Journal of Nuclear Fuel Cycle and Waste Technology

Fenton‘s Reagent is applied to directly dissolve the cation-exchange resin, IRN-77. The characteristics of the experimental procedure is to dry the resin first and FeSO4 solution is completely absorbed into the resin, and then H2O2 is introduced later for an effective reaction between the reagents within the resin. As a characteristic of the dissolution, the lag time is needed for about 1 hour until the main reaction is occurred, which was more affected with the less concentration of FeSO4 and the less initial dose of H2O2. The dose of H2O2 was equally divided into the early stage and after the initial reaction to provide an effective and safe reaction condition. The optimum conditions is appeared that the concentration of FeSO4 is 0.0009 M and the dose of 15 % H2O2 solution is 6-7 volume for the dissolution of unit weight of IRN-77. The effect of the heating on the lag time was checked and the time could be reduced within 5 minutes at 50 oC, which is a relatively low temperature. The large amount of 5 g and 10 g of the resin was also completely decomposed by increasing the dose of H2O2 to 9-10 volume ratio.

Keywords

Ion-exchange resin,IRN-77,Dissolution,Fenton's reagent,FeSO4,H2O2