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Water, Air, and Soil Pollution

, Volume 95, Issue 1–4, pp 35–43 | Cite as

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

  • D. Y. Wang
  • C. L. Qing
  • T. Y. Guo
  • Y. J. Guo
Article

Abstract

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−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 μg 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.

Key words

humic acid mercury transport transformation soil-plant system 

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Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • D. Y. Wang
    • 1
  • C. L. Qing
    • 1
  • T. Y. Guo
    • 1
  • Y. J. Guo
    • 1
  1. 1.College of Resources and EnvironmentSouthwest Agricultural UniversityChongqingChina

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