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《Acta Scientiae Circumstantiae》 2003-01
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The transport and degradation of pesticide on irradiated soil layers

SI Youbin+1, YUE Yongde+1, Zhou Dongmei+2, CHEN Huaiman+2 (1.College of Environmental Science & Technology, Anhui Agriculture University, Hefei 230036; 2. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008)  
On irradiated soil layers, the observed overall pesticide degradation rate is not only determined by photodegradation itself but is also a function of the layer thickness and in many cases of transport processes. In this article we describe a theoretical framework understand combined effects of these different processes, and we present an experimental setup that allows a separate quantification of actual photodegradation and diffusive transport processes. For the compound bensulfuron methyl we performed experiments on soil layers of variable thickness and evaluated the results using a mathematical model. Thus, we were able to determine the actual photodegradation rate constants that are independed of transport kinetics.
【Fund】: 国家自然科学基金 (2 98770 0 1);; 中国科学院红壤生态开放实验站基金;; 安徽省高等学校青年教师科研资助计划资助项目
【CateGory Index】: X592
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