Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Concentration and Properties of Particulate Matters (PM10 and PM2.5) in the Seoul Metropolitan

서울시 지하철 시스템 내의 입자상물질(PM10, PM2.5) 농도 특성

  • Lee, Tae-Jung (Department of Environmental Science and Engineering and Center for Environmental Studies, Kyung Hee University, Global Campus) ;
  • Lim, Hyoji (Department of Environmental Science and Engineering and Center for Environmental Studies, Kyung Hee University, Global Campus) ;
  • Kim, Shin-Do (Department of Environmental Engineering, University of Seoul) ;
  • Park, Duck-Shin (Eco-transport Research Division, Korea Railroad Research Institute) ;
  • Kim, Dong-Sool (Department of Environmental Science and Engineering and Center for Environmental Studies, Kyung Hee University, Global Campus)
  • 이태정 (경희대학교 환경공학과 및 환경연구소) ;
  • 임효지 (경희대학교 환경공학과 및 환경연구소) ;
  • 김신도 (서울시립대학교 환경공학과) ;
  • 박덕신 (한국철도기술연구원 에코시스템연구실) ;
  • 김동술 (경희대학교 환경공학과 및 환경연구소)
  • Received : 2015.04.01
  • Accepted : 2015.04.14
  • Published : 2015.04.30
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Abstract

Seoul subway plays an important part for the public transportation service in Seoul metropolitan area. As the subway system is typically a closed environment, frequent air pollution problems occurred and passengers get malhealth impact. Especially particulate matters (PM) is well known as one of the major pollutants in subway environments. The purpose of this study was to compare the concentrations of $PM_{10}$ and $PM_{2.5}$ in the Seoul subway system and to provide fundamental data in order to management of subway system. $PM_{10}$ and $PM_{2.5}$ samples were collected in the M station platform and tunnel of Subway Line 4 in Seoul metropolitan and in an outdoor location close to it from Apr. 21, 2010~Oct. 27, 2013. The samples collected on teflon filters using $PM_{10}$ and $PM_{2.5}$ mini-volume portable samplers and PM sequential sampler. The PM contributions were $48.6{\mu}g/m^3$ (outdoor), $84.6{\mu}g/m^3$ (platform) and $204.8{\mu}g/m^3$ (tunnel) for $PM_{10}$, and $34.6{\mu}g/m^3$ (outdoor), $49.7{\mu}g/m^3$ (platform) and $83.1{\mu}g/m^3$ (tunnel) for $PM_{2.5}$. The $PM_{10}$ levels inside stations and outdoors are poorly correlated, indicating that $PM_{10}$ levels in the metro system are mainly influenced by internal sources. In this study, we compared PM concentrations before and after operation of ventilation and Electrostatic Precipitator (EP). Despite the increased PM concentration at outdoor, $PM_{10}$ concentration at platform and tunnel showed the 31.2% and 32.3% reduction efficiency after operation the reduction system. The overall results of this study suggest that the installation and operation of the ventilating system and EP should have served as one of the important components for maintaining the air quality in the subway system.

Keywords

References

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