用光助Fenton体系降解邻苯二甲酸二甲酯  

Photodegradation of Dimethyl Phthalate by UV-Fenton System

作　　者：景伟文[1] 包晓玮[1] 陈燕勤[1] 杨再磊[1] 刘洋[1] 

机构地区：[1]新疆农业大学化学工程学院,乌鲁木齐830052

出　　处：《吉林大学学报（理学版）》2011年第2期358-362,共5页Journal of Jilin University:Science Edition

基　　金：新疆维吾尔自治区高校科研计划项目青年教师科研启动基金(批准号:XJEDU2009S40);新疆农业大学校内前期资助项目(批准号:200712)

摘　　要：利用几种不同的氧化体系对水溶液中的邻苯二甲酸二甲酯(DMP)进行光化学降解.结果表明:降解效率依次为:UV/Fenton>UV/H2O2>无光Fenton>UV/Fe2+>UV>H2O2;紫外光与Fenton体系之间存在协同效应;UV/Fenton体系是高效的降解体系;pH值、H2O2浓度、Fe2+浓度是光化学降解的重要影响因素,各因素的重要性顺序为:pH值>H2O2浓度>Fe2+浓度;正交实验确定适宜的降解条件为:初始pH=3～4,Fe2+浓度为3.6×10-4～7.2×10-4 mol/L,H2O2浓度为1.9×10-2 mol/L.The photochemical degradation of dimethyl phthalate（DMP） in aqueous solution was investigated via a comparative assessment in various advanced oxidation systems（UV,H2O2,UV/H2O2,UV/Fe2＋,Fenton and UV/Fenton）.The degradation trends followed the following order： UV/FentonUV/H2O2dark/FentonUV/Fe2＋UVH2O2.It could be inferred from the studies that UV radiation enhanced the removal rate of DMP in the Fenton process and UV/Fenton was the most effective for the decomposition of DMP.According to the experimental result,the concentrations of Fe2＋ and H2O2 and pH value were the three main factors that could greatly influence the degradation rate of DMP,and the effect of the factors followed the order： pH valueH2O2 concentrationFe2＋ concentration.The optimum conditions were obtained by orthogonal experiment at initial pH=3—4 for the UV-Fenton system,with original Fe2＋ and H2O2 concentrations of 3.6×10-4—7.2×10-4 mol/L and 1.9×10-2 mol/L,respectively.

关 键 词：UV-Fenton法 邻苯二甲酸二甲酯 光降解 

分 类 号：X132[环境科学与工程—环境科学]