[2C01-06] Migration/Sorption

[2C03] Sorption Behavior of Cesium on Calcium Silicate Hydrate under High Sulfate Ion Concentration Conditions

*NAOYUKI TAMURA¹, Taiji CHIDA¹, Yuichi NIIBORI¹, Seong-Yun KIM¹ (1. Affiliation Dept. of Quantum Science & Energy Engineering Graduate School of Engineering, Tohoku University)

Keywords:CSH gel, Sulfate ions, Cesium, Sorption

To assess radionuclide migration, sorption behavior on calcium silicate hydrate (CSH) gel formed as a secondary mineral is a key factor because CSH gels effectively adsorb radionuclides, in particular cationic nuclides. However, sorption characteristics of CSH gel depend on Ca/Si ratio of the CSH gel and it is changed by the leaching of Ca ions and the formation conditions. In this study, the influence of sulfate ions on the sorption of Cs ions on the CSH gel was preliminarily examined.