EDTA改性电-Fenton反应降解DMP  

STUDY ON DEGRADATION OF DMP BY ELECTRO-FENTON MODIFIED WITH EDTA

作　　者：田法[1] 彭绍琴[1] 

机构地区：[1]南昌大学化学系,江西南昌330031

出　　处：《水处理技术》2008年第9期71-74,共4页Technology of Water Treatment

基　　金：江西省自然科学基金资助项目(2007GZH1754);江西省教育厅基金资助项目(赣教技字[2007]54号)

摘　　要：采用EDTA络合Fe2+的方法改性电-Fenton反应体系降解水中DMP(邻苯二甲酸二甲酯)。考察了pH值、Fe2+/EDTA初始浓度、Fe2+与EDTA的物质的量比、不同络合剂体系对DMP降解的影响。结果表明,EDTA络合Fe2+方法改性的电-Fenton反应体系可在中、碱性条件下降解DMP;在pH=7,恒电流6 mA,电解质Na2SO4浓度0.1mol·L-1,曝气速率300 mL·min-1的条件下,处理20 mg·L-1DMP溶液,Fe2+/EDTA的最佳初始浓度为0.5 mmol·L-1,反应3 h,DMP去除率达98%以上。不同的Fe2+与EDTA的物质的量比对DMP的降解效果有不同程度的影响。The DMP wastewater was treated by electro-Fenton modified with EDTA chelating Fe^2＋. Effect of pH, Fe^2＋/EDTA initial concentration, molar ratio of Fe^2＋ to EDTA and system adding various chelating agent on the removal efficiency was investigated. The results showed that the electro-Fenton system modified with EDTA chelating Fe^2＋ can degrade DMP under neutral or basic conditions. Under the following conditions, pH=7, 6 mA invariable current, 0.1 mmol·L^-1 electrolyte Na2SO4, rate of O2 current at 300 mL· min^-1, the Fe^2＋/EDTA optimum initial concentration is 0.5 mmol·L^-1 when treating DMP with an initial concentration of 20 mg·L^-1, the removal efficiency of DMP is up to 98% after reacting for 3 h. Different molar ratio of Fe^2＋ to EDTA has different extent of effect on the removal efficiency of DMP.

关 键 词：电-FENTON H2O2 Fe^2+/EDTA DMP 

分 类 号：TQ031.7[化学工程]