期刊
SOIL & SEDIMENT CONTAMINATION
卷 23, 期 1, 页码 49-62出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15320383.2013.772092
关键词
Adsorption; dissolved organic matter; mercury; soil; China
资金
- National Natural Science Foundation of China [40801088]
- Science and Technology Development Plan Project of Shandong Province [2012G0021706]
- Outstanding Young Scientists Grants of Shandong Province [2007BS08001]
- Key Project of Environmental Protection Science of Shandong Province [2011139]
The behavior and fate of mercury (Hg) in soil is mainly controlled by adsorption and desorption processes with various adsorbents, particularly dissolved organic matter (DOM). This study was conducted to assess the effect of DOM from wheat straw (DOMw) and swine manure (DOMs) on Hg (II) adsorption of black, red, and fluvo-aquic soils in China. Results showed that the Hg (II) adsorption isotherms fitted well with Langmuir and Freundlich equations. The maximum Hg (II) potential adsorption capacity by the three soils followed this trend: black soil > red soil > fluvo-aquic soil. The amount of Hg (II) adsorbed on the soils significantly decreased when DOMw and DOMs were added to the soil samples. Furthermore, the extent by which DOMw affected the Hg (II) adsorption of the three soils was higher than the effect of equivalent amounts of DOMs. Therefore, DOM is important to determine the fate of Hg (II) and control Hg (II) pollution in the environment.
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