气候变化领域集成服务门户(CCPortal): Size-resolved exposure risk of persistent free radicals (PFRs) in atmospheric aerosols and their potential sources

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DOI	10.5194/acp-20-14407-2020
	Size-resolved exposure risk of persistent free radicals (PFRs) in atmospheric aerosols and their potential sources
	Chen Q.; Sun H.; Song W.; Cao F.; Tian C.; Zhang Y.L.
发表日期	2020
ISSN	1680-7316
起始页码	14407
结束页码	14417
卷号	20 期号:22
英文摘要	Environmentally persistent free radicals (EPFRs) are a new type of substance with potential health risks. EPFRs are widely present in atmospheric particulates, but there is a limited understanding of the size-resolved health risks of these radicals. This study reports the exposure risks and source of EPFRs in atmospheric particulate matter (PM) of different particle sizes (10 um) in Linfen, a typical coalburning city in China. The type of EPFRs in fine particles (2.1 um) is different from that in coarse particles (2.1 10 um) in both winter and summer. However, the EPFR concentration is higher in coarse particles than in fine particles in summer, and the opposite trend is found in winter. In both seasons, combustion sources are the main sources of EPFRs, with coal combustion as the major contributor in winter, while other fuels are the major source in summer. Dust contributes part of the EPFRs, and it is mainly present in coarse particles in winter and the opposite in summer. The upper respiratory tract was found to be the area with the highest risk of exposure to EPFRs of the studied aerosols, with an exposure equivalent to that of approximately 21 cigarettes per person per day. Alveolar exposure to EPFRs is equivalent to 8 cigarettes per person per day, with combustion sources contributing the most to EPFRs in the alveoli. This study helps us to better understand the potential health risks of atmospheric PM with different particle sizes. © 2020 BMJ Publishing Group. All rights reserved.
英文关键词	aerosol; coal-fired power plant; combustion; concentration (composition); free radical; health risk; particle size; point source; China
语种	英语
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/168945
作者单位	School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China; Yale-NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information Science and Technology, Nanjing, 210044, China; Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China
推荐引用方式 GB/T 7714	Chen Q.,Sun H.,Song W.,et al. Size-resolved exposure risk of persistent free radicals (PFRs) in atmospheric aerosols and their potential sources[J],2020,20(22).
APA	Chen Q.,Sun H.,Song W.,Cao F.,Tian C.,&Zhang Y.L..(2020).Size-resolved exposure risk of persistent free radicals (PFRs) in atmospheric aerosols and their potential sources.Atmospheric Chemistry and Physics,20(22).
MLA	Chen Q.,et al."Size-resolved exposure risk of persistent free radicals (PFRs) in atmospheric aerosols and their potential sources".Atmospheric Chemistry and Physics 20.22(2020).