Characteristics and potential exposure risks of environmentally persistent free radicals in PM2.5 in the three gorges reservoir area, Southwestern China

doi:10.1016/j.chemosphere.2020.126425

IEECAS OpenIR > 粉尘与环境研究室

	Characteristics and potential exposure risks of environmentally persistent free radicals in PM2.5 in the three gorges reservoir area, Southwestern China
	Qian, Ruozhi 1,3; Zhang, Shumin 2; Peng, Chao 1; Zhang, Liuyi 3; Yang, Fumo 1,4; Tian, Mi 1,5; Huang, Rujin 6,7; Wang, Qiyuan 6,7; Chen, Qingcai 8; Yao, Xiaojiang 1; Chen, Yang 1
通讯作者	Chen, Yang(chenyang@cigit.ac.cn)
	2020-08-01
发表期刊	CHEMOSPHERE
ISSN	0045-6535
卷号	252 页码:10
摘要	Environmentally persistent free radicals (EPFRs) are a novel class of hazardous substances that can exist stably in airborne particles for a period ranging from days to weeks and are potentially toxic to human health. Electron paramagnetic resonance spectroscopy (EPR) was used to characterize particulate EPFRs in Wanzhou in the Three Gorges Reservoir area in 2017. During the whole of 2017, the average concentration of particulate EPFRs was 7.0 x 10(13) +/- 1.7 x 10(13) spins/m(3). The seasonal concentration of EPFRs in PM2.5 showed a trend of autumn > winter > spring > summer. The maxima and minima of EPFRs occurred in spring with concentrations of 2.1 x 10(14) spins/m(3 )and 9.4 x 10(12) spins/m(3)respectively. The EPFRs in PM2.5 were mainly carbon-centered radicals with adjacent oxygen atoms. Significant positive correlations were found between EPFRs and SO42-, NO3- and NH4+ (r> 0.55, n = 111), indicating that EPFRs are associated with secondary sources. The atmospheric processing of particles from coal combustion, traffic, and agriculture were important sources of EPFRs. They were also particularly well correlated with K+ and Cl- in winter, suggesting that EPFRs may also be derived from wintertime biomass burning emissions. The amount of inhalable EPFRs in Wanzhou was equivalent to the range of 2.3-6.8 cigarettes per capita per day. This study provides evidence of the potential health risks of EPFRs in PM2.5, and references for air pollution control in the Three Gorges Reservoir area. (C) 2020 Elsevier Ltd. All rights reserved.
关键词	Environmentally persistent free radicals (EPFRs) Air pollution Sources Potential exposure risks
DOI	10.1016/j.chemosphere.2020.126425
关键词[WOS]	ELECTRON-PARAMAGNETIC-RESONANCE ; SOLUBLE INORGANIC-IONS ; SOURCE APPORTIONMENT ; CIGARETTE-SMOKE ; SPIN-RESONANCE ; MAINSTREAM ; AEROSOL ; CITY ; XIAN ; QUANTIFICATION
收录类别	SCI ; SCI
语种	英语
资助项目	National Key Research and Development Program of China[2018YFC0200402] ; Nanchong Science and Technology Project[18SXHZ0573] ; National Natural Science Foundation of China[41703136]
WOS研究方向	Environmental Sciences & Ecology
项目资助者	National Key Research and Development Program of China ; Nanchong Science and Technology Project ; National Natural Science Foundation of China
WOS类目	Environmental Sciences
WOS记录号	WOS:000534377000011
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/14779
专题	粉尘与环境研究室
通讯作者	Chen, Yang
作者单位	1.Chinese Acad Sci, Res Ctr Atmospher Environm, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 2.North Sichuan Med Coll, Sch Basic Med Sci, Nanchong 637000, Sichuan, Peoples R China 3.Chongqing Three Gorges Univ, Chongqing Key Lab Water Environm Evolut & Pollut, Wanzhou 404000, Peoples R China 4.Sichuan Univ, Coll Architecture & Environm, Natl Engn Res Ctr Flue Gas Desulfurizat, Chengdu 610065, Peoples R China 5.Chongqing Univ, Sch Urban Construct & Environm Engn, Chongqing 400044, Peoples R China 6.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol SKLLQG, Xian 710075, Peoples R China 7.Chinese Acad Sci, Key Lab Aerosol Chem & Phys KLACP, Inst Earth Environm, Xian 710075, Peoples R China 8.Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Peoples R China
推荐引用方式 GB/T 7714	Qian, Ruozhi,Zhang, Shumin,Peng, Chao,et al. Characteristics and potential exposure risks of environmentally persistent free radicals in PM2.5 in the three gorges reservoir area, Southwestern China[J]. CHEMOSPHERE,2020,252:10.
APA	Qian, Ruozhi.,Zhang, Shumin.,Peng, Chao.,Zhang, Liuyi.,Yang, Fumo.,...&Chen, Yang.(2020).Characteristics and potential exposure risks of environmentally persistent free radicals in PM2.5 in the three gorges reservoir area, Southwestern China.CHEMOSPHERE,252,10.
MLA	Qian, Ruozhi,et al."Characteristics and potential exposure risks of environmentally persistent free radicals in PM2.5 in the three gorges reservoir area, Southwestern China".CHEMOSPHERE 252(2020):10.