Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Day and Night Distribution of Gas and Particle Phases Polycyclic Aromatic Hydrocarbons (PAHs) Concentrations in the Atmosphere of Seoul

서울 대기 중 기체 및 입자상 다환방향족탄화수소 (PAHs)의 낮·밤 분포 특성

  • Lim, Hyung Bae (Air Quality Research Division, National Institute of Environmental Research) ;
  • Kim, Yong Pyo (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Lee, Ji Yi (Department of Environmental Engineering, Chosun University)
  • 임형배 (국립환경과학원 대기환경연구과) ;
  • 김용표 (이화여자대학교 환경공학과) ;
  • 이지이 (조선대학교 환경공학과)
  • Received : 2016.08.04
  • Accepted : 2016.08.22
  • Published : 2016.08.31
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Abstract

Day and night sampling for gas and particle phases PAHs were carried out in Seoul to characterize gas and particle phases PAHs concentrations in day and night times. There was no significant difference between day and night time for particle phase PAHs concentrations and phase distribution of PAHs, while, gas phase PAHs concentrations in daytime were about 1/2 of nighttime concentrations in both summer and winter due to photochemical reaction of gas phase PAHs during daytime. A high fraction of cancer risk for PAHs was attributed to particle phase PAHs and the excess cancer risk in winter was higher than in summer. The excess cancer risk level of total(gas+particle) PAHs in summer was partially observed when both gas and particle phase PAHs concentrations were considered as risk assessment. Based on the diagnostic ratios and factor analysis of PAHs concentrations, combustion(coal and natural gas) and vehicular emission might be the most significant contributors of PAHs and major factors for determining of PAHs concentration were different between day and night times.

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