Effects of humic acid on transport and transformation of mercury in soil-plant systems

被引：52
|
作者：
Wang, DY
Qing, CL
Guo, TY
Guo, YJ
机构：
[1] Southwest Agricultural University,College of Resources and Environment
来源：
WATER AIR AND SOIL POLLUTION | 1997年 / 95卷 / 1-4期
关键词：
humic acid; mercury; transport; transformation; soil-plant system;
D O I：
10.1023/A:1026468724284
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The influence of humic acid (HA) on the transport and transformation of mercury (Hg) in soil was studied. No available Hg could be detected (<2.5 mu g kg(-1)) in alluvial soil when the content of HA-carbon (HA-C) was higher than 0.2 g kg(-1) although a large amount of Hg (8 mu g kg(-1)) was applied to the soil. The available Hg decreased with the increase of HA in purple soil (r=0.735). There are significant correlations between HA concentration and organic Hg in the tested soils (r=0.974 for the purple soil and r=0.979 for the alluvial soil). The increase of HA results in decrease of Hg absorbed by plant from the soil. A loss of Hg from soil caused by microbes was observed.
引用
收藏
页码：35 / 43
页数：9
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