| In this paper, propylene glycol (PG) was treated by continuously adding two solutions of ferrous sulfate (FeSO4) and hydrogen peroxide (H2O2). The effect of different operational variables, such as the molar ratio of H2O2 to PG, the molar ratio of Fe2+ to PG, the dropping time of H2O2 and Fe2+, reaction time after dropping, temperature, and initial pH were investigated, respectively. In this study, HO·concentration was assumed to remain constant in the procedure and pseudo-first-order model was established which involved the concentration of Fe2+, H2O2 and PG. The apparent rate constant kap and the intrinsic reaction rate constant of HO·with PG under optimal conditions were calcaulated, respectively.Then the adsorption capacities of MCC2004 and MCC2005 for PG wastewater were evaluated, respectively. The effect of different operational variables, such as initial PG concentration, temperarure, and activated carbon concentration were investigated, respectively. The adsorption data were processed to study the adsorption isotherms, kinetics, thermodynamics, and mechanism of PG onto the MCC2004 and MCC2005, respectively.We investigated the influence of activated carbon modified by HNO3, H2O2, NaOH, and NH3·H2O on the adsorption of PG onto MCC2004 and MCC2005, respectively. The physical characteristics of original and modified carbons were determined by nitrogen adsorption isotherms, respectively. The Boehm Method was applied in order to estimate the content of surface functional groups. The relationship among the properties of PG, structural characteristics of activated carbon, and adsorption capacity were analyzed for PG adsorption.At last, PG wastewater was treated by heterogeneous Fenton reaction using 5%Fe/C catalyst. The effect of different operational variables, such as the molar ratio of H2O2 to PG, the concentration of Fe/C catalyst, the dropping time of H2O2, and temperature were investigated, respectively.
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