[3J11-15] 核種移行・収着

[3J12] Determination of the sorption mechanism of Cs⁺ and Eu³⁺ to sodium activated metakaolin-based geopolymers

*ANIL CAN YILDIRIM¹, TAKUMI SAITO¹, NOBORU AOYAGI² (1. UTokyo, 2. JAEA)

キーワード：Geopolymer, Sorption, Cesium, Europium, TRLFS

Geopolymer is a group of newly derived barrier materials for the stabilization of radioactive wastes. In this study, sodium activated and metakaolin-based geopolymer (Na-MKGP) was investigated to understand its sorption mechanisms for cesium (Cs⁺) and europium (Eu³⁺). The sorption of these ions was studied as a function of pH and different background salt concentrations. Furthermore, the sorption of Eu³⁺ was studied by time-resolved laser fluorescence spectroscopy (TRLFS) to reveal the speciation of Eu³⁺ with Na-MKGP.