Cesium sorption onto alkaline activated materials

萩原 大樹  ; 高久 敦*; 佐川 浩*; 菅野 太志*; 伊藤 あずさ  ; 安藤 太一*; 市原 正嗣*; 渡辺 勇輔  ; 小荒井 一真   ; 加藤 潤 ; 藤原 健壮 ; 石寺 孝充 ; 種市 やよい; 有阪 真 ; 飯島 和毅  

Hagiwara, Hiroki; Takaku, Atsushi*; Sagawa, Hiroshi*; Kanno, Futoshi*; Ito, Azusa; Ando, Taichi*; Ichihara, Masatsugu*; Watanabe, Yusuke; Koarai, Kazuma; Kato, Jun; Fujiwara, Kenso; Ishidera, Takamitsu; Taneichi, Yayoi; Arisaka, Makoto; Iijima, Kazuki

Alkaline activated materials (AAMs) are being considered for the immobilization of radioactive materials. The aim of this study was to investigate the possible cesium sorption mechanisms of a metakaolin-based AAM that had been stored at room temperature for an extended period. To evaluate the effectiveness of a radiocesium sorption strategy, cesium sorption experiments were conducted. Subsequently, the solid samples were analyzed using various characterization techniques. The results indicate that cesium was incorporated into micrometer-size fine particles within the AAM. Cs-Na ion exchange occurs within the zeolite framework, involving the Al-O-Si and Si-O-Si bands. Overall, cesium can be effectively sorbed into the AAM that has been stored for several days.