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

文献类型：期刊论文

作者Qian, Ruozhi1,6; Zhang, Shumin7; Peng, Chao6; Zhang, Liuyi1; Yang, Fumo6,8; Tian, Mi2,6; Huang, Rujin3,4; Wang, Qiyuan3,4; Chen, Qingcai5; Yao, Xiaojiang6
刊名CHEMOSPHERE
出版日期2020-08-01
卷号252页码:10
ISSN号0045-6535
关键词Environmentally persistent free radicals (EPFRs) Air pollution Sources Potential exposure risks
DOI10.1016/j.chemosphere.2020.126425
通讯作者Chen, Yang(chenyang@cigit.ac.cn)
英文摘要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.
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
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000534377000011
源URL[http://119.78.100.138/handle/2HOD01W0/11129]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Chen, Yang
作者单位1.Chongqing Three Gorges Univ, Chongqing Key Lab Water Environm Evolut & Pollut, Wanzhou 404000, Peoples R China
2.Chongqing Univ, Sch Urban Construct & Environm Engn, Chongqing 400044, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol SKLLQG, Xian 710075, Peoples R China
4.Chinese Acad Sci, Key Lab Aerosol Chem & Phys KLACP, Inst Earth Environm, Xian 710075, Peoples R China
5.Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Peoples R China
6.Chinese Acad Sci, Res Ctr Atmospher Environm, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
7.North Sichuan Med Coll, Sch Basic Med Sci, Nanchong 637000, Sichuan, Peoples R China
8.Sichuan Univ, Coll Architecture & Environm, Natl Engn Res Ctr Flue Gas Desulfurizat, Chengdu 610065, 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.

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来源：重庆绿色智能技术研究院

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