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Fraction and Mobility of Heavy Metals in the Abandoned Closed Mine Near Okdong Stream Sediments  

Kim Hee-Joung (Department of Environmental Science, Kangwon National University)
Yang Jae-E (Division of Environmental & Biological Engineering, Kangwon National University)
Lee Jai-Young (Department of Environmental Eng., University of Seoul)
Jun Sang-Ho (Department of Environmental Science, Kangwon National University)
Publication Information
Journal of Soil and Groundwater Environment / v.10, no.2, 2005 , pp. 44-51 More about this Journal
Abstract
Fractional composition and mobility of some heavy metals in sediments from Okdong stream are investigated. The fractional scheme for heavy metals in the sediment was established for five chemically defined heavy metal forms as adsorbed fraction, carbonate fraction, reducible fraction, organic fraction, and residual fraction. The most abundant fraction heavy metals in the sediments is reducible and secondly abundant is organic fraction. Adsorbed fraction is minor part of the total heavy metals. Mobilization of heavy metals in the sediments from Okdong stream occur $19.8{\sim}56.7%$ of total cadmium concentrate. The most abundant fraction of the sediment metal is organic fraction in Cu, Pb metals investigated. Labile fraction of sediment metals are $0.5{\sim}48.5%$ of total Zn, $2.6{\sim}48.1%$ of total Pb, and $0.2{\sim}36.9%$ of total Cu, respectively. Most of labile fraction consists of reducible fraction for Cd, Zn, adsorbed fraction for Pb, reducible fraction for Cu, adsorbed fraction for Ni. The Mobilization of Zn and Cu is most likely to occur when oxygen depletes and that of Pb and Ni occurs when physical impact, oxygen depletion and pH reduction.
Keywords
Sediment; Heavy metals; Mobility; Labile fraction;
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