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| Titel |
Source apportionment of fine organic aerosols in Beijing |
| VerfasserIn |
Q. Wang, M. Shao, Y. Zhang, Y. Wei, M. Hu, S. Guo |
| 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. 21 ; Nr. 9, no. 21 (2009-11-12), S.8573-8585 |
| Datensatznummer |
250007744
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| Publikation (Nr.) |
 copernicus.org/acp-9-8573-2009.pdf |
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| Zusammenfassung |
| Fine particles (PM2.5, i.e., particles with an aerodynamic
diameter of ≤2.5 μm) were collected from the air in August 2005,
August–September 2006, and January–February 2007, in Beijing, China. The
chemical compositions of particulate organic matter in the ambient samples
were quantified by gas chromatography/mass spectrometry. The dominant
compounds identified in summertime were n-alkanoic acids, followed by
dicarboxylic acids and sugars, while sugars became the most abundant species
in winter, followed by polycyclic aromatic hydrocarbons, n-alkanes, and
n-alkanoic acids. The contributions of seven emission sources (i.e.,
gasoline/diesel vehicles, coal burning, wood/straw burning, cooking, and
vegetative detritus) to particulate organic matter in PM2.5 were estimated
using a chemical mass balance receptor model. The model results present the
seasonal trends of source contributions to organic aerosols. Biomass burning
(straw and wood) had the highest contribution in winter, followed by coal
burning, vehicle exhaust, and cooking. The contribution of cooking was the
highest in summer, followed by vehicle exhaust and biomass burning, while
coal smoke showed only a minor contribution to ambient organic carbon. |
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