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Diffusion of Chloride and Uranium in Compacted Sodium Bentonite

Published online by Cambridge University Press:  26 February 2011

Arto Muurinen ,
Pirkkd Pemtilä-Hiltunen  and
Kari Uusheimo
Arto Muurinen
Affiliation:
Technical Research Centre of Finland, Reactor Laboratory, Otakaari 3 A, SF-02150 Espoo, Finland
Pirkkd Pemtilä-Hiltunen
Affiliation:
Technical Research Centre of Finland, Reactor Laboratory, Otakaari 3 A, SF-02150 Espoo, Finland
Kari Uusheimo
Affiliation:
Technical Research Centre of Finland, Reactor Laboratory, Otakaari 3 A, SF-02150 Espoo, Finland
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Abstract

Sorption and diffusion of chloride (Cl-36) and uranium in conpacted sodium bentonite MX-80 were measured. No sorption was observed in the Sorption tests, however, in the diffusion tests slight sorption of uranium was noticed. The diffusivities of Cl-36 were found to be strongly dependent on the compaction of bentonite and on the salt concentration of the solution. Ion-exclusion can propably explain these phenomena.

The diffusivities of uranium were also strongly dependent on the compaction of bentonite. Uranium shews features of both ion-exclusion and sorption. Farther studies are, however, needed to explain the diffusion mechanisms of uranium.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 127: Symposium BERLIN – Scientific Basis for Nuclear Waste Management XII , 1988 , 743
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

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