4种农药在稻田水中的残留降解  

Residue Degradation of Four Kinds of Pesticide in Rice Field Water

作　　者：张晓红[1] 陈佳瀛[1] 张大弟[1] 

机构地区：[1]上海交通大学农学院,上海201101

出　　处：《上海环境科学》2000年第8期402-404,共3页Shanghai Environmental Sciences

摘　　要：对乐果、杀虫草、丁草胶和氰戊菊酯4种农药,在稻田水中的残留降解情况,进行了试验及比较。结果表明,4种农药在稻田水中的残留降解符合crCO。‘’或 C=A e-“’+B e”的数学式;据此可计算其平均降解半衰期(to。)分别为:1.86、1.35、088和 038d。其中了草胺和氰戊菊酯的降解前快后慢;氰戊菊酯的降解快于乐果,土壤吸附氰戊菊酯是其降解快的重要原因。脂溶性农药对水环境的污染要轻于水溶性农药。Residue degradation of dimethorate, molosultap, butachlor and fenvalerate in rice field water have been studied and compared. The result showed that residue degradation of four kinds of pesticide in rice field water coincided with C=C0.e-kt mathematical model, their average half-life (t0.5)of residue degradation in rice field water were 1.86, 1.35, 0.88 and 0.38 days respectively, residue degradation of butachlor and fenvalerate was fast in early stage and slow in late stage; degradation of fenvalerate was faster than of dimethoate, soil absorbing fenvalerate from water was an important reason of its fast degradation. Based on the test result, considering that water environmental pollution by lipo soluble pesticides was lighter than water-soluble pesticides.

关 键 词：农药污染 稻田水 残留降解 水体污染 

分 类 号：X592.02[环境科学与工程—环境工程] X132