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Environmental Engineering Research 1997;2(1): 61-72.
Immobilization of Ion-Exchange Resins with a Mixture of Cement and WEP/Zeolon 900-Na Additives and Radionuclides Leaching
Kwang-Soo Bae, and Jae-Owan Lee
Department of Environmental Engineering, Andong Technical College. Korea Atomic Energy Research Institute
Corresponding Author: Kwang-Soo Bae ,
Received: April 6, 1996;  Accepted: October 8, 1996.
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ABSTRACT
Leaching characteristics of radionuclides (Co-60, Sr-85, Cs-137) and additive effects in the solidification of ion-exchange resin incorporating radionuclides were investigated. The results from the addition of Water-Extendible Polyester (WEP) showed the increased loading of ion-exchange resin in the final cemented product and the improvement of the compressive strength of the solid waste form. The addition of Zeolon-900 Na greatly reduced the leaching rate of Cs-137. From the leaching test according to ANS 16.1, the comparison of the leaching rate of the three radionuclides gave the following order : Sr-85 ) Cs-137 ) Co-60. The leaching rate of Co-60 and Sr-85 was affected by the decrease of leaching flow rate but the leaching rate of Cs-137 was not. The clinoptilolite used as backfill material showed the strong sorptive effect on the Sr-85 and Cs-137, and thus greatly retarded the leaching rate while the leaching rate of Co-60 was not retarded
Keywords: Immobilization | Leaching characteristics | Additives | Ion-exchange resin | Backfill material
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