地球与环境

文章摘要

放射性碳同位素在地表水体有机碳来源示踪中的研究进展

Research Progress of Radiocarbon Isotope in Tracing the Source of Organic Carbon in Surface Water

投稿时间：2021-03-17 修订日期：2021-04-23

DOI：10.14050/j.cnki.1672-9250.2021.49.060

中文关键词: 放射性碳同位素;有机碳;来源;地表水;原理

英文关键词: radiocarbon;organic carbon;source;surface water;principle

基金项目:国家自然科学基金项目（41807394、U1612441）和贵州省科技计划项目（[2020]4Y015、[2018]1174）。

作者	单位	E-mail
唐续尹^1,2, 杨海全¹, 余伟^1,3, 殷超^1,2, 吴嘉曦^1,4, 徐丹¹, 陈敬安¹	1. 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 2. 中国科学院大学, 北京 100049 3. 贵州师范大学地理与环境科学学院, 贵阳 550025 4. 贵州大学资源与环境工程学院, 贵阳 550025	yanghaiquan@vip.skleg.cn

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中文摘要:

随着加速器质谱分析测试技术的不断发展，天然放射性碳同位素（Δ¹⁴C）被广泛应用于地表水环境研究。地表水（河流、湖泊）有机碳循环在全球碳循环中发挥着重要作用。利用放射性碳同位素探究地表水环境有机碳循环，不仅能定量识别有机碳的来源贡献率，还能提供有机碳迁移转化过程的信息。本文综合介绍了放射性碳同位素分析技术原理，比较了溶解有机碳化学前处理三种方法（高温燃烧法、紫外氧化法、化学湿法氧化）的优缺点，系统总结了国内外放射性碳同位素在河流和湖泊系统有机碳循环中的研究进展，并提出国内研究应加强的领域，以及联合利用放射性碳同位素与其他分析测试手段，对地表水体有机碳循环的研究进行展望。

英文摘要:

With the continuous development of accelerator mass spectrometry (AMS) analysis, natural radiocarbon isotopes (Δ¹⁴C) is more and more widely used in surface water environment research. The organic carbon cycle of surface water ecosystems (rivers, lakes) plays an important role in the global carbon cycle. Using radiocarbon isotopes to explore the organic carbon cycle in surface water environments can not only quantitatively identify the source and contribution rate of organic carbon, but also provide information on the migration and transformation process of organic carbon. In this review, the principle of radioisotope analysis technology is comprehensively introduced, and the advantages and disadvantages of three chemical pretreatment methods, namely, high temperature combustion, ultraviolet oxidation, and chemical wet oxidation, for dissolved organic carbon are compared. The research progress of radioisotope in organic carbon cycle in river and lake ecosystems at home and abroad is summarized, and the research fields that should be strengthened in China are put forward. In addition, the combined use of radioisotopes and other analytical methods is also proposed for the research of organic carbon cycle in surface water.

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