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Modelling of the Migration of lanthanoids and Actinoids in Ground Water; The Medium Dependence of Equilibrium Constants.

Published online by Cambridge University Press:  15 February 2011

G. Biedermann ,
J. Bruno ,
D. Ferri ,
I. Grenthe ,
F. Salvatore  and
K. Spahiu
G. Biedermann
Affiliation:
Department of Inorganic Chemistry, Royal Institute of Technology, S-10044 Stockholm, Sweden
J. Bruno
Affiliation:
Department of Inorganic Chemistry, Royal Institute of Technology, S-10044 Stockholm, Sweden
D. Ferri
Affiliation:
Department of Inorganic Chemistry, Royal Institute of Technology, S-10044 Stockholm, Sweden
I. Grenthe
Affiliation:
Department of Inorganic Chemistry, Royal Institute of Technology, S-10044 Stockholm, Sweden
F. Salvatore
Affiliation:
Department of Inorganic Chemistry, Royal Institute of Technology, S-10044 Stockholm, Sweden
K. Spahiu
Affiliation:
Department of Inorganic Chemistry, Royal Institute of Technology, S-10044 Stockholm, Sweden
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Extract

Radioactive products may be released from a nuclear waste repository to the biosphere through dissolution in, and transport by ground-water. The fundamental chemical phenomena involved are solubility, complex formation, redox and sorption (e.g. ion-exchange) processes. A first estimate of the behaviour of the waste-repository-ground water system is usually obtained by using a chemical equilibrium model in order to calculate properties such as chemical speciation and solubilities of important radionuclides. For practical reasons the modelling is often made in two different regions, the near field and the far field. In the latter, the main components of the aqueous phase are essentially those of undisturbed groundwater, while in the former substantial changes in composition may occur. The total electrolyte concentration is usually small, at least in the farfield region.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 11: Symposium – Scientific Basis for Nuclear Waste Management V , 1981 , 791
Copyright
Copyright © Materials Research Society 1982

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References

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