3种化学物质对新农药硫肟醚光解的影响  

Effect of Several Chemical Substances on Photodegradation of Novel Insecticide HNPC-A9908 in Aqueous Solution

作　　者：欧晓明[1,2] 王晓光 柳爱平 黄明智 雷满香[1] 任竞[1] 

机构地区：[1]湖南化工研究院农药剂型及应用系统研究所 [2]国家农药创制工程技术研究中心,长沙410007 [3]国家农药创制工程技术研究中心

出　　处：《农药》2007年第1期43-45,共3页Agrochemicals

基　　金：国家十五科技攻关重点项目(2001BA308A02-10;2004BA308A21-4)

摘　　要：硫肟醚[O-(3-苯氧苄基)-2-甲硫基-1-(4-氯苯基)丙基酮肟醚]是我国研制成功的具有自主知识产权的一种新型杀虫剂。在室内紫外光(λ=254nm)照射下研究了3种化学物质对硫肟醚在水溶液中的光解。试验结果表明,当邻硝基氯苯、对硝基苯酚和茚三酮等有机化合物分别与硫肟醚以1∶1(体积比)的比例混合后,硫肟醚的光解速率发生了不同程度的改变,其中邻硝基氯苯和对硝基苯酚使硫肟醚的光解速率减慢,光解半衰期从22.30min分别延长到27.75min和29.45min,表现出光猝灭降解效应。而茚三酮却提高了硫肟醚的光解速率,使光解半衰期从22.30min缩短到14.38min,表现为光敏化降解效应。Effect of several chemical substances on photodegradation of novel insecticide HNPC-A9908[O-（3- phenoxybenzyl）-2-methylthio-1-（4-chlorophenyl）propyl ketone oxime] in soils was studied under the irradiation of ultraviolet light （λ=254 nm） in the laboratory. Experimental results showed that photodegradation rate of HNPC- A9908 varied when the insecticide HNPC-A9908 was combined with the three kinds of chemical substances such as m-nitrobenzenel chloride, p-nitrophenol and ninhydrin at 1：1 ratio（by vol）, respectively. The organic chemical mnitrobenzenel chloride and p-nitrophenol made photodegradation half-life of HNPC-A9908 extend from 22.3 to 27.75 min and 29.45 rain, respectively, showing a photoextinction effect, and ninhydrin exhibited a photosensitization effect that changed from the half-life of 22.3 min into 14.38 min.

关 键 词：硫肟醚 光解动力学 光猝灭效应 光敏化效应 

分 类 号：X592[环境科学与工程—环境工程]