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자료유형
학술저널
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한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제46권 제6호
발행연도
2014.1
수록면
847 - 856 (10page)

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Spent resin waste containing a high concentration of 14C radionuclide cannot be disposed of directly. A fundamentalstudy on selective 14C stripping, especially from the IRN-150 mixed bed resin, was carried out. In single ion-exchangeequilibrium isotherm experiments, the ion adsorption capacity of the fresh resin for non-radioactive HCO3- ion, as thechemical form of 14C, was evaluated as 11mg-C/g-resin. Adsorption affinity of anions to the resin was derived in order ofNO3- > HCO3- ≥ H2PO4-. Thus the competitive adsorption affinity of NO3- ion in binary systems appeared far higher thanthat of HCO3- or H2PO4-, and the selective desorption of HCO3- from the resin was very effective. On one hand, the affinityof Co2+ and Cs+ for the resin remained relatively higher than that of other cations in the same stripping solution. Desorptionof Cs+ was minimized when the summation of the metal ions in the spent resin and the other cations in solution was nearsaturation and the pH value was maintained above 4.5. Among the various solutions tested, from the view-point of thesimple second waste process, NH4H2PO4 solution was preferable for the stripping of 14C from the spent resin.

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