Development of Selective Separation Method of Nuclear Rare Metals by Highly Functional Xerogels

• 作 者: HitoshiMimura;TakuyaKawamura;RanaSyedMasud;YuichiNiibori;TakashiOhnishi;HiroshiOhbayashi;Shin-ichiKoyama;HiroshiSugai;
• 机 构: Tohoku University Japan
• 出 处: BIT`s 2nd Low Carbon Earth Summit-2012 2012第二届低碳科技大会
• 发表日期: 2012年期

　　Special attention has been given to the selective separation and recovery of heat-generating nuclide (Cs), platinum group metals (PGMs: Pd, Ru and Rh) and oxoanions (Mo, Re and Tc, etc) from high-level liquid wastes (HLLWs) in relation to the partitioning of radioactive nuclides and their effective utilization.As for the recovery of these nuclides from HLLWs, selective inorganic ion-exchangers and extractants have been developed, and their granulation with alginate biopolymers is effective for the compact and successive separation process using the packed column.We have attempted to immobilize these materials into the porous alginate gel polymers;the microcapsules (MCs) can be readily prepared by using sol-gel method.The present study deals with the uptake behavior of the above nuclides on MCs and the chromatographic separation for simulated HLLW (28 components, SW-11E, JAEA) by batch and column methods.