Characteristics of PM Chemical Component during Haze Episode and Asian Dust at Gwang-ju
광주지역 고농도 및 황사 시의 미세먼지 화학적 성분 특성

Yeong-Jae Lee, Sun-A Jung, Mi-Ra Jo, Sun-Jung Kim, Mi-Kyung Park, Joon-Young Ahn, Young-Sook Lyu, Won-Jun Choi, You-Deog Hong, Jin-Seok Han, Jae-Hyun Lim
2014 Journal of Korean Society for Atmospheric Environment  
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 2and NH 4 + + consists of 50 percent in ionic species during haze episode that was higher than
more » ... as 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.
doi:10.5572/kosae.2014.30.5.434 fatcat:hmpeatwqw5b5pg4z4bmfyqgqdi