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Electrokinetic Remediation of Soil Contaminated with Zn, Ni and F  

Cho, Jung-Min (Department of Environmental Engineering, Kumoh National institute of Technology)
Ryu, Byung-Gon (Department of Environmental Engineering, Kumoh National institute of Technology)
Park, Sung-Woo (Department of Environmental Engineering, Kumoh National institute of Technology)
Kim, Kyeong-Jo (Department of Environmental Engineering, Kumoh National institute of Technology)
Baek, Ki-Tae (Department of Environmental Engineering, Kumoh National institute of Technology)
Publication Information
Journal of Soil and Groundwater Environment / v.14, no.1, 2009 , pp. 36-43 More about this Journal
Abstract
The feasibility of electrokinetic remediation was investigated in the laboratory to treat contaminated soil with Zn, Ni and F. Electro-migration and electro-osmosis are the major removal mechanisms because fluorines desorbed from soil exist as an anionic form in soil pores, and Zn and Ni exist as a cationic form. Desorption of fluorine was enhanced under the alkaline condition, but that of Zn and Ni increased under the acidic condition. Sequential pH control was effective to control the mixed wastes from contaminated soil. 2 V/cm was applied to reactor to evaluate the effect of constant voltage gradient, after two weeks, the removal efficiency of Zn, Ni and F was 20.5%, 2.5% and 57.4%, respectively. Even though the removal of Zn and Ni was very low, the pH control enhanced transport of Zn and Ni significantly. As a result, sequential pH control is a effective method to remediate mixed waste-contaminated soil.
Keywords
Zn; Ni; Electrokinetic remediation; Zinc; Nickel; Fluorine; pH control; Multiple contaminants;
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