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Journal of the Korean Society for Environmental Analysis 2019;22(1):1-9.
울산시 미세먼지 입경별 이온 분포와 오염원 추정
박민규1, 최성득2, 권혜옥3, 송솔아3, 김성준3
1UNIST
2울산과학기술원
3울산과기원
Abstract
In this study, the size distributions of airborne particulate matter (PM) associated ionic species (Cl-, NO3-, SO42-, Na+, NH4+, K+, Mg2+, and Ca2+) and pollution sources were investigated. PM samples were collected using two micro-orifice uniform deposit impactors (MOUDIs) with 11stage cut-sizes (0.056, 0.10, 0.18, 0.32, 0.56, 1.0, 1.8, 3.2, 5.6, 10.0, and 18.0 µm) at residential and industrial sites in Ulsan, Korea. At both sites, anthropogenic ions (SO42-, NO3-, and NH4+) contributed to over 60% of the total ion concentrations in PM and were dominant in fine particles. During the high PM episodes, SO42- (42%) was the main ion at the industrial site due to the influence of petrochemical and non-ferrous industries, whereas the contribution of NH4+ (24%) was relatively high at the residential site. The levels of both ions (SO42- and NH4+) were directly influenced by major wind directions. Natural ions (Cl-, Na+, and Mg2+) derived from the earth’s crust and the ocean were prevalent in coarse particles. Based on this study, comprehensive monitoring of ions will be conducted in Ulsan.
Key Words: Particulate matter, Ion chromatography, MOUDI, Size distribution, Ulsan
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