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Sorption Processes of UO22+ Ions onto Zirconium and Thorium Phosphate Surfaces: Thermodynamical and Structural Aspects

Published online by Cambridge University Press:  03 September 2012

R. Drol ,
E. Simoni ,
R. Cavcllcc ,
V. Pradin ,
Ch. Dcnauwcr  and
J. J. Ehrhardl
R. Drol
Affiliation:
Institut de Physique Nucléaire, Groupe dc Radiochimic, Bâl. 1(K), 91406 Orsay Cedex.
E. Simoni
Affiliation:
Institut de Physique Nucléaire, Groupe dc Radiochimic, Bâl. 1(K), 91406 Orsay Cedex.
R. Cavcllcc
Affiliation:
Institut de Physique Nucléaire, Groupe dc Radiochimic, Bâl. 1(K), 91406 Orsay Cedex.
V. Pradin
Affiliation:
Institut de Physique Nucléaire, Groupe dc Radiochimic, Bâl. 1(K), 91406 Orsay Cedex.
Ch. Dcnauwcr
Affiliation:
CEA, DCC/DRDD, service d'éludes cl de modélisation des procédés ValRho, BP 171, 30207 Bagnols/cc/e, au LURE, université Paris-Sud, 91405 Orsay Cedex.
J. J. Ehrhardl
Affiliation:
LCPE-CNRS-UIIP, 405 rue de Vandœuvre, 54600 Villcrs-lès-Nancy.
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Abstract

Most of the studies on sorption processes take into account only a ihcrmodynamic approach, and only lew studies have paid attention to ihc structural aspect (i.e. structure of ihc postulated surface complex). Experiments were conducted to study UO22+ sorption onto zirconium and thorium phosphate surfaces. Moreover, in order to identify the nature of the sorption sites and the structure of the surface complex, various spectroscopie techniques such as EXAFS, XPS and laser induced fluorescence have been used. Two different types of sorption sites on the thorium phosphate but only one on the zirconium phosphate have been detected.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 465: Symposium II – Scienfific Basis for Nuclear Waste Management XX , 1996 , 827
Copyright
Copyright © Materials Research Society 1997

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References

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