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冰川冻土 ›› 2023, Vol. 45 ›› Issue (1): 80-93.doi: 10.7522/j.issn.1000-0240.2023.0005

• 冰冻圈与全球变化 • 上一篇    下一篇

冰冻圈甲基汞研究进展

唐文君1,4(), 黄杰1,3(), 康世昌2,4, 马明5, 张强弓1,3, 郭军明2, 孙学军6   

  1. 1.中国科学院 青藏高原研究所 青藏高原地球系统与资源环境国家重点实验室,北京 100101
    2.中国科学院 西北生态环境资源研究院 冰冻圈科学国家重点实验室,甘肃 兰州 730000
    3.中国科学院 青藏高原地球科学卓越创新中心,北京 100101
    4.中国科学院大学,北京 100049
    5.西南大学 资源与环境学院,重庆 400715
    6.国科大杭州高等研究院 环境学院,浙江 杭州 310024
  • 收稿日期:2022-04-08 修回日期:2022-06-03 出版日期:2023-02-28 发布日期:2023-02-25
  • 通讯作者: 黄杰 E-mail:tangwenjun@itpcas.ac.cn;huangjie@itpcas.ac.cn
  • 作者简介:唐文君,硕士研究生,主要从事冰冻圈甲基汞研究. E-mail: tangwenjun@itpcas.ac.cn
  • 基金资助:
    中国科学院战略性先导科技专项(A类)(XDA20040500);国家自然科学基金项目(41977335);中国科学院青年创新促进会项目(2018094)

Research progress on methylmercury in the cryosphere

Wenjun TANG1,4(), Jie HUANG1,3(), Shichang KANG2,4, Ming MA5, Qianggong ZHANG1,3, Junming GUO2, Xuejun SUN6   

  1. 1.Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China
    2.State Key Laboratory of Cryospheric Science,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    3.CAS Center for Excellence in Tibetan Plateau Earth Sciences,Beijing 100101,China
    4.University of Chinese Academy of Sciences,Beijing 100049,China
    5.College of Resources and Environment,Southwest University,Chongqing 400715,China
    6.School of Environment,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China
  • Received:2022-04-08 Revised:2022-06-03 Online:2023-02-28 Published:2023-02-25
  • Contact: Jie HUANG E-mail:tangwenjun@itpcas.ac.cn;huangjie@itpcas.ac.cn

摘要:

作为气候系统五大圈层之一,冰冻圈在全球汞的生物地球化学循环中扮演着重要角色。人类活动排放的汞污染物通过大气环流迁移到偏远的冰冻圈地区,并在环境中转化为更具毒性的甲基汞,经食物链传递、富集和放大,会对冰冻圈生态环境构成重大威胁。为了深化理解冰冻圈甲基汞研究现状,本文总结了典型冰冻圈介质甲基汞的浓度水平和分析方法,重点梳理了甲基汞在冰川、冻土、积雪和海冰中的迁移、转化和归趋等生物地球化学过程,特别是对冰冻圈微生物汞甲基化进行了详细的归纳和总结。同时关注气候变化背景下冰冻圈甲基汞分布、行为和环境影响,这对于评估人类和野生生物在冰冻圈中的甲基汞暴露风险至关重要。鉴于目前对低温环境中甲基汞变化过程和机理的认识尚处于起步阶段,文章对未来冰冻圈甲基汞研究方向进行了展望。

关键词: 甲基汞, 冰冻圈, 冰川, 冻土, 积雪, 海冰

Abstract:

The cryosphere is one of the climate system component which plays an important role in the global biogeochemical mercury cycling. Anthropogenic mercury has been transported to remote cold and high regions worldwide through atmospheric circulation, and then transformed into methylmercury in the cryosphere. As one of the highly toxic environmental pollutants, methylmercury can be greatly bioaccumulated and biomagnified through the food web, which potentially poses threats to human and wildlife as well as the global cryospheric environments. In order to gain a full picture of research progress on methylmercury in the cryosphere, our study comprehensively summarized the concentration levels and analytical methods of methylmercury, and biogeochemical processes such as the migration, transformation and fate of methylmercury in various cryospheric environments including glacier, permafrost, snow ice and sea ice. We particularly made the literature review of microbial mercury methylation and evaluated the risk of methylmercury exposure to human and wildlife in the cryosphere. Meanwhile, we focus on distribution, behavior, and environmental effects of methylmercury in the cryosphere against the backdrop of climate change, which is essential for assessing the exposure risk of methylmercury to humans and wildlife. Perspectives of methylmercury researches in the cryosphere have also been highlighted in this review, though there is existing a knowledge gap of biogeochemical methylmercury cycling in the low temperature environments which merits further study.

Key words: methylmercury, cryosphere, glacier, permafrost, snow ice, sea ice

中图分类号: 

  • P343.6