[3G09-13] 廃棄物

[3G12] The Effect of Structural Interaction of Radionuclides and Sodium Alkalinized Metakaolin-Based Geopolymer on Leakage from Host Matrix

*ANIL CAN YILDIRIM¹, KANAKO TODA¹, TAKUMI SAITO¹ (1. University of Tokyo)

キーワード：Geopolymer, Leaching, Seawater, Cesium, Europium

Geopolymer (GP) is a group of newly derived inorganic barrier materials for the stabilization of radioactive wastes that possess superior characteristics than cement in terms of engineering applications including radionuclide immobilization. In this study, the leaching behavior of radionuclides (RN) which were Cesium (Cs⁺), Strontium (Sr²⁺), Europium (Eu³⁺), Uranyl (UO₂²⁺) and Iodine (I^-) from the sodium alkalinized metakaolin based geopolymer (Na-MKGP) have been studied under different aqua conditions such as distilled water (DW), groundwater (GW) and seawater (SW) as a function of time. The results were discussed through the structural participation of RN’s in the Na-MKGP matrix that has been integrated through the characterization of the specimens, complexation process, and ion exchange reaction.