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Diurnal characteristics of volatile organic compounds in the Seoul atmosphere

Title
Diurnal characteristics of volatile organic compounds in the Seoul atmosphere
Authors
Na K.Kim Y.P.Moon K.C.
Ewha Authors
김용표
SCOPUS Author ID
김용표scopus
Issue Date
2003
Journal Title
Atmospheric Environment
ISSN
1352-2310JCR Link
Citation
vol. 37, no. 6, pp. 733 - 742
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Concentrations of volatile organic compounds (VOCs) were measured at a site in central Seoul from 8 to 13 September 1998. On each sampling day, three 2-h-integrated canister samples were collected in the morning, afternoon and evening, respectively, to observe diural variations of VOCs. Most of the VOCs species showed diurnal variations with higher concentrations during the morning and evening, and lower concentrations during the afternoon. However, in the afternoon, the concentrations of aromatic compounds, closely correlated with solvent usage such as toluene, ethylbenzene, m-/p-xylene, and o-xylene, were slightly higher than or comparable to those in the morning. This may be due to the increase of evaporative emissions derived from the rise in ambient temperature and additional sources such as the use of solvents in painting, printing and dry cleaning. To estimate the participation of individual VOCs in ozone formation, propylene equivalent concentrations were calculated. The results showed that toluene was the most dominant contributor to ozone formation as well as ambient VOC concentrations. Toluene/benzene and m-/p-xylene/benzene ratios showed a high observed in the afternoon and a low observed in the morning and evening. This may be because the contribution of evaporative emissions by solvent usage on the ambient VOC concentrations is more dominant than those of vehicle-related emissions and photochemical loss. © 2002 Elsevier Science Ltd. All rights reserved.
DOI
10.1016/S1352-2310(02)00956-1
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엘텍공과대학 > 화학신소재공학전공 > Journal papers
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