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陈吉,李秋华,李仲根,王明猛. 河北省衡水湖沉积物中汞的分布特征及生态风险[J]. 生态毒理学报, 2014, 9(5): 908-915
河北省衡水湖沉积物中汞的分布特征及生态风险
Distribution and Risk Assessment of Mercury in the Sediments of Hengshuihu Lake, Hebei Province
投稿时间:2014-05-15  修订日期:2014-07-15
DOI:10.7524/AJE.1673-5897.20140515004
中文关键词:  衡水湖  湖泊沉积物  汞含量  生态风险
英文关键词:Hengshuihu Lake  sediment of freshwater lake  mercury content  ecological risk
基金项目:国家自然科学基金项目(41373056);国家重点基础研究发展计划(973)项目(2013CB430001)
作者单位
陈吉 1. 贵州师范大学山地环境重点实验室贵阳 550001 2. 中国地质大学(武汉)地球科学学院武汉 430074 3. 中国科学院地球化学研究所环境地球化学国家重点实验室贵阳 550002 
李秋华 贵州师范大学山地环境重点实验室贵阳 550001 
李仲根 中国科学院地球化学研究所环境地球化学国家重点实验室贵阳 550002 
王明猛 太原理工大学环境科学与工程学院太原 030024 
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中文摘要:
      衡水湖是华北平原上第一个国家级内陆淡水湖泊湿地类型的自然保护区,为了解衡水湖沉积物中汞的分布特征及生态风险,于2013年8月在衡水湖采集了5根柱状沉积物,对其中的总汞、甲基汞、孔隙水溶解态汞、有机质、pH以及含水率进行了分析。结果表明,衡水湖沉积物中总汞的平均含量为22.5 ng·g-1,低于全国及河北省表层土壤背景值。但表层沉积物汞含量明显高于底层,说明近年来的外源汞输入对湖泊汞负荷产生了一定影响,且靠近湖泊东部106国道的采样点汞含量明显高于湖泊中西部的采样点,暗示交通运输等人为活动是该湖泊的一个重要汞输入源。利用潜在生态危害指数法进行评估,显示汞的生态风险较低,说明现阶段衡水湖的沉积物汞浓度不会对生态环境产生不利影响。
           
AuthorAffiliation
Chen Ji1. Key Laboratory of Mountain Environment, Guizhou Normal University, Guiyang 550001, China 2. Faculty of Earth Science, China University of Geosciences, Wuhan 430074 3. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
Li QiuhuaKey Laboratory of Mountain Environment, Guizhou Normal University, Guiyang 550001, China
Li ZhonggenState Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
Wang MingmengCollege of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
英文摘要:
      Hengshuihu Lake is the first national inland freshwater wetland nature reserve in North China Plain. To reveal the status of mercury distribution and ecological risk in sediments of Hengshuihu lake, we collected five columnar sediment cores in August 2013. The total mercury, methyl mercury, dissolved mercury in pore waters, organic matter, pH and moisture content were analyzed. The average total mercury content in the sediments was 22.5 ng·g-1, which is lower than the national and Hebei Provincial surface soil background value. Within in the sediment cores, the mercury in the upper layer was higher than that of the lower parts, hinting the recent input by human activities. Meanwhile, the total mercury in the sediment cores in eastern part of the lake, which is closer to the national highway 106, was significantly higher than the central and western sites, indicating that the transportation has important impacts on the Hg accumulation. Nevertheless, based on potential ecological harm index assessment, ecological risk by mercury in the sediment was very low. This suggests there is no adverse ecological impact on the lake environment at this stage.
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