Combating air pollution significantly reduced air mercury concentrations in China  

作　　者：Xinbin Feng Xuewu Fu Hui Zhang Xun Wang Longyu Jia Leiming Zhang Che-Jen Lin Jen-How Huang Kaiyun Liu Shuxiao Wang 

机构地区：[1]State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Air Quality Research Division,Science and Technology Branch,Environment and Climate Change Canada,Toronto M3H 5T4,Canada [4]Center for Advances in Water and Air Quality,Lamar University,Beaumont,TX 77710,USA [5]State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China [6]College of Environmental Science and Engineering,North China Electric Power University,Beijing 102206,China

出　　处：《National Science Review》2024年第9期196-206,共11页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China(42394092);the National Basic Research Program(973 Program)of China(2013CB430003);the Strategic Priority Research Program(XDB40000000);the Key Research Program of Frontier Science(ZDBS-LY-DQC029)of Chinese Academy of Sciences.

摘　　要：In the past decade,China has motivated proactive emission control measures that have successfully reduced emissions of many air pollutants.For atmospheric mercury,which is a globally transported neurotoxin,much less is known about the long-term changes in its concentrations and anthropogenic emissions in China.In this study,over a decade of continuous observations at four Chinese sites show that gaseous elemental mercury(GEM)concentrations continuously increased until the early 2010s,followed by significant declines at rates of 1.8%-6.1%yr^(-1) until 2022.The GEM decline from 2013 to 2022(by 38.6%±12.7%)coincided with the decreasing concentrations of criteria air pollutants in China and were larger than those observed elsewhere in the northern hemisphere(5.7%-14.2%).The co-benefits of emission control measures contributed to the reduced anthropogenic Hg emissions and led to the GEM decline in China.We estimated that anthropogenic GEM emissions in China were reduced by 38%-50%(116-151 tons)from 2013 to 2022 using the machine-learning and relationship models.

关 键 词：atmospheric mercury long-term trend anthropogenic emission reductions co-benefits of clean air action 

分 类 号：X51[环境科学与工程—环境工程]