Distribution of Fe(il) Concentration during Degradation of Rhodamine B by Fenton Reagent

摘要

The effects of reaction conditions including Fe~(2+), H_2O_2, oxalic acid, and humic acid dosages were discussed on the Fenton degradation of rhodamine B (RB). The optimal reaction conditions of Fenton reaction were 0.15 mM Fe~(2+), 5 mM H_2O_2, and pH 3.0, and the decolorization rate RB (10 mg/L) reached 97.8% after 30min catalytic degradation. The changes of Fe~(2+) concentrations in Fenton system has been focused on in this work. A relatively low concentration of Fe~(2+) was maintained during reaction process when Fe~(2+) and H_2O_2 were added with high concentration, and thus RB was degraded quickly.