IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Chemical characterization and sources of personal exposure to fine particulate matter (PM2.5) in the megacity of Guangzhou, China
Chen, Xiao-Cui1; Jahn, Heiko J.2; Engling, Guenter3; Ward, Tony J.4; Kraemer, Alexander2; Ho, Kin-Fai1,5; Yim, S. H. L.1,6; Chan, Chuen-Yu7
2017-12-01
Source PublicationENVIRONMENTAL POLLUTION
Volume231Issue:Pt1Pages:871-881
SubtypeArticle
AbstractConcurrent ambient and personal measurements of fine particulate matter (PM2.5) were conducted in eight districts of Guangzhou during the winter of 2011. Personal-to-ambient (P-C) relationships of PM2.5 chemical components were determined and sources of personal PM2.5 exposures were evaluated using principal component analysis and a mixed-effects model. Water-soluble inorganic ions (e.g., SO42-, NO3-, NH4+, C2O42-) and anhydrosugars (e.g., levoglucosan, mannosan) exhibited median personal-to-ambient (P/C) ratios < 1 accompanied by strong P-C correlations, indicating that these constituents in personal PM2.5 were significantly affected by ambient sources. Conversely, elemental carbon (EC) and calcium (Ca2+) showed median P/C ratios greater than unity, illustrating significant impact of local traffic, indoor sources, and/or personal activities on individual's, exposure. SO42- displayed very low coefficient of divergence (COD.) values coupled with strong P-C correlations, implying a uniform distribution of SO42- in the urban area of Guangzhou. EC, Ca2+, and levoglucosan were otherwise heterogeneously distributed across individuals in different districts. Regional air pollution (50.4 +/- 0.9%), traffic-related particles (8.6 +/- 0.7%), dust-related particles (5.8 +/- 0.7%), and biomass burning emissions (2.0 +/- 0.2%) were moderate to high positive sources of personal PM2.5 exposure in Guangzhou. The observed positive and significant contribution of Ca2+ to personal PM2.5 exposure, highlighting indoor sources and/or personal activities, were driving factors determining personal exposure to dust-related particles. Considerable discrepancies (COD values ranging from 0.42 to 0.50) were shown between ambient concentrations and personal exposures, indicating caution should be taken when using ambient concentrations as proxies for personal exposures in epidemiological studies. (C) 2017 Elsevier Ltd. All rights reserved.
KeywordPersonal Exposure Chemical Components Principal Component Analysis Mixed-effects Model Source Contribution
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.envpol.2017.08.062
WOS KeywordRIVER DELTA REGION ; INDOOR/OUTDOOR RELATIONSHIPS ; SOURCE APPORTIONMENT ; EPIDEMIOLOGY-EXPOSURE ; SOURCE IDENTIFICATION ; SEASONAL-VARIATIONS ; RESIDENTIAL INDOOR ; ELEMENTAL CARBON ; ORGANIC TRACERS ; BLACK SMOKE
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000414881000089
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5395
Collection黄土与第四纪地质国家重点实验室(2010~)
Affiliation1.Chinese Univ Hong Kong, Inst Environm Energy & Sustainabil, Sha Tin, Hong Kong, Peoples R China
2.Bielefeld Univ, Sch Publ Hlth, Dept Publ Hlth Med, Bielefeld, Germany
3.Desert Res Inst, Div Atmospher Sci, Reno, NV USA
4.Univ Montana, Sch Publ & Community Hlth Sci, Missoula, MT 59812 USA
5.Chinese Univ Hong Kong, Jockey Club Sch Publ Hlth & Primary Care, Hong Kong, Hong Kong, Peoples R China
6.Chinese Univ Hong Kong, Dept Geog & Resource Management, Hong Kong, Hong Kong, Peoples R China
7.Chinese Acad Sci, Inst Earth Environm, Aerosol Lab, SKLLQG, Xian, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Chen, Xiao-Cui,Jahn, Heiko J.,Engling, Guenter,et al. Chemical characterization and sources of personal exposure to fine particulate matter (PM2.5) in the megacity of Guangzhou, China[J]. ENVIRONMENTAL POLLUTION,2017,231(Pt1):871-881.
APA Chen, Xiao-Cui.,Jahn, Heiko J..,Engling, Guenter.,Ward, Tony J..,Kraemer, Alexander.,...&Chan, Chuen-Yu.(2017).Chemical characterization and sources of personal exposure to fine particulate matter (PM2.5) in the megacity of Guangzhou, China.ENVIRONMENTAL POLLUTION,231(Pt1),871-881.
MLA Chen, Xiao-Cui,et al."Chemical characterization and sources of personal exposure to fine particulate matter (PM2.5) in the megacity of Guangzhou, China".ENVIRONMENTAL POLLUTION 231.Pt1(2017):871-881.
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