Author(s): Li Zhangliang, Huang Jianhui, Xiao Shangzhong, Guo Hailing, Key Laboratory of Ecological Environment and Information Atlas, Fujian Provincial University, College of Environmental and Biological Engineering, Putian University
Pages: 827-833
Year: 2014 Issue:  3
Journal: Chinese Journal of Environmental Engineering
Keyword:  Fe /activated carbon catalyst; catalytic oxidation; dimethyl phthalate; degradation;
Abstract: Fe3+ immobilized activated carbon catalyst was prepared and its catalytic degradation behaviors to dimethyl phthalate( DMP) were investigated. By orthogonal and single factor experiments,the effects of catalyst dosage,H2O2 dosage,pH value and reaction temperature on the degradation rate of DMP were discussed. At the same time,the mineralization rate of DMP was analyzed. The experimental results showed that the catalyst had high catalytic activity. The influence of these factors followed the order of reaction temperature > catalyst dosage > H2O2 dosage > pH value. Under the optimal conditions with reaction temperature of 80℃,catalyst dosage of 4 g/L,H2O2dosage of 20 mL/L,pH value of 3,the highest degradation rate of DMP could reach up to 97. 73% after 120 min when the DMP initial concentration was 10 mg/L. Under the optimized experimental conditions,the mineralization rate of DMP was 62. 73% within 150 min. The catalytic activity after 5 times of reuse was still good with more than 77% on the degradation rate of DMP. The Fe3+ concentration change remained 1. 07 mg/L approximately during the reaction process and the catalytic degradation of DMP was ascribed to the heterogeneous and homogeneous catalytic oxidation reaction jointly on the catalytic degradation of DMP.