水体系中Fe(Ⅱ)/S2O8^2--S2O3^2-降解敌草隆的研究  

Studies on Fe(Ⅱ)/S_2O_8^(2-)-S_2O_3^(2-) degrading diuron in aqueous system

作　　者：张金凤[1] 杨曦[1] 郑伟[1] 陈蕾[1] 

机构地区：[1]南京大学环境学院,污染控制与资源化研究国家重点实验室,江苏南京210093

出　　处：《中国环境科学》2008年第7期620-623,共4页China Environmental Science

基　　金：国家自然科学基金资助项目(50578074,20207004)

摘　　要：在初始pH值为7.0的水体系中,通过正交实验确定了Fe(Ⅱ)/S2O82-S2O32-降解敌草隆的最佳操作条件:Na2S2O8浓度2.0mmol/L,Fe(Ⅱ)浓度1.0mmol/L,Na2S2O3浓度0.5mmol/L,反应时间120min.在此条件下0.1mmol/L敌草隆降解率达到91.3%.利用乙醇和叔丁醇作为分子探针。In the aqueous system of initial pH value of 7.0 through orthogonal test and individual factor test,the optimal operation condition of Fe（Ⅱ）/S2O8^2--S2O3^2-degrading diuron was determined to be Na2S2O8 concentration 2.0mmol/L,Fe（Ⅱ） concentration 1.0mmol/L,Na2S2O3 concentration 0.5mmol/L under the condition of reaction time 120min,0.1mmol/L diuron degradation rate reached 91.3%. The sulfate free racial and hydroxyl free radical produced in system were determined by molecular probes（ethanol and tert-butanol） methods,and the reaction mechanism of Fe（Ⅱ）/S2O8^2--S2O3^2-system produced sulfate free radical was discussed.

关 键 词：敌草隆 过硫酸钠 硫代硫酸钠 Fe(Ⅱ) 硫酸根自由基 

分 类 号：X52[环境科学与工程—环境工程]