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Silver Zeolites: Iodide Occlusion and conversion to Sodalite – a potential 129I waste form?

Published online by Cambridge University Press:  21 March 2011

Gareth P Sheppard ,
Joseph A Hriljac ,
Ewan R Maddrell  and
Neil C Hyatt
Gareth P Sheppard
Affiliation:
School of Chemistry, University of Birmingham, Egbaston, Birmimingham, B15 2TT., UK
Joseph A Hriljac
Affiliation:
School of Chemistry, University of Birmingham, Egbaston, Birmimingham, B15 2TT., UK
Ewan R Maddrell
Affiliation:
Nexia Solutions, Sellafield, Seascale, Cumbria, CA20 1PG., UK
Neil C Hyatt
Affiliation:
Immobilisation Science Laboratory, Department of Engineering Materials, The University of Sheffield, Mappin Street, Sheffield, S1 3JD., UK
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Abstract

Silver exchanged zeolites A, X and Y were used to occlude silver iodide (AgI) at 400°C. Heating to 900°C in a hot isostatic press caused decomposition of the zeolite materials and the formation of more dense phases. Silver zeolites A and X both formed sodalite, seen as a potential 129I waste form, while silver zeolite Y formed an x-ray amorphous phase containing AgI. Silver zeolite A produced the best potential waste form, a monolithic sodalite with negligible porosity.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 932: Symposium – Scientific Basis for Nuclear Waste Management XXIX , 2006 , 36.1
Copyright
Copyright © Materials Research Society 2006

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References

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