研究论文
毕刚,田世忠,冯子刚,程介克.拟除虫菊酯与有机磷农药混合溶液的光敏降解[J].环境科学学报,1996,16(3):317-324
拟除虫菊酯与有机磷农药混合溶液的光敏降解
- PHOTOLYSIS OF PYRETHROIDS BLENDED WITH ORGANIC PHOSPHORUS PESTICIDES
- 基金项目：
- 作者
- 单位
- 毕刚
- 武汉大学环境科学系,430072
- 田世忠
- 武汉大学环境科学系,430072
- 冯子刚
- 武汉大学环境科学系,430072
- 程介克
- 武汉大学环境科学系,430072
- 摘要：研究了胺菊酯、甲醚菊酯、丙烯菊酯和氯菊酯以及甲基1650、毒死蜱、乐果在高压汞灯照射下的光解速率及其混合物在光解过程中的相互影响,结果表明光解速率顺序与农药的种类有关；两种不同类型杀虫剂共存时将改变彼此的光解速率,发生光敏作用,有机磷农药对拟除虫菊酯光敏作用的顺序是甲基1605>毒死蜱>乐果；有机磷农药的摩尔吸光系数与光解速率及敏化作用能力存在一定的相关性。光解产物的检测表明有机磷农药主要通过3O2机理来敏化拟除虫菊酯光解的。
- Abstract：The photolysis rates of tetramethrin, methothrin, allethrin, permethrin, parathionmethyl, chlorpyrifos and dimethoate in irradiation of high-pressure mercury lamp and the effect on each other were determined- The results showed that the sequence of their photolysis rates is relative to the structure. The blending of two kinds of pesticides will change the photolysis rates of each other. The sequence of photosensitization of organic phosphorus pesticides to pyrethroid is parathion-methyl>chlorpyrifos>demethoate. Relationship exist between ελ of organic phosphorus pesticide and their photolysis rates and photosensitization. Photolysis products are detected by GC-MS and the mechanism of photosensitization is discussed.
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