新农药环境化学行为研究（V）─—三氟羧草醚（Acifluorfen）在土壤和水环境中的滞留、转化  

ENVIRONMENTAL BEHAVIOUR OF PESTICIDE(Ⅴ)PERSISTENCE AND TRANSFORMATION OF HERBICIDE ACIFLUORFEN IN SOIL-WATER ENVIRONMENT

作　　者：刘维屏[1] 方卓 

机构地区：[1]浙江大学化学系,浙江省工业环保设计所

出　　处：《环境科学学报》1995年第3期295-301,共7页Acta Scientiae Circumstantiae

基　　金：中国国家教委;浙江大学留学回国人员项目资助及意大利大学和研究部资助

摘　　要：从如下几方面研究了三氟羧草醚在土壤－水环境中的化学行为：一是土壤对该药的吸附，结果表明，吸附强度与土壤理化特性密切相关，Ｆｒｅｕｎｄｌｉｃｈ常数ｋ＿ｆ＝０．９４Ｗ＿（ＯＭ）＋０．６５Ｗ＿（ＣＬＡＹ）－９．５９ｐＨ（ｒ￣２＝０．９４）；二是吸附机理研究，发现三氟羧草醚能与碱金属以外的许多金属离子形成配合物，并证实了与Ｃｕ￣（２＋）形成的双核桥联配合物的可能性；三是实验指出它在水中避光有一定的稳定性，不易水解；四是它在＜３５０ｎｍ的光辐照下，易脱羧转化，速度较快，光解产物有较好的稳定性。HPLC,FTIR,X-ray power diffraction,ESR and ￣1H-NMR technique were used to in-vestigate the sorption on six soils,homoionic clays and humic acids and the photolysis of theherbicide sodium acifluorfen in aqueous solution. The sorption on soil depends on there phy-sical and chemical properties,For sorption activity,the humic acids were stronger thanclays,and soil pH was very important.The infrared and electron spin resonance spectra ofthe solution treated indicated coincident with spacings,which are the same for all the sam-ples. Its photolysis in aqueous solution afforded only product of photo-decarboxylation. Thereaction followed first order kinetics.

关 键 词：三氟羧草醚 土壤 吸附 农药 水环境 化学行为 

分 类 号：X131[环境科学与工程—环境科学]