气候变化领域集成服务门户(CCPortal): Identification of potential sources of elevated PM2.5-Hg using mercury isotopes during haze events

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DOI	10.1016/j.atmosenv.2021.118203
	Identification of potential sources of elevated PM2.5-Hg using mercury isotopes during haze events
	Qiu Y.; Gai P.; Yue F.; Zhang Y.; He P.; Kang H.; Yu X.; Lam P.K.S.; Chen J.; Xie Z.
发表日期	2021
ISSN	1352-2310
卷号	247
英文摘要	Atmospheric mercury (Hg) pollution has become a serious problem in megacities. In this study, we applied Hg isotopes together with backward-trajectory receptor models to investigate the potential sources and transport of elevated PM2.5-Hg during two haze events in autumn (Oct. and Nov. in 2014) and winter (Jan. in 2015). Results showed that the sources and transport patterns of PM2.5-Hg during haze are complex for different seasons. In autumn, the dominant sources were local and/or regional anthropogenic emissions from northern China, whereas the long-range transport contribution of biomass burning originated from northeastern China in 2014 and eastern China in 2015. Notably, the biomass burning from northeastern China served as an important contribution to elevated PM2.5-Hg in winter. Our data set also suggested that the Δ200HgPBM values may be due to heterogeneous photoreactions on the particles emitted by coal burning, smelting, and cement production, along with photooxidation from the upper troposphere, and could be used as a potential indicator of particle-bound mercury sources owing to its contribution to the exhibited variability. Hg isotopes, together with meteorological models, could be employed to trace the sources of particle-bound Hg in the atmosphere. This study provides a new way to explore the potential sources of atmospheric particulate mercury and its vectors during haze evolution. © 2021 Elsevier Ltd
英文关键词	Cement industry; Coal industry; Isotopes; Photooxidation; Anthropogenic emissions; Atmospheric mercury; Atmospheric particulate; Backward trajectory; Long range transport; Meteorological models; Particle bound mercury; Potential indicators; Mercury compounds; Indicator indicator
语种	英语
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169023
作者单位	Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China; Department of Chemistry, State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong; Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou, 215123, China
推荐引用方式 GB/T 7714	Qiu Y.,Gai P.,Yue F.,et al. Identification of potential sources of elevated PM2.5-Hg using mercury isotopes during haze events[J],2021,247.
APA	Qiu Y..,Gai P..,Yue F..,Zhang Y..,He P..,...&Xie Z..(2021).Identification of potential sources of elevated PM2.5-Hg using mercury isotopes during haze events.Atmospheric Environment,247.
MLA	Qiu Y.,et al."Identification of potential sources of elevated PM2.5-Hg using mercury isotopes during haze events".Atmospheric Environment 247(2021).