同位素标记在汞的生物地球化学研究中的应用
Applications of isotopic labeling technique in the studies of mercury biogeochemistry: A review
查看参考文献63篇
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文摘
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汞是一种可以长距离迁移的全球性污染物,无机汞进入水生环境可以转化为高神经毒素的甲基汞,通过在食物链中发生生物积累和生物放大作用,并最终威胁人体健康。同位素具有示踪特性,在环境中人为添加放射性汞同位素或单一富集稳定汞同位素标记的单质汞或汞化合物,研究汞同位素的行为特征可以揭示生态环境中汞的生物地球化学行为。汞同位素标记技术的发展和应用为环境中汞的迁移和转化研究,尤其复杂环境中汞的形态转化和归趋提供了有效手段。本文介绍了放射性汞同位素标记技术和单一富集稳定汞同位素标记技术的原理,汞同位素标记技术在环境样品和生物样品的汞形态分析,陆地系统中土壤-植物-大气之间汞的迁移与转化,水生生态系统大气沉降汞的迁移和转化、汞的甲基化作用及形态汞的生物富集等领域的主要研究成果,并展望了汞同位素标记技术的应用前景。 |
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其他语种文摘
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As a global pollutant, mercury (Hg) can be transported for a long distance in atmosphere. Methyl-mercury (MeHg), an extremely toxic organic form of Hg formed by the methylation from inorganic Hg in aquatic environment, can be bio-accumulated and bio-magnified along food chains, potentially threatening human health. Isotopes can trace the behaviors of elements in the environment. Adding Hg isotope to the environment or using Hg isotopic labeling technique is a powerful tool for the studies of Hg biogeochemical behaviors, including the transportation and transformation of Hg in the environment. This paper reviewed the basic theory of Hg isotopic labeling technique, the applications of this technique in sample Hg species analysis, and the Hg transportation/ transformation in soil-plant-atmosphere system and in aquatic ecosystem, and prospected the applications of Hg isotopic labeling technique in the studies of Hg environmental geochemistry. |
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来源
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生态学杂志
,2013,32(5):1335-1346 【核心库】
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关键词
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汞
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示踪
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添加
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迁移/ 转化
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甲基化
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去甲基化
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地址
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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
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语种
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中文 |
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文献类型
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综述型 |
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ISSN
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1000-4890 |
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学科
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环境科学基础理论 |
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基金
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国家自然科学基金
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贵州省自然科学基金
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文献收藏号
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CSCD:4840022
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63
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