高效氯氰菊酯在土壤中的降解动态  

The degradation trends of high effect cypermethrin in soils.

作　　者：何华[1,2] 徐存华[3] 孙成[1] 王晓蓉[1] 单正军[1] 

机构地区：[1]南京大学污染控制与资源化研究国家重点实验室 [2]中国药科大学分析化学教研室,江苏南京210009 [3]中国药科大学分析化学教研室

出　　处：《中国环境科学》2003年第5期490-492,共3页China Environmental Science

基　　金：国家自然科学基金资助项目(29877010)

摘　　要：在实验室条件下研究了高效氯氰菊酯两个异构体在3种土壤中的降解动态,随着时间的延长,氯氰菊酯在土壤中的含量逐渐减少.在未考虑土壤中微生物的作用时,3种农药在土壤中的稳定性与土壤中的有机质含量及pH值存在一定的相关性;高效氯氰菊酯在有机质含量高、pH值高的土壤中降解较快;在土壤中的降解以微生物降解为主,化学降解为辅.高效氯氰菊酯顺式体、反式体在黑土中的降解半衰期分别为7.95,5.35d;在河南二合土中的降解半衰期分别为13.2,6.87d;在江西红壤中的降解半衰期分别为30.3,15.9d,3种土壤微生物均选择性降解高效氯氰菊酯反式体,并且在酸性土壤中表现得更为稳定.Under laboratory conditions, the degradation trends of two high effect cypermethrin isomers in soils were studied. Their contents in soils were diminished gradually with the time. Without thinking the action of microbe in soils, the stability of 3 kinds of pesticide had definite relation with the contents of organic matter and pH value in soils. The half-life values of alpha-cypermethrin and theta-cypermethrin in black soil were 7.95d and 5.35d; in Henan fluvo-aquic soil were 13.2d and 6.87d; and in Jiangxi red soil were 30.3d, 15.9d respectively. The microorganisms in 3 kinds of soils preferentially degraded the theta-cypermethrin and were more stable in the acid soil.

关 键 词：高效氯氰菊酯 立体异构体 土壤 降解 固相萃取-HPLC 

分 类 号：X131.3[环境科学与工程—环境科学]