氯虫苯甲酰胺在水溶液中光解的影响因素研究  

Photodegradation of Chlorantraniliprole in Aqueous Solution

作　　者：吴群[1] 施艳红[1] 操海群[2] 李学德[1] 花日茂[1] 汤锋 岳永德 

机构地区：[1]安徽农业大学资源与环境学院,安徽省农产品安全重点实验室,合肥230036 [2]安徽农业大学植物保护学院,安徽省农产品安全重点实验室,合肥230036 [3]国际竹藤中心,北京100080

出　　处：《农业环境科学学报》2014年第11期2242-2246,共5页Journal of Agro-Environment Science

基　　金：国家自然科学基金(20807001);安徽省优秀青年科技基金资助项目(10040606Y01)

摘　　要：以紫外灯为光源,研究了氯虫苯甲酰胺在水溶液中的光化学降解。结果表明,氯虫苯甲酰胺的光解符合一级动力学方程。在试验设定的浓度范围内,氯虫苯甲酰胺的光解速率与其初始浓度呈负相关;碱性缓冲溶液中氯虫苯甲酰胺的光解速率最慢,而在酸性和中性缓冲溶液中的光解速率相对较快;在不同水质中氯虫苯甲酰胺的光解速率从大到小的顺序为超纯水〉自来水〉塘水〉湖水〉河水;H2O2对氯虫苯甲酰胺表现出显著的光敏化降解作用,使其光解速率常数提高了3.11～1.08倍,而当H2O2浓度添加至一定量后,其光敏作用减弱。研究结果将为阐明氯虫苯甲酰胺在水体中的环境行为及其环境安全性评价提供科学依据。Photodegradation is an important pathway of degradation of chemicals in water environment. This study investigated the photo- chemical degradation of chlor＇antraniliprole in aqueous solution under irradiation of UV lamp. The photolysis of chlorantraniliprole could be characterized by first-order kinetic equation, and was negatively correlated with its initial concentrations. Its photolysis was slower in alka- line than in neutral and acidic solutions. The degradation rate of chlorantraniliprole in different types of water was in sequence of ultra-pure water〉tap water〉pond water〉lake water〉river water. Hydrogen peroxide（H2O2） showed significant stimulgting effect on chlorantraniliprole photolysis, enhancing photolysis rates by 3.11～1.08 times, but such stimulating effect decreased with increasing H2O2 to a certain concentra- tion. These results would advance our understanding of environmental fates and safety assessment of chlorantraniliprole in water environ- ment.

关 键 词：氯虫苯甲酰胺 光化学降解 水溶液 半衰期 

分 类 号：X592[环境科学与工程—环境工程]