Total mercury and methylmercury in soils collected from Guizhou Hg-mined areas

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State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China ^{[1
]}

不详 ^{[2
]}

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Huanjing Kexue | 2006年 / 3卷 / 550-555期

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摘要：

To investigate mercury pollution in soils from Hg-mined areas, total mercury (THg) and methylmercury (MeHg) were measured in soil samples collected from Hg-mined areas and control sites in Wanshan, Wuchuan and Lanmuchang Hg-mines in Guizhou, by using AAS and GC-CVAFS methods, respectively. Analytical data show that THg and MeHg concentrations range from 1.1 to 790 mg·kg-1 and 0.19 to 15 μg·kg-1 in Wanshan, from 0.33 to 317 mg·kg-1 and 0.41 to 20 μg·kg-1 in Wuchuan, and from 0.41 to 610 mg·kg-1 and 0.70 to 8.8 μg·kg-1 in Lanmuchang, respectively. However, THg and MeHg concentrations in soils from control sites are lower than those obtained from mining areas ranging from 0.14 to 1.2 mg · kg-1 and 0.09 to 0.23 μg·kg-1, respectively. THg concentrations in soils from control sites are comparable to or slightly higher than that in background soils worldwide which varied between 0.01 and 0.5 mg·kg-1. Results show that soils from paddy fields exhibit higher ability of methylation than that of vegetable and corn fields. Higher mercury pollution in soils from Wanshan Hg mines than those found in soils from Lanmuchang and Wuchuan Hg mines.

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