γ-辐照对水中敌草隆的降解研究  

DEGRADATION OF DIURON IN WATER BY γ-IRRADIATION

作　　者：张继彪[1] 郑正[1] 徐悦[1] 王联红[1] 赵永富[1,2] 赵坦[1] 钟云[1] 

机构地区：[1]污染控制与资源化研究国家重点实验室,南京大学环境学院,南京210093 [2]江苏省农业科学院原子能研究所

出　　处：《环境化学》2007年第6期745-748,共4页Environmental Chemistry

基　　金：国家自然科学基金项目(No.10475040)

摘　　要：以敌草隆作为研究对象,探讨了γ-辐照对敌草隆的降解效果,以及NO3-,NO2-,H2O2和CO32-对降解效果的影响,在初始浓度为18.5mg·l-1时,1.0kGy的辐照剂量即可达到完全去除;随着辐照剂量的增加,敌草隆水溶液在200nm—400nm处的吸光度均逐渐减小,敌草隆的浓度也逐渐减小.NO3-,NO2-,H2O2和CO32-的加入均抑制了敌草隆的降解.辐照降解敌草隆的过程主要是由.OH自由基引起的,并且可以用一级动力学来描述.The kinetics and mechanism of Diuron that γ-irradiation was efficient in degradati degradation by γ-irradiation were investigated. The results showed on of Diuron. At the initial concentration of 18.5mg·l^-1, all Diuron was removed when 1.0kGy was selected as the radiation dose. Diuron concentration and the UV absorbances at 200-400nm decreased with the increase of radiation dose. NO3^-, NO2^-, H2O2and CO3^2- inhibited the degradation process. The process was mainly caused by the reaction of Diuron with ·OH and the reaction could be depicted by first order reaction kinetics.

关 键 词：Γ-辐照 敌草隆 降解 

分 类 号：X132[环境科学与工程—环境科学]