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| Titel |
Source apportionment of PM2.5 in Seoul, Korea |
| VerfasserIn |
J.-B. Heo, P. K. Hopke, S.-M. Yi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 9, no. 14 ; Nr. 9, no. 14 (2009-07-27), S.4957-4971 |
| Datensatznummer |
250007526
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| Publikation (Nr.) |
 copernicus.org/acp-9-4957-2009.pdf |
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| Zusammenfassung |
| PM2.5 samples were collected at a centrally located urban monitoring
site in Seoul, Korea, every third day from March 2003 to December 2006 and
analyzed for their chemical constituents. Sources were identified using
positive matrix factorization (PMF). A total of 393 samples were obtained
during the sampling period, and 20 chemical species were measured. Nine
PM2.5 source categories were identified providing physically realistic
profiles and interesting insights into the source contributions to the
ambient mass concentrations. The major contributors of PM2.5 were
secondary nitrate (20.9%), secondary sulfate (20.5%), gasoline-fueled
vehicles (17.2%), and biomass burning (12.1%), with lesser
contributions from diesel emissions (8.1%), soil (7.4%), industry
(6.7%), road salt and two-stroke vehicles (5.1%), and aged sea salt
(2.2%). PM2.5 levels in Seoul were influenced by both local urban
activities and regional-scale transport. Conditional probability function
(CPF) results identified possible source directions of local sources such as
motor vehicles (gasoline and diesel), industry, and road salt. Potential
source contribution function (PSCF) results showed that possible source
areas contributing to the elevated secondary particle concentrations
(sulfate and nitrate) in Seoul to be the major industrial areas in China. |
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