fenton's reagent, the strong oxidation treatment of methylene blue dye wastewater can destruct the chromophore in organic compounds, and yield CO_2, H_2O and small molecule inorganic compounds by oxidative degradation finally. The influence of Fenton's reagent dosage, initial pH, and reaction time on the degradation effect was studied. The experimental results show that the decolorization rate of 100 mL 20 mg/L methylene blue dye wastewater can achieve 96% in the conditions of 0.02 g FeSO_4·7H_2O, 1 mL 30% H_2O_2, initial pH at 3.0～4.0, reaction time is 30 min, at room temperature. This treatment of dye wastewater is easy to operate and with good effect.