镉同位素及其环境示踪
Cadmium Isotopes and Environmental Tracing
查看参考文献46篇
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文摘
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随着多道接收电感耦合等离子体质谱仪(MC-ICPMS)的发展和广泛应用,镉(Cd)稳定同位素已成为当前非传统同位素地球化学的研究热点之一。本文对Cd同位素的分析方法、组成特征、变化规律、分馏机制及环境应用等问题进行了系统评述。总体来说,地球样品的Cd同位素组成(δ~(114/110)Cd)分馏较小(-2.47‰~+3.17‰),陨石等地外物质同位素分馏较大(-9.07‰ ~+16.13‰),已发现的分馏过程包括蒸发/冷凝过程、吸附沉淀/溶解过程、生物吸收过程。同时,Cd同位素作为一种全新的地球化学指标,可指示物源、天体演化、海洋初级生产力及营养物质循环、全球碳循环等过程;有效示踪环境介质与生物体中Cd的污染来源,为环境科学的研究提供新的视角和信息。 |
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其他语种文摘
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In the recent years, cadmium (Cd) isotope has been one of the hot issues in the research area of non-traditional isotopes, with the developing and application of multi-collector inductivity coupled plasma mass spectrometry (MC-ICPMS). This paper systematically discussed the analysis method, composition, variation, mechanism of fractionation and the application of Cd isotope. Generally, the terrestrial materials exists small variation of Cd isotope, δ~(114/110)Cd ranges from -2.47‰ to +317‰, but the extraterrestrial materials, meteorolite for example, display significant isotope fractionation effects, and δ~(114/110)Cd ranges from -9.07‰ to +16.13‰. The process of evaporation/condensation, precipitation and biological uptake will lead to Cd isotope fractionation. Summarized the previous publications, it could be concluded that, as a new tool of geochemistry, cadmium isotope could indicate the source materials, cosmogony, primary production and nutrient cycle of ocean, and global carbon cycles. Cadmium isotope also could effectively discriminate the Cd sources of environmental medium and organism, providing new insight and information for the study of environmental sciences. |
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来源
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地球与环境
,2015,43(6):687-696 【核心库】
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DOI
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10.14050/j.cnki.1672-9250.2015.06.013
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关键词
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镉同位素
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分馏
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地球化学
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环境示踪
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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, 550081
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1672-9250 |
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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973计划
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国家自然科学基金
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文献收藏号
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CSCD:5593925
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