Effect of γ-ray Irradiation on DtBuCH18C6-impregnated Adsorbent for Separation of Strontium from High-Level Liquid Waste

抄録

In this study, an adsorbent was synthesized using 4’,4’(5’’)-di(tert-butylcyclohexano)-18-crown-6 (DtBuCH18C6), dodecanol and SiO₂-P. The (DtBuCH18C6+dodecanol)/SiO₂-P adsorbent is known to have high adsorption properties for strontium, and experiments were conducted on the adsorption properties under gamma irradiation.

Experimental results showed that the adsorbent adsorbed strontium even under gamma irradiation. Regarding the stability of adsorbents under irradiation, it was found that the carbon retention of the adsorbent decreased linearly with increasing absorbed dose, assuming that all eluted carbon was derived from the impregnated extractants and modifiers. The results obtained for the adsorption performance of the irradiated adsorbent showed that the adsorption performance of the target adsorbent tended to decrease with increasing absorbed dose. The metal and carbon retentions of the adsorbents decreased linearly with increasing absorbed dose, but the decrease in carbon retention relative to the adsorbent dose was suppressed for the adsorbed metal.