Abstract
The radionuclides are extracted from the minerals which make up the rocks. This work takes natural magmatic granite as the matrix and CeO2 as the simulated radioactive waste to explore the maximum solid solubility. After analyzing the phase transition of pure granite with varied temperatures, the solidification was carried out at 1300 ℃. The phase, microstructure, element distribution, hardness and chemical stability of the solidified bodies were studied. The results showed that the maximum solid solubility was up to 8 wt.%. The normal leaching rate of Ce4+ after the first 3 d was about 3.89 × 10–7 g·m−2·d−1.
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Acknowledgements
The authors appreciate the financial supports from the National Natural Science Foundation of China (No. 21976146) and the Research Fund Program of Guangdong Key Laboratory of Radioactive and Rare Resource Utilization (No.2019-LRRRU02).
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Li, L., Shu, X., Tang, H. et al. Immobilize CeO2 as simulated nuclear waste in natural magmatic granite: maximum solid solubility. J Radioanal Nucl Chem 328, 795–803 (2021). https://doi.org/10.1007/s10967-021-07691-2
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DOI: https://doi.org/10.1007/s10967-021-07691-2