대도시 및 주변 교외지역의 대기 중 휘발성 유기화합물 농도 비교에 관한 연구 = A Study on the Comparison of Atmospheric Concentrations of Volatile Organic Compounds in aLarge Urban Area and a Sub-Urban Area

다국어 초록 (Multilingual Abstract)

This study was carried out to evaluate the temporal variations of VOCs at an urban site, and to compare theconcentrations of VOCs at an urban site in Daegu with those at a suburban site in Gyeongsan. Three hourly VOCsamples in the ambient air were collected using a sequential tube sampler(STS 25, Perkin Elmer) throughout twodetermined by an automatic thermal desorption apparatus with GC/MS analysis. A total of 12 VOCs ofenvironmetal concern were determined, which are chloroform, benzene, trichloroethylene, toluene, tetra-chloroethylene, ethylbenzene, m+ p-xylenes, o-xylene, styrene, 1, 3, 5-and 1, 2, 4-trimethylbenzenes. Among 12concentrations at the urbn site were 1.2ppb for benzene and 20.4 ppb for toluene(n= 221) while the mean levels atthe suburban site were 0.9 ppb and 4.3 ppb for benzene and toluene (n= 96), respectively. The urban siteconcentrations were typically several-fold higher than those measured at the suburban site. It was found thatconcentrations were at their maximum during rush hours, i.e. 9~ 12 a.m and 6~ 9 p.m. Statistical investigationswere conducted to investigate any significant relationships between VOC concentrations and affecting factors.Calculated correlation coefficients among VOCs were positively significant at a level of 0.05 in most cases.Increased concentrations of toluene in the urban site were estimated to reect the effect of large industrial sources,mainly from textile industry.

참고문헌 (Reference)

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