Mercury isotope variations in surface soils in different contaminated areas in Guizhou Province,China  

作　　者：FENG XinBin YIN RunSheng YU Ben DU BuYun 

机构地区：[1]State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences [2]State Key Laboratory of Ore Deposit Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences [3]Graduate University of the Chinese Academy of Sciences

出　　处：《Chinese Science Bulletin》2013年第2期249-255,共7页

基　　金：supported by the National Natural Science Foundation of China (40825011)

摘　　要：Guizhou Province is known as a heavily Hg-polluted area in China due to its special geochemical background and complicated Hg emission sources.In this study,we investigated the Hg isotope compositions of surface soil samples in the Hg mining area,zinc smelting area,coal combustion area,which are known to be the typical pollution regions of Hg in this province.We also compared the Hg isotopic fingerprints of primary Hg sources,such as hydrothermal Hg-bearing ores,coals and atmospheric Hg samples.According to our study,Hg stored in surface soils in different pollution regions in Guizhou Province displays a wide range of both mass dependent fractionation(MDF,δ202Hg) and mass independent fractionation(MIF,△199Hg).δ 202 Hg varies by 2.0‰ and △199Hg varies by 0.25‰ in the investigated surface soils.This study demonstrated that using a "MDF-MIF" two dimensional Hg isotope system could be particularly useful in discriminating Hg sources in soils.Guizhou Province is known as a heavily Hg-polluted area in China due to its special geochemical background and complicated Hg emission sources. In this study, we investigated the Hg isotope compositions of surface soil samples in the Hg mining area, zinc smelting area, coal combustion area, which are known to be the typical pollution regions of Hg in this province. We also compared the Hg isotopic fingerprints of primary Hg sources, such as hydrothermal Hg-bearing ores, coals and atmospheric Hg samples. According to our study, Hg stored in surface soils in different pollution regions in Guizhou Province displays a wide range of both mass dependent fractionation （MDF, δ^202Hg） and mass independent fractionation （MIF, △199Hg）. δ202Hg varies by 2.0‰ and △199Hg varies by 0.25‰ in the investigated surface soils, This study demonstrated that using a ＂MDF-MIF＂ two dimensional Hg isotope system could be particularly useful in discriminating Hg sources in soils.

关 键 词：汞同位素 表层土壤 污染地区 贵州省 中国 地球化学背景 土壤样品 同位素组成 

分 类 号：X833[环境科学与工程—环境工程]