EFFECTS OF HUMIC ACID ON TRANSPORT AND TRANSFORMATION OF MERCURY IN SOIL-PLANT SYSTEMS

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 μg kg^sup -1^) in alluvial soil when the content of HA-carbon (HA-C) was higher than 0.2 g kg^sup -1^ although a large amount of Hg (8 μg kg^sup -1^) w...

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Published inWater, air, and soil pollution Vol. 95; no. 1-4; p. 35
Main Authors Wang, D Y, Qing, C L, Guo, T Y, Guo, Y J
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Nature B.V 01.04.1997
Subjects
Acidic soils
Alluvial soils
Environmental monitoring
Humic acids
Mercury
Organic soils
Soil testing
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Summary: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 μg kg^sup -1^) in alluvial soil when the content of HA-carbon (HA-C) was higher than 0.2 g kg^sup -1^ although a large amount of Hg (8 μg kg^sup -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.[PUBLICATION ABSTRACT]
ISSN:0049-6979
1573-2932
DOI:10.1023/A:1026468724284