Diethyl phthalate (DEP) is a class of phthalates. As a widely used plasticizer, DEP has been extensively detected in different environmental systems, which would affect the reproduction of living organisms. In this study, both kinetic characteristics and influencing factors of DEP degradation by Fe2+/S2O82− system were studied. The results showed that the initial pH value, S2O82−, Fe2+, DEP had effects on degradation efficiency of DEP. When the pH value was 3.0, the concentration of DEP was 50 μmol/L, the concentration of Fe2+ was 100 μmol/L and the concentration of S2O82− was 500 μmol/L, the degradation efficiency of DEP was 98%. Increasing the concentrations of Fe2+ and S2O82− were beneficial to the removal of target chemicals. The Behnajady-Modirshahla-Ghanbery (BMG) kinetic model were fit to describe the Fe2+/S2O82− method for low-concentration DEP removal. The 1/m in BMG kinetic model had a good correlation with the initial concentrations of Fe2+, DEP, S2O82− and pH. As far as we know, this was the first report of BMG kinetic model for ferrous ion-activated persulfate degradation of Phthalates.
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