农药在光照土壤层的迁移和降解

被引:11
作者
司友斌
岳永德
周东美
陈怀满
机构
[1] 安徽农业大学环境科技学院
[2] 中国科学院南京土壤研究所
[3] 中国科学院南京土壤研究所 合肥
[4] 合肥
[5] 南京
关键词
农药; 光解; 扩散; 土壤厚度;
D O I
10.13671/j.hjkxxb.2003.01.023
中图分类号
X592 [农用化学物质、有毒化学物质污染及其防治];
学科分类号
082803 ;
摘要
光照条件下 ,农药在土壤层中的降解速率不仅决定于光解本身 ,而且还是土层厚度、迁移过程的函数 .为此 ,描述了理解这些不同过程复合效果的理论框架 ,提出了允许实际光解过程和扩散过程分离定量的实验方案 ,同时进行了除草剂苄嘧磺隆在不同厚度土壤中的光解实验 ,并用数学模型评价了实验结果 .实验中确定了苄嘧磺隆在土壤中的实际光解速率常数 ,这个常数是不依赖于迁移动力学的 .
引用
收藏
页码:119 / 123
页数:5
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