乙酰甲胺磷残留光降解的动力学研究  

Study on Photodegradation Dynamics of Acephate Pesticide Residual

作　　者：姚杰[1] 刘铁兵[1] 岳永德[2] 李学德[2] 汤锋[2] 姚彦如[1] 程莹[1] 

机构地区：[1]安徽国家农业标准化与监测中心,安徽合肥230051 [2]安徽农业大学资源与环境学院安徽省农产品安全重点实验室,安徽合肥230036

出　　处：《安徽化工》2008年第3期43-45,共3页Anhui Chemical Industry

基　　金：安徽省科技厅项目(07020303057)

摘　　要：对水中的乙酰甲胺磷残留在不同光强和pH条件下的降解及动力学情况进行了研究。结果表明,乙酰甲胺磷在水中的降解与光强和水的pH关系密切,太阳光条件下比水中的降解明显加快;碱性水中乙酰甲胺磷降解较快,酸性水中降解相对较慢;室温下,在pH为4.0、7.0、9.0水中乙酰甲胺磷避光条件下降解速率常数分别为5.4×10-3、2.24×10-2、6.49×10-2d-1,半衰期分别为128.36d、30.94d、10.68d;太阳光下在pH为4.0、7.0、9.0水中降解速率常数分别为3.92×10-2、4.09×10-2、6.14×10-2h-1,半衰期分别为17.68h、16.95h、11.29h。This paper is an attempt to study degradation of acephate at different light intensity and various pH solution. The results indicated that acephate was stable in acidic water,while the degradation rate accelerated with the rising pH. At the room temperature, under dark conditions the degradation rate constants K of acephate in pH=4.0, pH=7.0, pH=9.0 waters were 5.4×10^-3,2.24×10^-2,6.49×10^-2d^-1 and the corresponding half life were 128.36d,30.94d,10.68d. Under the sun＇s rays the degradation rate constants K of acephate in pH=4.0, pH=7.0, pH=9.0 waters were 3.92×10^-2,4.09×10^-2, 6.14×10^-2h^-1 and the corresponding half life were 17.68h, 16.95h, 11.29h .

关 键 词：乙酰甲胺磷残留 降解 太阳光 

分 类 号：TQ453.22[化学工程—农药化工] O313[理学—一般力学与力学基础]