摘要
活性气态汞(Reactive gaseous mercury, RGM),在大气环境中通常被认为是气态的氧化汞,主导大气汞沉降过程,对汞的全球循环至关重要。本文详细介绍了RGM的多种采样和分析方法,讨论并比较了当前技术的优势和局限性;对RGM在大气中的生成、赋存、清除等环境过程以及相关的机制进行了梳理,并探究各过程在大气汞循环过程中的贡献。针对当前RGM分析的难点(如赋存浓度低、采集困难)与关键科学问题(如赋存形态与转化),需着力发展实际环境中RGM采集和形态分析的可行方法,进而深入探究其环境行为。大气中RGM的分析方法和环境行为研究是极具挑战性的任务,将是未来大气汞研究的重要内容之一,对于深入理解RGM在大气汞循环过程中的作用具有重要的意义。
Reactive gaseous mercury(RGM), also known as gaseous oxidized mercury, dominates atmospheric mercury deposition and is critical to the global cycle of mercury. This review introduces various sampling and analysis methods of RGM in detail, and discusses the advantages and limitations of the current techniques. The environmental processes including the formation, occurrence, and depletion of RGM in the atmosphere and related mechanisms are reviewed, and the contribution of each process in the atmospheric mercury cycle is explored. In view of the current analytical difficulties of RGM(e.g., ultralow concentration and sampling problems) and key scientific issues(e.g., chemical form and transformation) in the RGM research, efforts should be made to develop the feasible methods for RGM collection and speciation determinatiton in the real environment, so as to further explore its environmental behavior. This is challenging but important for the research of atmospheric mercury and will be helpful for understanding the role of RGM in cycle processes of atmospheric mercury.
作者
方莹莹
王颖
史建波
阴永光
蔡勇
江桂斌
Yingying Fang;Ying Wang;Jianbo Shi;Yongguang Yin;Yong Cai;Guibin Jiang(Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;University of Chinese Academy of Sciences,Beijing 100049,China;Department of Chemistry and Biochemistry,Florida International University,Miami,Florida 33199,United States;School of Environment,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310000,China)
出处
《化学进展》
SCIE
CAS
CSCD
北大核心
2021年第1期151-161,共11页
Progress in Chemistry
基金
国家自然科学基金项目(No.21976193)
中科院前沿科学重点研究计划(No.QYZDB-SSWDQC018)
中科院创新交叉团队(No.JCTD-2018-04)
中科院青年创新促进会(No.2016037)资助
万人计划青年拔尖人才(No.W03070030)。
关键词
活性气态汞
采样
分析
形态
赋存
清除
reactive gaseous mercury
sampling
analysis
chemical species
occurrence
depletion
