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Llorens, A. I., Deniard, P., Gautron, E., Olicard, A., Fattahi, M., Jobic, S. & Grambow, B. (2008) Structural investigation of coprecipitation of technetium-99 with iron phases. Radiochim. Acta, 96 569–574.
Added by: Laurent Cournède (2016-03-10 21:58:43) |
| Type de référence: Article DOI: 10.1524/ract.2008.1538 Numéro d'identification (ISBN etc.): 0033-8230 Clé BibTeX: Llorens2008 Voir tous les détails bibliographiques  |
Catégories: MIOPS Mots-clés: coprecipitation, ray-absorption spectroscopy, Technetium, tem, xrd Créateurs: Deniard, Fattahi, Gautron, Grambow, Jobic, Llorens, Olicard Collection: Radiochim. Acta |
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| Résumé |
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Technetium is a long-lived product of nuclear fission which commonly exhibits two oxidation states (IV and VII). Siderite (FeCO(3)), suspected to be formed as a container corrosion product in geological radioactive waste repositories, may concentrate by coprecipitation more than 90\% of technetium-99, present as Tc(IV) in surrounding aqueous fluids. X-ray diffraction and transmission electron microscopy measurements indicate that technetium can be incorporated within the siderite structure, even if we note that technetium-bearing green rust phase may also be observed. These results suggest that siderite might play a beneficial role in limiting Tc diffusion to the next environment of nuclear waste repositories.
Added by: Laurent Cournède |