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Characteristics of PM Chemical Component during Haze Episode and Asian Dust at Gwang-ju

광주지역 고농도 및 황사 시의 미세먼지 화학적 성분 특성

  • Lee, Yeong-Jae (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research) ;
  • Jung, Sun-A (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research) ;
  • Jo, Mi-Ra (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research) ;
  • Kim, Sun-Jung (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research) ;
  • Park, Mi-Kyung (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research) ;
  • Ahn, Joon-Young (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research) ;
  • Lyu, Young-Sook (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research) ;
  • Choi, Won-Jun (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research) ;
  • Hong, You-Deog (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research) ;
  • Han, Jin-Seok (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research) ;
  • Lim, Jae-Hyun (Department of air Quality Research, Climate and Air Quality Research Division, National Institute of Environmental Research)
  • 이영재 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 정선아 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 조미라 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 김선정 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 박미경 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 안준영 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 유영숙 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 최원준 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 홍유덕 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 한진석 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 임재현 (국립환경과학원 기후대기연구부 대기환경연구과)
  • Received : 2014.08.12
  • Accepted : 2014.09.25
  • Published : 2014.10.31

Abstract

The aerosol characteristics between haze episode and Asian dust event were identified in January and March, 2013 in Gwang-ju of Korea to investigate the metal elements, ionic concentrations and carbonaceous particles of $PM_{2.5}$ and $PM_{10}$. In the haze episode, the concentrations were increased 1~3.2 times of ionic species and 1.6~2.7 of metal elements. Especially, the concentration of $NO{_3}{^-}$, $SO{_4}{^2-}$ and $NH{_4}{^+}$ consists of 50 percent in ionic species during haze episode that was higher than Asian dust event. This suggests that secondary aerosols from anthropogenic air pollution were mainly contributed by haze episode. During the Asian dust event, increase of metal concentrations was higher than haze episode because of remarkable increase of Ti, K and Fe originated from soil. The concentrations of carbonaceous particles were increased 2.5 times during haze episode, and 2.4 times of OC and 2.1 times of EC during Asian dust event in $PM_{2.5}$. However, these aerosol mass concentration does not affect the OC/EC ratio. The average equivalence ratios of cations/anions in $PM_{2.5}$ were 0.99 in haze episodes and 0.94 during non-event day. The neutralization factor of $NH_3$ was higher than that of $CaCO_3$. Futhermore, $NH{_4}{^+}$ aerosol was aged due to atmospheric stagnation that might be affected by the haze episode.

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