Proceedings of the Korean Environmental Health Society Conference (한국환경보건학회:학술대회논문집)
- 2003.06a
- /
- Pages.76-85
- /
- 2003
The Importance of Dry Deposition : Dry Deposition Fluxes of Heavy Metals In Seoul, Korea During Yellow-Sand Events
-
Yi, Seung-Muk
(Seoul National University, College of Public Health, Department of Environmental Health)
- Published : 2003.06.01
Abstract
Mass and elemental dry deposition fluxes and ambient particle size distributions were measured using dry deposition plates and a cascade impactor, from March to November 1998 in Seoul, Korea. During the spring sampling period several yellow sand events characterized by long range transport from China and Mongolia impacted the area. During these events the mass fluxes were statistically the same as during springtime non-yellow-sand events. However, most elemental fluxes were higher. In general, the flux ratios of both crustal (Al, Ca, Mn) and anthropogenic elements (Ni, Pb) to total mass measured during the daytime yellow-sand events were substantially higher than those measured in spring daytime during non-yellow-sand time periods. During all seasons the average measured daytime fluxes were about two times higher than at nighttime. The flux of primarily anthropogenic metals (Cu, Ni, Pb, Zn) and Mn was on average one to two orders of magnitude lower than the flux of the crustal metals Al and Ca. As is typically found two modes, fine (0.1∼l.0
Keywords