황사기간동안 제주, 고산지역에서 호흡성 분진의 입자 분포 특성

Abstract

This study was intended as an investigation of characteristics of background site atmospheric respirable particulate matters(RPM), and fine particles(<2.5m). 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 1 to 30, April, 2001 using an eight-stage cascade impacter(particle size range : 0.43~11m), and cyclone separator(cut size : 2.5, 10m). 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 g/m3, respectively, which were significantly increased amounts compared to 13.3 and 13.0 g/m3 for Non-YS(NYS). Most size distributions had two peaks, one at 0.43~.65 m and the other at 3.3~4.7 m. 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.