利用 GEOS-Chem 模型解析中国大气汞污染的来源。
Source apportionment of atmospheric mercury pollution in China using the GEOS-Chem model.
机构信息
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; Collaborative Innovation Center for Regional Environmental Quality, Tsinghua University, Beijing 100084, China.
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; Collaborative Innovation Center for Regional Environmental Quality, Tsinghua University, Beijing 100084, China; State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China.
出版信息
Environ Pollut. 2014 Jul;190:166-75. doi: 10.1016/j.envpol.2014.03.011. Epub 2014 Apr 23.
China is the largest atmospheric mercury (Hg) emitter in the world. Its Hg emissions and environmental impacts need to be evaluated. In this study, China's Hg emission inventory is updated to 2007 and applied in the GEOS-Chem model to simulate the Hg concentrations and depositions in China. Results indicate that simulations agree well with observed background Hg concentrations. The anthropogenic sources contributed 35-50% of THg concentration and 50-70% of total deposition in polluted regions. Sensitivity analysis was performed to assess the impacts of mercury emissions from power plants, non-ferrous metal smelters and cement plants. It is found that power plants are the most important emission sources in the North China, the Yangtze River Delta (YRD) and the Pearl River Delta (PRD) while the contribution of non-ferrous metal smelters is most significant in the Southwest China. The impacts of cement plants are significant in the YRD, PRD and Central China.
中国是世界上最大的大气汞（Hg）排放国。需要对其汞排放和环境影响进行评估。本研究更新了中国 2007 年的汞排放清单，并将其应用于 GEOS-Chem 模型，以模拟中国的汞浓度和沉降。结果表明，模拟结果与背景 Hg 浓度的观测值吻合较好。人为源对污染区总汞（THg）浓度的贡献为 35-50%，对总沉降的贡献为 50-70%。敏感性分析评估了电厂、有色金属冶炼厂和水泥厂汞排放对大气汞浓度和沉降的影响。结果表明，电厂是中国北方、长江三角洲（YRD）和珠江三角洲（PRD）地区最重要的汞排放源，而有色金属冶炼厂对中国西南地区的贡献最大。水泥厂对 YRD、PRD 和华中地区的影响显著。
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