황사 에피소드 발샘시 대기먼지의 농도 특성과 인체 영향

Concentration Characteristics and Health Effect Assessment of Atmospheric Particulate Matters During Asian Dust Storm Episode

Thε Asian dust storms which originated in the deserts of Mongolia and China transported picles to Korea and led to a high concentration of atmospheric particulate mattεrs (PM) of more than 1000 μg/m3 throughout the country in the spring, of 2007. Public concem, in Korea, about the possible adverse effects of these dust events has increased, as these dust storms can contain various pollutants emitted from heavily industrialized eastem China. The objectives of this study werε， to understand thε concentration characteristics of PM as a function of particle size between the Asian dust storm episodes and non-Asian dust period and to consider the mass size distribution of PM in the Asian dust storms and their water soluble ion species on the potential, possible effects on deposition levels in the three regions (nasopharyngeal, tracheobronchial, and alveolar) of the human respiratory system. The size distribution of PM mass concentration during the Asian dust storms showed a pe in the coarse partice region due to the long-range transport of soil parces from the deserts of Mongolia and China, which was identified by HYSPLIT-4 model for backward σa jectory analysis of air arriving in the sampling site of Iksan. During the non-Aan dust period, there were two different types in PM size distribution: bimodal distribution when low concentrations of PM2.5 were observed, while unimodal distribution having a peak in fine paπic\e region when high concentrations of PM2.5 were showed. This unimodal distribution with high concentrations of finε particulate and second따y air po\lutants such as SO/, N03 , NH/ was found to be due to the long-range transport of air pollutants from industrialized eastem China. During the Asian dust storms, the mean concentrations of PM that can be deposited in the nasopharyngeal, tracheobronchial, and alveolar region were 128.8 μg/m3 ， 216.5 μg/m3 ， and 89.6 μg/m3 ， respectively. During the non-Asian dust period, the mean concentrations of PM that can be deposited in the nasopharyngεal， tracheobrond，and alveolar region were 8.4 μg/m3，9.5 μg/m3， and 38.5 μg/m3， respectively.