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杨 净,王 宁,蔡青香. 夹皮沟金矿区土壤汞的赋存形态及污染特征[J]. 生态毒理学报, 2014, 9(5): 924-932
夹皮沟金矿区土壤汞的赋存形态及污染特征
Chemical Speciation and Pollution Characteristics of Hg in Soils from Jiapigou Gold Mining Area
投稿时间:2014-05-12  修订日期:2014-07-22
DOI:10.7524/AJE.1673-5897.20140512001
中文关键词:  金矿区  土壤    赋存形态  改进的BCR法
英文关键词:gold mining area  soil  Hg  chemical speciation  modified BCR
基金项目:国家自然科学基金项目(40673059)
作者单位
杨 净 东北师范大学环境学院 长春130117 
王 宁 东北师范大学环境学院 长春130117 
蔡青香 长春外国语学校 长春130012 
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中文摘要:
      使用改进的BCR连续提取法和电感耦合等离子质谱(ICP-MS),测定夹皮沟金矿区土壤样品中汞元素的赋存形态及含量。结果表明,三个深度的土壤汞元素形态分布趋势相似,均以残渣态为主,其次为可氧化态和可还原态,酸溶/可交换态和水溶态所占比例较少,各形态汞的分配系数依次为:残渣态(48.28%)>可氧化态(25.68%)>可还原态(13.35%)>酸溶/可交换态(8.38%)>水溶态(4.33%)。垂直方向上,20~40 cm的中层土壤中的汞含量略高于0~20 cm的表层土壤,40~60 cm的下层土壤则含量最低。不同深度土壤中的有效态汞与总汞的含量具有较高的相关性,但三层土壤不具有相同的相关趋势。
        
AuthorAffiliation
Yang JingSchool of Environment, Northeast Normal University, Changchun 130117, China
Wang NingSchool of Environment, Northeast Normal University, Changchun 130117, China
Cai QingxiangChangchun foreign language school, Changchun 130012, China
英文摘要:
      Modified BCR extraction procedure and ICP-MS technique were applied to examine the content of Hg and chemical speciation. It was found that the trends of Hg chemical speciation in soil at 3 different depths were similar. The chemical speciation of Hg in soils was dominated by residual form, followed by the oxidizable and reducible forms, and the water-soluble form and acetic-acid-extractable form were less than them. The distribution coefficient of different Hg chemical speciation was residual form (48.28%) > oxidizable form (25.68%) > reducible form (13.35%) > acetic-acid-extractable form (8.38%) > water-soluble form (4.33%). In soil profiles, Hg content in 20~40 cm was high than that in 0~20 cm, and the Hg content in 40~60 cm soil was the least. There was a significant correlation between the concentrations of Hg in available form and total Hg at 3 different depths, however, the related trends at 3 different depths were dissimilar.
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