| 高效氯氰菊酯在土壤中的降解动态 |
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| 引用本文： | 何华,徐存华,孙成,王晓蓉,单正军.高效氯氰菊酯在土壤中的降解动态[J].中国环境科学,2003,23(5):0-0. |
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| 作者姓名： | 何华 徐存华 孙成 王晓蓉 单正军 |
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| 作者单位： | 1.南京大学污染控制与资源化研究国家重点实验室 江苏南京210093;2.中国药科大学分析化学教研室 江苏南京210009 |
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| 基金项目： | 国家自然科学基金资助项目(29877010) |
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| 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.
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| 关 键 词： | 高效氯氰菊酯 立体异构体 土壤 降解 固相萃取-HPLC |
| 文章编号： | 1000-6923(2003)05-0490-03 |
| 收稿时间： | 1900-01-01; |
| 修稿时间： | 2002年12月2日 |
The degradation trends of high effect cypermethrin in soils |
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| HE Hua,XU Cun-hua,SUN Cheng,WANG Xiao-rong,SHAN Zheng-jun.The degradation trends of high effect cypermethrin in soils[J].China Environmental Science,2003,23(5):0-0. |
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| Authors: | HE Hua XU Cun-hua SUN Cheng WANG Xiao-rong SHAN Zheng-jun |
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| Institution: | HE Hua1,2,XU Cun-hua2,SUN Cheng1,WANG Xiao-rong1,SHAN Zheng-jun1 |
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| Abstract: | 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. |
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| Keywords: | high effect cypermethrin stereo isomer soil degradation SPE-HPLC |
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