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Characteristics of Heavy Metal Releases from the Abandoned Dogog Mine Tailing in Korea
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 Title & Authors
Characteristics of Heavy Metal Releases from the Abandoned Dogog Mine Tailing in Korea
Park, Chang-Jin; Kim, Won-Il; Jeong, Goo-Bok; Lee, Jong-Sik; Ryu, Jong-Su; Yang, Jae-E.;
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Objective of this research was to assess the release characteristics of metals from the mine tailing to base the prediction of metal load potential from tailing to soils. Water-soluble concentrations of Cd, Cu, Pb and Zn released from mine tailing after 2 hrs were 2.31, 129.38, 17.17, and 287.53 mg/kg, respectively, as compared to 1.6, 128, 108, and 142 mg/kg that were extractable by 0.1 M HCl. Kinetics of metal releases followed the power function model significantly indicating that more of water soluble fractions of those metals released at the initial short time, followed by a slow increase. Concentrations of metals released from tailing by water and 0.1 M HCl were in the orders of Zn > Cu > Pb > Cd. The breakthrough curve from the column experiment showed that concentrations of Cd, Cu, and Zn reached at highest after one pore volume, but that of Pb reached highest after five pore volumes when 0.1 M HCl was used as eluent. The release rate of Cd from mine tailing was the fastest but Pb was the slowest. The cumulative mass of metal released by 0.1 M HCl was in the order of Zn > Cu > Pb > Cd after nine pore volume elution.
mine tailing;heavy metal;release characteristics;water soluble;0.1 M HCl extractable;
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