Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Characteristics of Air Quality in the West Coastal Urban Atmosphere; Characteristics of VOCs Concentration Measured from an Industrial Complex Monitoring Station at Gunsan and a Roadside Station at Jeonju

서해연안 도시지역의 대기질 특성 연구: 군산시 산업단지와 전주시 도로변에서 VOCs 농도분포 특성 연구

  • Ryoo, Jae-Youn (Jeonbuk Institute of Health and Environmental Research) ;
  • Kim, Deug-Soo (Department of Environmental Engineering, Kunsan National University) ;
  • Chae, Soo-Cheon (Jeonbuk Institute of Health and Environmental Research) ;
  • Nam, Tu-Cheon (Jeonbuk Institute of Health and Environmental Research) ;
  • Choi, Yang-Seock (Jeonbuk Institute of Health and Environmental Research)
  • 유재연 (전라북도보건환경연구원) ;
  • 김득수 (군산대학교 환경공학과 대기환경연구실) ;
  • 채수천 (전라북도보건환경연구원) ;
  • 남두천 (전라북도보건환경연구원) ;
  • 최양석 (전라북도보건환경연구원)
  • Received : 2010.06.30
  • Accepted : 2010.09.13
  • Published : 2010.12.31
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Abstract

The study was performed to elucidate the characteristics of VOCs at distinct monitoring sites in urban atmosphere; one is at a roadside in downtown inland city of Jeonju, and the other is at an industrial site in Gunsan near coastal area. The ambient samples were collected for 24 hours in two-bed adsorbent tubes by using MTS-32 sequential tube sampler equipped with Flex air pump every 16 days in a roadside and a industrial complex from February to November in 2009. VOCs were determined by thermal desorption coupled with GC/MSD. Major individual VOCs in roadside samples were shown as following order in magnitude: toluene>m,p-xylene>ethyl benzene>decanal; and those in the industrial complex samples were as follows: toluene>ethanol>ethyl acetate>decanal>m,pxylene. High benzene concentration in the roadside was more frequently occurred than in the industrial complex. However ambient level of toluene in the industrial complex was higher than that in the road side. Results from roadside sample analysis showed that nonane and 1,2,4-trimethylbenzene were very frequently observed with higher concentrations than those in the industrial complex. It seems that nonane and 1,2,4-trimethylbenzene could be the source characteristics for the roadside air. From the diurnal variation, it was found that concentrations of benzene, ethylbenzene, xylene, nonane and 1,2,4-trimethylbenznene in the roadside were higher during rush hours; but those in the industrial complex were higher from 10 to 16 LST when the industrial activities were animated. On weekly base, the concentration of benzene, toluene, ethylbenzene and m,p-xylene in the roadside were higher specifically on Wednesday, but those in the industrial complex were higher on Sunday. It was found that the general trends of VOCs levels at both sites significantly influence on seasonal changes. The results of factor analysis showed that the VOCs in the roadside were mainly affected by the emission of vehicles and the evaporation of diesel fuel, meanwhile those in the industrial complex were influenced by the evaporation of solvents and vehicular emission.

Keywords

References

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