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Chemical characterization and source apportionment of size-resolved particles in Hong Kong sub-urban area
Gao, Yuan1; Lee, Shun-Cheng1; Huang, Yu2; Chow, Judith C.2,3; Watson, John G.2,3
2016-03-15
Source PublicationATMOSPHERIC RESEARCH
Volume170Issue:2016Pages:112-122
SubtypeArticle
AbstractSize-resolved particulate matter (PM) samples were collected with a 10-stage Micro-Orifice Uniform Deposit Impactor (MOUDI) at a sub-urban site (Tung Chung) in Hong Kong for four non-consecutive months representing four seasons from 2011 to 2012. Major chemical components were water-soluble anions (i.e., Cl-, NO3-, and SO42-), cations (i.e., NH4+, Na+, K+, and Ca2+), organic and elemental carbon and elements. Both chemical mass closure and positive matrix factorization (PMF) were employed to understand the chemical composition, resolve particle size modes, and evaluate the PM sources. Tri-modal size distributions were found for PM mass and major chemical components (e.g., SO42-, NH4+, and OC). Mass median aerodynamic diameters (MMADs) with similar standard deviations (1.32 < sigma < 1.42) were 0.4, 0.7 and 3.8 mu m, consistent with condensation, droplet and coarse modes. A bi-modal distribution peaking at condensation and droplet modes was found for EC, with a single mode peaking at 3.8 mu m for Cl-. Besides secondary SO42-, carbonaceous aerosol dominated the condensation mode with 27% by engine exhaust and 18-19% each by residual oil combustion (shipping) and coal/biomass burning. Secondary SO42- is also the most dominant component in the droplet mode, accounting for 23% of PM mass, followed by an industrial source (19%). Engine exhaust, secondary NO3-, and sea salt each accounted for 13-15% of PM mass. Sea salt and soil are the dominated sources in the coarse mode, accounting for similar to 80% of coarse mass. (C) 2015 Elsevier B.V. All rights reserved.
KeywordAerosol Size Distribution Inorganic Ions Carbonaceous Aerosol Moudi Pmf
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.atmosres.2015.11.015
WOS KeywordPOSITIVE MATRIX FACTORIZATION ; PEARL RIVER-DELTA ; PARTICULATE SULFATE ; ELEMENTAL CARBON ; URBAN AREA ; ATMOSPHERIC PARTICLES ; SAMPLING ARTIFACTS ; REGIONAL POLLUTION ; CENTRAL CALIFORNIA ; IONIC COMPOSITIONS
Indexed BySCI
Language英语
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000368866500011
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5839
Collection粉尘与环境研究室
Affiliation1.Hong Kong Polytech Univ, Res Inst Sustainable Urban Dev, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710075, Peoples R China
3.Desert Res Inst, Div Atmospher Sci, 2215 Raggio Pkwy, Reno, NV 89512 USA
Recommended Citation
GB/T 7714
Gao, Yuan,Lee, Shun-Cheng,Huang, Yu,et al. Chemical characterization and source apportionment of size-resolved particles in Hong Kong sub-urban area[J]. ATMOSPHERIC RESEARCH,2016,170(2016):112-122.
APA Gao, Yuan,Lee, Shun-Cheng,Huang, Yu,Chow, Judith C.,&Watson, John G..(2016).Chemical characterization and source apportionment of size-resolved particles in Hong Kong sub-urban area.ATMOSPHERIC RESEARCH,170(2016),112-122.
MLA Gao, Yuan,et al."Chemical characterization and source apportionment of size-resolved particles in Hong Kong sub-urban area".ATMOSPHERIC RESEARCH 170.2016(2016):112-122.
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