[1B07-10] Geopolymer 1

[1B09] Retention Mechanism of Cesium in Chabazite Embedded into Metakaolin-Based Alkali Activated Materials

*Chaerun Raudhatul Islam¹, Natatsawas Soonthornwiphat¹, Kanako Toda¹, Kazuma Kuroda¹, Ryosuke Kikuchi¹, Tsubasa Otake¹, John Provis², Yogarajah Elakneswaran¹, Tsutomu Sato¹ (1. Hokkaido Univ., 2. The University of Sheffield)

Keywords:Geopolymer, Transmission electron microscopy, Raman spectroscopy, Thermodynamics calculation, Pollucite, Fukushima Daiichi Nuclear Power Station

K-based geopolymer has recently attracted attention as a matrix material for spent synthetic chabazite encapsulation at the Fukushima Daiichi Nuclear Power Station. The aggregation of cesium with iron heterogeneously formed pollucite-like structures in chabazite, which was revealed by transmission electron microscopy images. Furthermore, Raman spectroscopy and thermodynamic calculation have proven the formation of pollucite structure.