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Morizet, Y., Hamon, J., La, C., Jolivet, V., Suzuki-Muresan, T. & Paris, M. (2021) Immobilization of 129I in nuclear waste glass matrixes synthesized under high-pressure conditions: an experimental study. J. Mater. Chem. A, 9 23902–23915.
Added by: Richard Baschera (2021-11-04 14:32:09) Last edited by: Richard Baschera (2021-11-04 14:38:58) |
| Type de référence: Article DOI: 10.1039/D1TA05011G Numéro d'identification (ISBN etc.): 2050-7496 Clé BibTeX: Morizet2021a Voir tous les détails bibliographiques  |
Catégories: IMN Créateurs: Hamon, Jolivet, La, Morizet, Paris, Suzuki-Muresan Collection: J. Mater. Chem. A |
Consultations : 1/366
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| Liens URLs https://pubs.rsc.o ... 2021/ta/d1ta05011g |
| Résumé |
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There is major environmental interest in finding a sustainable solution to immobilize 129I, a by-product of the nuclear industry. The use of aluminoborosilicate glasses represents a good compromise. However, this solution does not appear adequate for 129I owing to its volatility at high temperature during the vitrification process. In the present work, we use a high-pressure (1.5 GPa) apparatus to synthesize I-rich aluminoborosilicate glasses. We show that the use of high-pressure conditions enhances the I solubility in glasses by several orders of magnitude as compared to 1 bar synthesis, with I solubility up to 5.7 mol%. We observed that I is more solubilized in Na-rich as compared to Ca-rich glass. Investigation of the I speciation using XPS also reveals that I solubility in glasses is much higher as I dissolves as I5+ in comparison to I−. Our work shows that using high-pressure appears to be a reliable solution for dissolving a large quantity of I within the structure of aluminoborosilicate glasses for the conditioning of nuclear waste. We also demonstrate that the oxidized I waste form should be employed to greatly increase I solubility in nuclear waste glasses. Therefore, it represents a potential pathway for solving the immobilization of 129I produced by anthropic nuclear activity.
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Publisher: The Royal Society of Chemistry
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