土壤中3,4-二氯苯胺降解动力学及其生态毒性  

Degradation Kinetics and Ecotoxicity of 3,4-Dichloroaniline in Soils

作　　者：蒋新[1] 周建民[1] P.Müller 

机构地区：[1]中国科学院南京土壤研究所,南京210008 [2]德国萨尔大学环境科学研究中心

出　　处：《环境科学》2000年第5期94-96,共3页Environmental Science

基　　金：国家重点基础发展规划项目! ( G1 9990 1 1 80 1 - 3);中国科学院知识创新项目

摘　　要：敌草隆 ( diuron)是一种广泛被应用的取代脲类除草剂 ,其主要降解产物为 3,4-二氯苯胺 [1 ] .研究 3,4-二氯苯胺在不同土壤中的降解动力学规律 ,并用土壤环境指示动物弹尾目 ( Collembola)跳虫 ( Folsomia candida)跟踪指示该化合物在进一步降解过程中的毒性 .结果表明 :3,4-二氯苯胺在土壤中的降解行为可用一级反应动力学方程来较好地描述 ,其生态毒性明显高于母体化合物敌草隆 ,该化合物在粘土中的残留量低于砂土 ,但毒性却明显大于砂土 ,指出应注重同步研究农药降解产物的环境化学及生态毒性行为 .Diuron is a widely used herbicide of the substitued urea,main metabolite of which is 3,4 dichloroaniline.The degradation kinetics and toxicity of 3,4 dichloroaniline and its further metabolite to environmental biological indicator( Folsomia candida) in different soils were studied in this paper.The experiment results showed that the degradation behavior of 3,4 dichloroaniline in soils could be described by first order kinetics very well.It is obvious that the toxicity of 3,4 dichloroaniline in soils is higher than mother compound(diuron)and doesn't depends only on the content of 3,4 dichloroaniline in soils.The toxicity is related also to physical chemical properties of the test soils.3,4 dichloroaniline in clay soil is more toxic to test organism( F.candida) than in sand soil.

关 键 词：二氯苯胺 降解动力学 生态毒性 土壤污染 农药 

分 类 号：X592.05[环境科学与工程—环境工程] X530.5