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Yoo H.-J.,Incheon Institute of Public Health and Environment | Kim J.,Seoul National University | Yi S.-M.,Seoul National University | Zoh K.-D.,Seoul National University
Atmospheric Environment | Year: 2011

Continuous mass concentrations of black carbon (BC), particulate matter (PM 10 and PM 2.5), CO, NO 2, SO 2, benzene, toluene, and xylene were measured in an industrial area in Incheon City, Korea. Principal component analysis (PCA) results revealed that PC1 had high contributions from PM 10, PM 2.5, CO, and benzene (31.225%), and was strongly associated with vehicular emissions and industrial sources, the major contributors to air pollution in Incheon. PC2 was heavily enriched with NO 2 and BC (24.555%), and was attributed to emissions from vehicles such as buses, vans, taxis, cars, motorcycles, and trucks. PC3 was highly enriched with toluene and xylene (20.884%), and thus represented solvent usage. PC4 was enriched with SO 2 (12.884%), which could be attributed to the high S content in diesel fuel used in trucks, which may contribute to the high ambient levels of SO 2 in the city. Cluster analysis (CA) revealed four subgroups: Cluster 1 (SO 2), Cluster 2 (toluene and xylene), Cluster 3 (NO 2 and BC), and Cluster 4 (PM 10, PM 2.5, CO, and benzene), which agree with the PCA results. This study showed that benzene had a higher correlation with PM 2.5, PM 10, and CO than toluene and xylene, providing insights into source contributions that, together with a source-species atmospheric dispersion model, can be used to devise new control strategies for industrial urban areas. Our results suggest that appropriate vehicle emission management coupled with industrial air pollution control should be applied to fine particulate (PM 2.5) and gaseous pollutants including benzene, toluene, ethylbenzene, and xylenes in the study area. © 2011 Elsevier Ltd. All rights reserved. Source

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