Optimization of Fenton oxidation for the removal of methyl parathion in aqueous solution

Abstract

Summary In the present study, for the treatment of methyl parathion, Fenton oxidation is adopted. The aims of this study were (a) to assess the removal efficiency in terms of chemical oxygen demand (COD), (b) to scrutinize the influence of different parameters: initial pH, concentrations of H 2 O 2 and Fe 2+ and, (c) response surface methodology (RSM) was used to design the Fenton process. Three-level central composite design (CCD) was applied in designing the experiments to observe the effects of most important operating factors. The enactment of the model was judged with the analysis of variance (ANOVA). A quadratic model was used to represent the experimental data. The predicted values and experimental values were found to be in good agreement with the ( R 2 = 0.9891 and Adj- R 2 = 0.9877), which define the propriety of the model. The characteristic of methyl parathion bearing wastewater was concentration 30 mg/L, COD 440 mg/L, pH 6.5. Maximum removal efficiency was perceived at acidic pH value 3.