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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
Qian, Ruozhi1,3; Zhang, Shumin2; Peng, Chao1; Zhang, Liuyi3; Yang, Fumo1,4; Tian, Mi1,5; Huang, Rujin6,7; Wang, Qiyuan6,7; Chen, Qingcai8; Yao, Xiaojiang1; Chen, Yang1
Corresponding AuthorChen, Yang(chenyang@cigit.ac.cn)
2020-08-01
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume252Pages:10
AbstractEnvironmentally 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.
KeywordEnvironmentally persistent free radicals (EPFRs) Air pollution Sources Potential exposure risks
DOI10.1016/j.chemosphere.2020.126425
WOS KeywordELECTRON-PARAMAGNETIC-RESONANCE ; SOLUBLE INORGANIC-IONS ; SOURCE APPORTIONMENT ; CIGARETTE-SMOKE ; SPIN-RESONANCE ; MAINSTREAM ; AEROSOL ; CITY ; XIAN ; QUANTIFICATION
Indexed BySCI ; SCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2018YFC0200402] ; Nanchong Science and Technology Project[18SXHZ0573] ; National Natural Science Foundation of China[41703136]
WOS Research AreaEnvironmental Sciences & Ecology
Funding OrganizationNational Key Research and Development Program of China ; Nanchong Science and Technology Project ; National Natural Science Foundation of China
WOS SubjectEnvironmental Sciences
WOS IDWOS:000534377000011
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/14779
Collection粉尘与环境研究室
Corresponding AuthorChen, Yang
Affiliation1.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
Recommended Citation
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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