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Speciation of Pu(Vi) in Near-Neutral to Basic Solutions via Spectroscopy

Published online by Cambridge University Press:  21 February 2011

Shigeo Okajima ,
Donald T. Reed ,
James J. Mazer  and
Carmen A. Sabau
Shigeo Okajima
Affiliation:
Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439
Donald T. Reed
Affiliation:
Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439
James J. Mazer
Affiliation:
Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439
Carmen A. Sabau
Affiliation:
Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439
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Abstract

The high sensitivity technique of laser photoacoustic spectroscopy and optical absorption spectroscopy were utilized to investigate the hydrolysis of Pu(VI) in perchlorate media. Absorption bands attributed to the hydrolysis of Pu(VI) were characterized in the pH = 6–8 regime which is of most interest to the proposed repository site at Yucca Mountain. Evidence was presented that supported the assignment of the polynuclear species (640 nm species) reported previously \1] as (PuO2)3(OH)5+1. Some temperature-dependent LPAS spectra are reported. The results obtained were compared to the predicted speciation of the geochemical code EQ3NR using the associated data base.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 176: Symposium U – Scientific Basis for Nuclear Waste Management XIII , 1989 , 583
Copyright
Copyright © Materials Research Society 1990

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References

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