水溶性有机物对草萘胺在土壤中吸附与迁移的影响

被引：19

作者：

马爱军 ^{[1
]}

周立祥 ^{[1
]}

何任红 ^{[2
]}

机构：

[1] 南京农业大学资源与环境科学学院

[2] 不详

来源：

环境科学 | 2006年 / 02期

关键词：

水溶性有机物; 草萘胺; 吸附; 迁移;

D O I：

10.13227/j.hjkx.2006.02.032

中图分类号：

X53 [土壤污染及其防治];

学科分类号：

082803 ; 120405 ;

摘要：

采用批次吸附试验和土柱淋洗试验,研究了绿肥和污泥中水溶性有机物(DOM)对除草剂草萘胺在黄棕壤和石灰性潮土上吸附和迁移影响.结果表明,供试DOM均能明显降低草萘胺在2种土壤上的吸附,促进草萘胺的迁移,在黄棕壤上效果更明显.在所研究的草萘胺和DOM浓度范围内,绿肥DOM(GM)都比污泥DOM(SS)作用显著.草萘胺的吸附等温线可用Freundlich方程定量描述.绿肥DOM和污泥DOM可分别使黄棕壤中草萘胺吸附量比对照处理(不加DOM)减少22.9%和11.3%,使迁移出土体的草萘胺总量提高了73.42%和26.87%,而使潮土中草萘胺的吸附量减少了9.5%和6.5%,迁移出土体的草萘胺总量增加了43.54%和28.29%.因此,农业土壤中溶解性有机物对农药环境行为有一定影响.

引用

页码：356 / 360

页数：5

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