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KMID : 0382420030290030091
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Korean Journal of Environmental Health Society
2003 Volume.29 No. 3 p.91 ~ p.96
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Characteristics According to the Size Distributions of Respirable Particulate During Yellow Sand Episode in Kosan, Jeju Island
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Kim Jeong-Ho
Lee Jeong-Joo
Ahn Jun-Young
Han Jin-Seok
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Abstract
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This study was intended as an investigation of characteristics of background site atmospheric respirable particulate matters(RPM), and tine particles＜2.5㎛). The particle size distributions during the phenomenon of Yellow Sand(YS) occurs from April, 2001. Atmospheric aerosol particulate matter was directly collected on the Jeju island between I to 30, April, 2001 using an eight-stage cascade impacter(particle size range: 0.43-11㎛). and cyclone separator(cut size: 2.5, 10㎛). The episode of YS observed in background monitoring site, Kosan and appeared 2 times at sampling period. The mass concentrations of fine and coarse particles for YS episode were 34.2 and 59.6 ㎍/㎥, respectively, which were significantly increased amounts compared to 13.3 and 13.0 ㎍/㎥ for Non-YS(NYS). Most size distributions had two peaks, one at 0.43-.65 ㎛ and the other at 3.3-4.7㎛. The result of analysis of water-soluble ion component indicated that sulfate was mainly ion component. but nitrate and calcium ion was significantly increased at the YS episode.
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