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http://dx.doi.org/10.5572/KOSAE.2014.30.5.434

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

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)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.30, no.5, 2014 , pp. 434-448 More about this Journal
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.
Keywords
Haze episode; Asian dust; Chemical composition; Gwang-ju;
Citations & Related Records
Times Cited By KSCI : 11  (Citation Analysis)
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