Effects of humic substances on photodegradation of bensulfuron-methyl on dry soil surfaces

被引：41
|
作者：
Si, YB [1 ]
Zhou, J
Chen, HM
Zhou, DM
Yue, YD
机构：
[1] Anhui Agr Univ, Dept Plant Protect, Hefei 230036, Peoples R China
[2] Nanjing Agr Univ, Coll Resource & Environm Sci, Nanjing 210095, Peoples R China
[3] Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China
来源：
CHEMOSPHERE | 2004年 / 56卷 / 10期
关键词：
photoquenching effects; humic substances; degradation; bensulfuron-methyl; soil;
D O I：
10.1016/j.chemosphere.2004.04.059
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The photodegradation of the herbicide bensulfuron-methyl on dry soil surfaces in the presence and absence of humic substances was investigated under Xe lamp irradiation. A rapid rate of disappearance occurs in the humus-removed soil. The presence of humic acid (HA) and fulvic acid (FA) reduces degradation rates and has a quenching effect on the photodecomposition of bensulfuron-methyl. The quenching effect increases with increasing HA and FA concentration in soil. HA has a slightly greater ability to quenching the photolysis compared to FA. In addition, co-effects of HA and FA on quenching the photolysis are stronger than single effects of HA or FA. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：967 / 972
页数：6
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