作　　者： ; ; ; ; ;

机构地区： 华南师范大学化学与环境学院

出　　处： 《环境污染与防治》 2009年第2期14-18,22,共6页

摘　　要： 用浸渍法在活性炭(AC)上负载氧化铈(CeO2)制备催化剂CeO2/AC催化臭氧氧化去除邻苯二甲酸二甲酯(DMP),考察了臭氧投加量、DMP初始浓度和溶液初始pH的影响。结果表明,CeO2/AC催化臭氧氧化去除DMP的最佳臭氧投加量为50mg/h,DMP初始浓度和溶液初始pH对CeO2/AC催化臭氧氧化DMP过程都有一定的影响。在DMP初始质量浓度为30mg/L、溶液初始pH为5、臭氧投加量为50mg/h、反应60min时,CeO2/AC的加入(1.5g/L)有利于催化臭氧氧化DMP过程中总有机碳(TOC)的去除,TOC去除率由AC催化臭氧氧化的48%提高到68%,而单独臭氧氧化过程中的TOC去除率仅22%;且单独臭氧氧化与AC、CeO2/AC催化臭氧氧化DMP的矿化过程均符合二级反应动力学方程,CeO2/AC催化臭氧氧化DMP时TOC降解的二级反应动力学常数为0.0015L/(mg·min),分别是AC催化臭氧氧化的2.5倍和单独臭氧氧化的7.5倍。 Cerium-doped activated carbon catalyst （CeO2/AC） was prepared using dipping method to degrade dimethyl phthalate in water. The effects of ozone dosage, DMP initial concentration and pH on the catalytic ozone oxidation of DMP were investigated. The results showed that the optimal dosage of ozone was 50 mg/h under the test conditions. DMP initial concentration and pH had some effect on the catalytic ozone oxidation of DMP. Compared with the native activated carbon, CeO2/AC could notably enhance the catalytic ozone oxidation of DMP. The TOC removal rate using CeO2/AC catalyst at 60 min could reach 68%, compared with 48 % using AC catalyst and only 22 using ozone alone. The TOC degradation followed the second-order kinetics well. The rate constants of O3 alone, AC/O3 and CeO2/AC/O3 process were 0. 000 2, 0. 000 6 and 0. 001 5 L/（mg · min） respectively.

关 键 词： 氧化铈 活性炭 催化臭氧氧化 邻苯二甲酸二甲酯 总有机碳

领　　域： [环境科学与工程] [建筑科学]