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Uranium Speciation in Glass Corrosion Layers: an XAFSStudy

Published online by Cambridge University Press:  03 September 2012

Bruce M. Biwer ,
L. Soderholm ,
R. B. Greegort  and
F. W. Lytle
Bruce M. Biwer
Affiliation:
Argonne National Laboratory, Argonne IL 60439
L. Soderholm
Affiliation:
Argonne National Laboratory, Argonne IL 60439
R. B. Greegort
Affiliation:
The Boeing Company, Seattle, WA 98124 and
F. W. Lytle
Affiliation:
The EXAFS Company, Pioche, NV 89043
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Abstract

Uranium L3 X-ray absorption data were obtained from twoborosilicate glasses, which are considered as models for radioactivewasteforms, both before and after leaching. Surface sensitivity to uraniumspeciation was attained by a novel application of simultaneous fluorescenceand electron-yield detection. Changes in speciation are clearly discernible,from U(VI) in the bulk to (UO2)2+-uranyl in thecorrosion layer. The uranium concentrations within the corrosion layer alsoshow variations with leaching times that can be determined from thedata.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 465: Symposium II – Scienfific Basis for Nuclear Waste Management XX , 1996 , 229
Copyright
Copyright © Materials Research Society 1997

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References

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