Journal of Nuclear Fuel Cycle and Waste Technology

Fenton‘s reagent is applied to directly decompose the ion-exchange resins, IRN-78 and the mixed resin with IRN-77. The newly applied procedures is to dry the resin first and the catalyst solution is completely absorbed into the resin, then a limited dose of H2O2 is introduced for an effective reaction between the reagents within the resin. As a characteristic on the decomposition of IRN-78, the resin mixture should be heated to 40oC to induce the initial reaction and lag time is also needed for about 20 minutes until the main reaction occurs. The effectiveness of the decomposition is investigated using CuSO4, Cu(NO3)2 and FeSO4 as a catalyst and the decomposition rate is compared depending on the concentration of each catalyst and the amount of H2O2. The most effective catalyst was found to be FeSO4 for IRN-78 alone and the mixed resin with IRN-77, and FeSO4 showed a special effect that the reaction was initiated without heating and a lag time. Furthermore, the optimum concentration of the catalyst for each resin and the mixed one is suggested in the view point of the amount of H2O2. needed and the stability of the decomposition reaction.

Keywords

Resins,IRN-77,IRN-78,Fenton';s reagent,Decomposition,FeSO4,CuSO4