Projections of atmospheric mercury emission trends in China's nonferrous metalsing industry
WU Qing-ru1,2, WANG Shu-xiao1,2, WANG Yu-jing3
1. State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China;
2. State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China;
3. Solid Waste and Chemicals Management Technology Center of Ministry of Environmental Protection of China, Beijing 100029, China
This study predicted the atmospheric mercury emission trends of China's nonferrous metal smelting industry under different scenarios and analyzed the contributions of main emission abatement measures.The mercury reduction potential in 2030 will reach 122.3t,which is 82.9% of the emissions in 2012.Atmospheric mercury emissions from zinc,lead,and copper smelters will be reduced by 77.8,42.7,and 1.8t,respectively.To achieve the emission reduction of atmospheric Hg,zinc smelters will mainly improve air pollution control devices.Atmospheric mercury emissions will reduce 51.0 and 23.9t through this measure by 2020 and 2030.Copper smelters will largely replace primary production with secondary production to reduce mercury emissions.The reduction proportion will reach 61.1% and 72.5% by 2020 and 2030 through this measure.For the emission control of lead smelters,the major measures are to eliminate the backward production capacity and to improve air pollution control devices before 2020,contributing to 88.8% of total emission reduction.During 2020~2030,increasing the proportion of secondary production will be the most effective measures for lead smelters and will contribute to 65.3% of total emission reduction.
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