摘要
In this study, photo-Fenton oxidation was applied to degradation of sulfamonomethoxine sodium (SMMS) in aqueous solution. The operation parameters of pH, temperature, and concentrations of H2O2, Fe2+ and SMMS were investigated. The optimum conditions for the photo-Fenton process were determined as follows: [SMMS]=4.53 mg/L, pH 4.0, [H2O2]=0.49 mmol/L, [Fe2+]= 19.51 μmol/L and T=25°C. Under these conditions 98.5% of the SMMS degraded. The kinetics were also studied, and degradation of SMMS by the photo-Fenton process could be described by first-order kinetics. The apparent activation energy was calculated as 23.95 kJ/mol. Mineralization of the process was investigated by measuring the chemical oxygen demand (COD), and the COD decreased by 99% after 120 min. This process could be used as a pretreatment method for wastewater containing sulfamonomethoxine sodium.
In this study, photo-Fenton oxidation was applied to degradation of sulfamonomethoxine sodium （SMMS） in aqueous solution. The operation parameters of pH, temperature, and concentrations of H2O2, Fe^2＋ and SMMS were investigated. The optimum con ditions for the photo-Fenton process were determined as follows： [SMMS]=4.53 mg/L, pH 4.0, [H2O2]=0.49 mmol/L, [Fe^2＋]= 19.51μmol/L and T=25℃. Under these conditions 98.5% of the SMMS degraded. The kinetics were also studied, and degradation of SMMS by the photo-Fenton process could be described by first-order kinetics. The apparent activation energy was calcu- lated as 23.95 kJ/mol. Mineralization of the process was investigated by measuring the chemical oxygen demand （COD）, and the COD decreased by 99% after 120 min. This process could be used as a pretreatment method for wastewater containing sulfa- monomethoxine sodium.
基金
supported by the Key Scientific and Technological Program of Henan Province (0522030700, 102102310303 and 0611020900)
