In this work, the chemical digestion conditions for spent KU-2 × 8 sulfocationites manufactured in Russia were investigated. It was shown that the complete oxidative digestion of the ionites could be performed in solutions of H2O2 and HNO3 in the presence of Fe3+ ions adsorbed on the resin as an oxidation catalyst. The total digestion time of the resin was studied as a function of the presence of the digestion catalysts, solid-to-liquid phase ratio, process temperature, Fe3+ ion content in the solid sulfocationite phase, and the divinylbenzene (DVB) cross-linking agent content of the ionite. A possibility for the removal of rare earth element (REE) and transplutonium element (TPE) radionuclides from the solution of the digested sulfocationite was shown by the sorption technique using the tetra-n-octyldiglycolamide (TODGA)-based sorbent.

中文翻译：

---

含有放射性稀土和转钚元素的废磺基磺酸盐的氧化消化

在这项工作中，研究了俄罗斯生产的废弃 KU-2 × 8 磺基磺酸盐的化学消化条件。结果表明，在吸附在树脂上的 Fe3+ 离子作为氧化催化剂存在的情况下，可以在 H2O2 和 HNO3 溶液中对离子进行完全氧化消化。研究树脂的总消化时间与消化催化剂的存在、固液相比、工艺温度、固体磺基磺酸盐相中的 Fe3+ 离子含量和二乙烯基苯 (DVB) 交联剂的关系离子的含量。使用基于四正辛基二甘醇酰胺 (TODGA) 的吸附剂的吸附技术显示了从消化的磺基磺酸盐溶液中去除稀土元素 (REE) 和反钚元素 (TPE) 放射性核素的可能性。