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Sorption of Pu(IV) and Tc(IV) on concrete and mortar and effect of the complexation by isosaccharinic acid.

Published online by Cambridge University Press:  28 March 2012

H. Rojo ,
M. García-Gutiérrez ,
T. Missana  and
H. Galán
H. Rojo
Affiliation:
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas. CIEMAT. Av. Complutense, 40. 28040, Madrid, Spain.
M. García-Gutiérrez
Affiliation:
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas. CIEMAT. Av. Complutense, 40. 28040, Madrid, Spain.
T. Missana
Affiliation:
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas. CIEMAT. Av. Complutense, 40. 28040, Madrid, Spain.
H. Galán
Affiliation:
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas. CIEMAT. Av. Complutense, 40. 28040, Madrid, Spain.
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Abstract

Batch sorption experiments were carried out, in a glove box under N2 atmosphere, for analysing the effect of increasing ISA (isosaccharinic acid) concentrations on sorption of Tc(IV) and Pu(IV) onto previously characterised Spanish concrete and mortar used in a radioactive waste repository. Results clearly showed that concentrations of ISA around 10-4–10-3 M are able to decrease the distribution coefficients (Rd) of the tetravalent elements analysed, both on concrete and mortar. The decrease in Rd experimentally observed was approximately 2 orders of magnitude for technetium and between 3 and 5 orders of magnitude for plutonium.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1475: Symposium NW – Scientific Basis for Nuclear Waste Management XXXV , 2012 , imrc11-1475-nw35-p55
Copyright
Copyright © Materials Research Society 2012

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References

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