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http://dx.doi.org/10.7733/jnfcwt.2014.12.1.1

Improved Treatment Technique for the Reuse of Waste Solution Generated from a Electrokinetic Decontamination System  

Kim, Wan-Suk (Korea Atomic Energy Research Institute)
Kim, Seung-Soo (Korea Atomic Energy Research Institute)
Kim, Gye-Nam (Korea Atomic Energy Research Institute)
Park, Uk-Ryang (Korea Atomic Energy Research Institute)
Moon, Jei-Kwon (Korea Atomic Energy Research Institute)
Publication Information
Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) / v.12, no.1, 2014 , pp. 1-6 More about this Journal
Abstract
A large amount of acidic waste solution is generated from the practical electrokinetic decontamination equipments for the remediation of soil contaminated with uranium. After filtration of uranium hydroxides formed by adding CaO into the waste solution, the filtrate was recycled in order to reduce the volume of waste solution. However, when the filtrate was used in an electrokinetic equipment, the low permeability of the filtrate from anode cell to cathode cell due to a high concentration of calcium made several problems such as the weakening of a fabric tamis, the corrosion of electric wire and the adhension of metallic oxides to the surface of cathode electrode. To solve these problems, sulfuric acid was added into the filtrate and calcium in the solution was removed as $CaSO_4$ precipitate. A decontamination test using a small electrokinetic equipment for 20 days indicated that Ca-removed waste solution decreased uranium concentration of the waste soil to 0.35 Bq/g, which is a similar to a decontamination result obtained by distilled water.
Keywords
Electrokinetic Remediation; Waste solution; Decontamination; Uranium; Reuse; $CaSO_4$;
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Times Cited By KSCI : 2  (Citation Analysis)
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