Confining caesium in expanded natural Perlite.
Fiche publication
Date publication
janvier 2007
Auteurs
Membres identifiés du Cancéropôle Est :
Dr BOOS Anne
Tous les auteurs :
Rehspringer JL, Balencie J, Vilminot S, Burger D, Boos A, Estournes C
Lien Pubmed
Résumé
We present the potential use of expanded perlite, a metastable amorphous hydrated aluminum silicate, as a permanent medium for the long-term confinement of caesium. A simple loading by mixing an aqueous caesium nitrate solution and expanded perlite at 300 K followed by thermal annealing leads to 96% sintering. The formation of pollucite, CsAlSi2O6, a naturally occurring mineral phase, appears as the crystalline phase embedded in a glassy phase. Leaching tests on the resulting glass-ceramics reveal a very low Cs departure of 0.5 Mg m(-2) day(-1). This simple method seems to be a good way to permanently confine caesium issued from recycled nuclear waste. (c) 2006 Elsevier Ltd. All rights reserved.
Référence
. 2007;27(2-3):619-22.