| 贵阳市百花水库消落带土壤汞形态分布及风险评价 |
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| 引用本文： | 孙婷,李秋华,唐黎,何应,韩孟书,陈峰峰.贵阳市百花水库消落带土壤汞形态分布及风险评价[J].生态环境学报,2019(4):831-839. |
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| 作者姓名： | 孙婷 李秋华 唐黎 何应 韩孟书 陈峰峰 |
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| 作者单位： | 贵州师范大学地理与环境科学学院;贵州师范大学/贵州省山地环境信息系统和生态环境保护重点实验室;贵州师范大学/贵州省信息与计算科学重点实验室;贵州医科大学公共卫生学院 |
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| 基金项目： | 国家自然科学基金项目(41563012;U1612442);贵州省科技厅项目(黔科合平台人才[2018]5805);贵州省教育厅项目(黔教合KY字[2017]032);民族地理研究专项资金项目(民地科[2013]07) |
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| 摘 要： | 为了解百花水库消落带土壤汞污染风险,系统采集了该区的土壤样品,分析总汞(THg)、汞形态和甲基汞(MeHg)分布情况,探讨汞的生物有效性,并对比分析了土壤THg和汞形态的污染风险。结果表明,百花水库消落带土壤THg质量分数具有显著的空间差异性(n=45,P<0.05)。土壤THg质量分数范围为88.83-521.14μg·kg-1,平均为(226.08±129.62)μg·kg-1。80%的采样点土壤THg质量分数超过了背景水平。土壤中不同形态汞占THg质量分数大小顺序为:强结合态(36.28%)>硫化物结合态(33.09%)>有机结合态(30.35%)>水溶态(0.19%)>胃酸溶态(0.08%),表明前3种形态汞为研究区土壤Hg的主要赋存形态。消落带土壤中生物有效态汞(BioavailableHg,Bio-Hg)质量分数为22.39-168.41μg·kg-1,占THg的比例为8.81%-58.68%。土壤MeHg平均质量分数为(3.70±4.49)μg·kg-1,S15采样点土壤MeHg质量分数显著高于其他采样点(n=45,P<0.05)。地积累指数、潜在生态危害指数和风险评估编码法(Riskassessmentcode,RAC)的评价结果均表明,百花水库消落带土壤汞污染生态较高,S5采样点土壤Bio-Hg质量分数已超过土壤汞背景水平。百花水库消落带土壤的汞污染风险不容忽视。
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| 关 键 词： | 消落带(WLFZ) 汞形态 风险评价 百花水库 |
Distribution and Risk Assessment of Hg Species in Soil of the Water-level-fluctuating Zone in Baihua Reservoir |
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| SUN Ting,LI Qiuhua,TANG Li,HE Ying,HAN Mengshu,CHEN Fengfeng.Distribution and Risk Assessment of Hg Species in Soil of the Water-level-fluctuating Zone in Baihua Reservoir[J].Ecology and Environment,2019(4):831-839. |
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| Authors: | SUN Ting LI Qiuhua TANG Li HE Ying HAN Mengshu CHEN Fengfeng |
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| Institution: | (School of Geography & Environmental Science,Guizhou Normal University,Guiyang 550001,China;Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province/Guizhou Normal University,Guiyang 550001,China;Key Laboratory of Information and Computing Science Guizhou Province/Guizhou Normal University,Guiyang 550001,China;School of Public Health,Guizhou Medical University,Guiyang 550025,China) |
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| Abstract: | SUN Ting;LI Qiuhua;TANG Li;HE Ying;HAN Mengshu;CHEN Fengfeng(School of Geography & Environmental Science,Guizhou Normal University,Guiyang 550001,China;Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province/Guizhou Normal University,Guiyang 550001,China;Key Laboratory of Information and Computing Science Guizhou Province/Guizhou Normal University,Guiyang 550001,China;School of Public Health,Guizhou Medical University,Guiyang 550025,China) |
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| Keywords: | water-level-fluctuating zone(WLFZ) Hg species risk assessment Baihua Reservoir |
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