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Significance of Electrostatic Sorption in the Retardation of Radionuclides Released from a Repository

Published online by Cambridge University Press:  15 February 2011

H. Meier ,
E. Zimmerhackl ,
G. Zeitler  and
P. Menge
H. Meier
Affiliation:
Staatliches Forschungsinstitut für Geochemie, D-96049 Bamberg, Germany
E. Zimmerhackl
Affiliation:
Staatliches Forschungsinstitut für Geochemie, D-96049 Bamberg, Germany
G. Zeitler
Affiliation:
Staatliches Forschungsinstitut für Geochemie, D-96049 Bamberg, Germany
P. Menge
Affiliation:
Staatliches Forschungsinstitut für Geochemie, D-96049 Bamberg, Germany
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Abstract

Results of zeta potential measurements by electroosmosis with site-specific waters and sedimentary rocks from strata overlying the Gorleben salt dome are given and compared with sorption data of radionuclides obtained in batch experiments. It is shown that zeta potentials of sediment-groundwater systems in spite of being lower than the corresponding surface potentials are a sensitive indicator of interface reactions depending on the type of the sediment, ionic strength of waters, pH and temperature. Moreover, it is demonstrated that sorption data and, additionally, the influence of various parameters can often be understood by taking into account variable electrostatic forces between charged surfaces and nuclide species.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 353: Symposium – Scientific Basis for Nuclear Waste Management XVIII , 1994 , 1061
Copyright
Copyright © Materials Research Society 1995

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References

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