한국환경보건학회지 (Journal of Environmental Health Sciences)

  • 제44권1호
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  • Pages.1-14
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  • 2018
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  • 1738-4087(pISSN)
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  • 2233-8616(eISSN)
한국환경보건학회 (Korean Society of Environmental Health)
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광주지역 미세먼지의 화학적 조성이 시정에 미치는 영향에 관한 연구

The Effect on Visibility of the Chemical Composition of Fine Particles in the Gwangju Area

  • 정선아 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 임철수 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 조미라 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 이상보 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 김정수 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 신은상 (동남보건대학교 바이오환경보건과)
  • Jung, Sun-A (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research, University) ;
  • Lim, Cheol-Soo (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research, University) ;
  • Jo, Mi-Ra (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research, University) ;
  • Lee, Sang-Bo (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research, University) ;
  • Kim, Jung-Soo (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research, University) ;
  • Shin, Eun-Sang (Department of Bio & Environmental Health, Dongnam Health University)
  • 투고 : 2017.12.28
  • 심사 : 2018.02.01
  • 발행 : 2018.02.28
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초록

Objectives: The purpose of this study is to investigate the main cause of visibility impairment by analyzing the contributions of the light extinction coefficient of major air pollution components and the change of the light extinction coefficient by relative humidity. Methods: The characteristics of the light extinction coefficient calculated by the photochemical method using fine particle component data measured in 2015 in the Gwangju area were examined. Results: The extinction efficiency per unit mass of $PM_{2.5}$ particles was $4.5m^2/g$ and that of $PM_{10-2.5}$ particles was $0.6m^2/g$. This difference indicates that most of the visibility impairment in Gwangju was caused by $PM_{2.5}$ particles. When visibility was poor, the contribution of ammonium sulphate and ammonium nitrate was significantly increased. Relative humidity was also a major cause of visibility decay. The influx of air currents in Gwangju was mostly caused by the long distance movement of pollutants emitted from the eastern part of China. Ammonium sulphate and ammonium nitrate, which are hygroscopic secondary contaminants, were the main causative agents of visibility impairment. Conclusions: Ammonium sulphate and ammonium nitrate were the main causative agents of visibility impairment in Gwangju. The influx of air currents in Gwangju was mostly caused by the long distance movement of pollutants emitted from the eastern part of China.

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