SS4.06 Speciation, Bioavailability, and Impacts of Atmospheric Trace Metals in Aquatic Systems
Date: Wednesday, June 12, 2002
Location: Poster Session - VCC
 
KangJ, Seoul National University, Seoul, Republic Of Korea, jwkhang5@snu.ac.kr
Lee, C, , Seoul National University, Seoul, Republic Of Korea, cblee@plaza.snu.ac.kr
 
CHARACTERISTICS OF TRACE METAL COMPOSITION IN ATMOSPHERIC PARTICLES FROM THE EAST COAST OF KOREA
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Atmospheric particle samples, collected from a site on the east coast of Korea, have been analyzed for 9 trace metals including Fe,Mn,Sc,V,Cs,Co,Ni,Cu and Pb. The metals can be grouped into two genetic groups based on their enrichment factors(EFs) relative to Fe, one originating from natural sources(Fe,Mn,Sc,V,Cs,Co), the other from anthropogenic sources(Ni,Cu,Pb). The yellow-sand storms from the Chinese continent greatly affected the chemical composition of atmospheric particles, increasing the contents of the crust-originated elements while decreasing the EFs of the anthropogenic elements through dilution. Based on a linear mixing model of two end-members representing hypothetical crustal and anthropogenic sources, we estimated the anthropogenic fraction of Cu and Pb in atmospheric particles: Cu varied between 6-20 ng/m3, Pb between 8-25 ng/m3. Air trajectory analysis revealed Pb could serve as a useful tool in distinguishing the origins of the atmospheric particles, as the dust from Japan showed a lower Pb content. Ni, though it belongs to the anthropogenic group, behaves differently from Cu and Pb in that it has a good correlation with Fe content.