Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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A Study on the Characteristics of Carbonaceous Compounds in PM2.5 Measured in Chuncheon and Seoul

춘천과 서울에서 측정한 PM2.5 내 탄소성분의 농도 특성에 관한 연구

  • Jung, Jin-Hee (Department of Environmental Science, College of Natural Science, Kangwon National University) ;
  • Kim, Sung-Rak (Department of Environmental Science, College of Natural Science, Kangwon National University) ;
  • Choi, Bo-Ra (Department of Environmental Health, School of Public Health, Seoul National University) ;
  • Kim, Kye-Sun (Department of Environmental Health, School of Public Health, Seoul National University) ;
  • Huh, Jong-Bae (Department of Environmental Health, School of Public Health, Seoul National University) ;
  • Yi, Seung-Muk (Department of Environmental Health, School of Public Health, Seoul National University) ;
  • Han, Young-Ji (Department of Environmental Science, College of Natural Science, Kangwon National University)
  • 정진희 (강원대학교 자연과학대학 환경과학과) ;
  • 김성락 (강원대학교 자연과학대학 환경과학과) ;
  • 최보라 (서울대학교 보건대학원 환경보건학과) ;
  • 김계선 (서울대학교 보건대학원 환경보건학과) ;
  • 허종배 (서울대학교 보건대학원 환경보건학과) ;
  • 이승묵 (서울대학교 보건대학원 환경보건학과) ;
  • 한영지 (강원대학교 자연과학대학 환경과학과)
  • Published : 2009.04.30
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Abstract

$PM_{2.5}$ samples were collected from December 2005 through November 2007 in two cities including Chuncheon and Seoul in order to investigate the characteristics of carbonaceous aerosol. The average $PM_{2.5}$ concentration in Seoul ($43.2{\mu}g/m^3$) was approximately 1.2 times higher than that measured in Chuncheon ($36.1{\mu}g/m^3$), however there was no statistical difference on $PM_{2.5}$ concentration between those two cities. Backward trajectories were passing through Seoul area before arriving Chuncheon for about half of the samples, and $PM_{2.5}$ largely increased in Chuncheon when back-trajectories originated from Seoul area. Total carbon (TC) was calculated as sum of OC and EC, contributing 20.5% and 29.2% to total $PM_{2.5}$ mass in Chuncheon and Seoul, respectively. The average ratio of secondary organic carbon (SOC) to total OC was 40% at both sites, and the highest SOC concentration was observed in summer probably due to enhanced volatilization of organic species and active photochemical reaction. J value was calculated to determine if acidic condition affected the increase of secondary organic carbon. In both Chuncheon and Seoul SOC/OC ratios were fairly enhanced when J<100% of acidic condition.

Keywords

References

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