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Chemical Speciation of Heavy Metals in Geologic Environments on the Abandoned Jangpoong Cu Mine Area  

Lee In-Gyeong (Dept. of Earth and Environmental Sciences, Institute for Basic Sciences, Chungbuk National Univ.)
Lee Pyeong-Koo (Div. of Geological & Environmental Harzards, Korea Institute of Geoscience and Mineral Resources)
Choi Sang-Hoon (Dept. of Earth and Environmental Sciences, Institute for Basic Sciences, Chungbuk National Univ.)
Kim Ji-Soo (Dept. of Earth and Environmental Sciences, Institute for Basic Sciences, Chungbuk National Univ.)
So Chil-Sup (Dept. of Earth and Environmental Sciences, Korea Univ.)
Publication Information
Economic and Environmental Geology / v.38, no.6, 2005 , pp. 699-705 More about this Journal
Abstract
In order to identify the speciation of As and trace elements which are contained weathered waste rocks on the abandoned Jangpoong Cu mine area, five fraction sequential extraction was carried out. Concentrations of the extraction solutions which were acquaired each fraction were mesured by ICP-AES. Mineral characters of weathered waste rocks were determinated by XRD. The weathered waste rocks could divide into two types (Type I and type II). Type land type II weathered waste rocks are mainly composed of a quartz and a calcite, respectively. The most dominant speciation of As, Co and Fe is residual phase. Most of the speciation of Cd, Mn and Zn is residual phase for type I and Fe-Mn oxide phase for type II. In case of Cu, residual phase is predominant in type I and sulfide is predominet in type II. The most dominant speciation of Pb for type I and type II is associated with the residual phase and Fe-Mn oxide phase, respectively. At pH 4-7 range, the order of relative mobility considers Zn>Cu>Cd>Pb>Co>AS in type I, and Cd>Cu>Zn>Pb>As>Co in type II.
Keywords
weathered waste rocks; Jangpoong Cu mine; sequential extraction; As and trace elements; speciation; mobility;
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