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Aqueous Dissolution of Rb-Bearing Hollandite and Synroc-C at 90°C

Published online by Cambridge University Press:  21 March 2011

M. L. Carter ,
E. R. Vance ,
G. R. Lumpkin  and
E. Loi
M. L. Carter
Affiliation:
Materials Division, ANSTO, Menai, NSW 2234, Australia
E. R. Vance
Affiliation:
Materials Division, ANSTO, Menai, NSW 2234, Australia
G. R. Lumpkin
Affiliation:
Materials Division, ANSTO, Menai, NSW 2234, Australia
E. Loi
Affiliation:
Materials Division, ANSTO, Menai, NSW 2234, Australia
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Abstract

Rb-doped Ba-hollandite and synroc-C samples were prepared for aqueous dissolution studies at 90°C in deionized water using MCC-1 protocols. Small amounts of possibly Rb-bearing BaTiO3, hibonite and alumina accompanied the major Rb-doped (0.1 formula units) hollandite phase. The Rb loadings in the synroc samples ranged from 0.89 to 2.67 wt%. Rb leached at <0.2 g/m2/d from hollandite samples and <0.1g/m2d from synroc, with the values decreasing with increasing dissolution time. The variance between the dissolution rates for the different Rb-doped hollandite and synroc samples is discussed, in terms of Rb-bearing minor phases.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 663: Symposium – Scientific Basis for Nuclear Waste management XXIV , 2000 , 381
Copyright
Copyright © Materials Research Society 2001

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References

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