Differentiated emission control strategy based on comprehensive evaluation of multi-media pollution:Case of mercury emission control  

作　　者：Dongwei Lv Qingru Wu Daiwei Ouyang Minneng Wen Gehui Zhang Shuxiao Wang Lei Duan 

机构地区：[1]State Key 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

出　　处：《Journal of Environmental Sciences》2023年第1期222-234,共13页环境科学学报（英文版）

基　　金：supported by the National Key Research and Development Project(Nos.2019YFC0214800 and 2017YFC0210500)。

摘　　要：In order to comprehensively evaluate the environmental impact of multi-media mercury pollution under differentiated emission control strategies in China,a literature review and case studies were carried out.Increased human exposure to methylmercury was assessed through the dietary intake of residents in areas surrounding a typical coal-fired power plant and a zinc(Zn)smelter,located either on acid soil with paddy growth in southern China,or on alkaline soil with wheat growth in northern China.Combined with knowledge on speciated mercury in flue gas and the fate of mercury in the wastewater or solid waste of the typical emitters applying different air pollution control devices,a simplified model was developed by estimating the incremental daily intake of methylmercury from both local and global pollution.Results indicated that air pollution control for coal-fired power plants and Zn smelters can greatly reduce health risks from mercury pollution,mainly through a reduction in global methylmercury exposure,but could unfortunately induce local methylmercury exposure by transferring more mercury from flue gas to wastewater or solid waste,then contaminating surrounding soil,and thus increasing dietary intake via crops.Therefore,tightening air emission control is conducive to reducing the comprehensive health risk,while the environmental equity between local and global pollution control should be fully considered.Rice in the south tends to have higher bioconcentration factors than wheat in the north,implying the great importance of strengthening local pollution control in the south,especially for Zn smelters with higher contribution to local pollution.

关 键 词：Mercury emission METHYLMERCURY Heavy metal Bioconcentration factor Estimated daily intake Health risk assessment 

分 类 号：X51[环境科学与工程—环境工程]