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Characteristics of Ambient Metals: Size Segregated Ambient Concentrations and Dry Deposition Fluxes at Four Sites in Kunpo in 2000
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  • Characteristics of Ambient Metals: Size Segregated Ambient Concentrations and Dry Deposition Fluxes at Four Sites in Kunpo in 2000
저자명
Kim. Yong-Pyo,Yun. Hui-Jung,Yi. Seung-Muk
간행물명
Journal of Korean society for atmospheric environment
권/호정보
2002년|18권 |pp.57-68 (12 pages)
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한국대기환경학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Atmospheric dry deposition fluxes and size segregated concentrations of particulate metal elements were measured at four sites in Kunpo, a small city in the Seoul metropolitan area in Korea. At each site, aerosol samples were collected by dry deposition plates, a cascade impactor, and a coarse panicle rotary impactor during four sampling periods. At all sites, the average fluxes of metals measured during daytime were higher than nighttime fluxes due to higher wind speeds and higher ambient concentrations during daytime. The average fluxes of crustal elements (Al, Ca) were 1∼2 orders of magnitude higher than anthropogenic elements (As, Cd, Cu, Mn, Ni, Pb, and Zn). The daytime fluxes of Al and Ca were between 90 and 12000 $mu extrm{g}$ m$^$-2/ day$^$-1/, and the nighttime fluxes of Al and Ca were between 20 and 2200 $mu extrm{g}$ m$^$-2/ day$^$-1/. The daytime fluxes of Pb, a typical anthropogenic element, were between 20 and 160$mu extrm{g}$ m$^$-2/ day$^$-1/, and the nighttime fluxes of Pb were between ND and 100$mu extrm{g}$ m$^$-2/ day$^$-1/. Also the ambient metal concentrations during daytime were higher than nighttime. Based on a dust emission estimation study in Kunpo, it was found that dust emissions during daytime are higher than nighttime. The concentrations of crustal elements were higher than anthropogenic elements. The distributions of heavy metals were mainly in small particles (D$\_$p/ 9㎛). The fraction of crustal elements in the large particles (D$\_$p/> 9㎛) were higher than anthropogenic elements.