Patent Number: 
Section: claims

1. A treatment method for a used ion exchange resin, comprising:bringing a used ion exchange resin into contact with a reaction solution, the used ion exchange resin having an ion exchange group with at least a radionuclide or a heavy metal element adsorbed thereon, and the reaction solution containing an iron compound, hydrogen peroxide, and ozone;separating at least a part of the reaction solution in contact with the used ion exchange resin from the used ion exchange resin; anddecomposing an organic component contained in the reaction solution separated from the used ion exchange resin. 2. The treatment method for the used ion exchange resin according to claim 1,wherein the reaction solution is added with an iron compound, hydrogen peroxide, and ozone during decomposing the organic component contained in the reaction solution. 3. The treatment method for the used ion exchange resin according to claim 1,wherein at least the part of the reaction solution in contact with the used ion exchange resin is separated from the used ion exchange resin after total organic carbon concentration in the reaction solution becomes 1.7 mol/L or more. 4. The treatment method for the used ion exchange resin according to claim 1,wherein at least the part of the reaction solution in contact with the used ion exchange resin is separated from the used ion exchange resin after concentration of the radionuclide or concentration of the heavy metal element in the reaction solution becomes a predetermined value or more. 5. The treatment method for the used ion exchange resin according to claim 1,wherein at least the part of the reaction solution in contact with the used ion exchange resin is separated from the used ion exchange resin after adding an aggregating agent that aggregates the used ion exchange resin to the reaction solution. 6. The treatment method for the used ion exchange resin according to claim 1, further comprising recovering the ozone during bringing the used ion exchange resin into contact with the reaction solution. 7. The treatment method for the used ion exchange resin according to claim 1,wherein:the used ion exchange resin is brought into contact with the reaction solution in a reaction tank, andthe organic component contained in the reaction solution is decomposed in a regeneration tank different from the reaction tank.