Interaction of europium with calcium silicate hydrate under conditions saturated with groundwater

研究成果: ジャーナルへの寄稿学術論文査読

1 被引用数 (Scopus)

抄録

The barrier effect of calcium silicate hydrate (C–S–H), which is secondarily formed around a repository owing to the utilization of cementitious materials, was explored. Eu was employed as a chemical analog of Am (a key radionuclide in high-level radioactive wastes), and its interaction with C–S–H was analyzed via synthesis experiments. For the experiments, calcium oxide, fumed silica, and a Eu solution were mixed to interact Eu with C–S–H that had not undergone drying. Fluorescence Raman spectroscopies were performed to analyze the coexistence of Eu with C–S–H. The results indicated that Eu was mostly undissolved in the liquid phase and that it was incorporated into the C–S–H structure rather than precipitated as its hydroxide species even at the pH conditions for Eu hydrolysis. Additionally, the C–S–H formation at 50°C, as well as its incorporation of Eu, were accelerated compared to 25°C. The findings indicated the possibility of immobilizing Eu and Am by C–S–H formed in the underground environment even under groundwater conditions in which Eu and Am form mobile colloids via the hydrolysis.

本文言語英語
ジャーナルJournal of Nuclear Science and Technology
DOI
出版ステータス受理済み/印刷中 - 2024

フィンガープリント

「Interaction of europium with calcium silicate hydrate under conditions saturated with groundwater」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル