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The Radiation Induced Chemistry of the Uranyl Cation in Carbonate –Bicarbonate Solutions as Followed by NMR Spectroscopy

Published online by Cambridge University Press:  26 February 2011

Bruce Kevin McNamara ,
Lanee A. Snow ,
Chuck Z. Soderquist ,
Sergei Sinkov ,
Herman M. Cho  and
Judah I. Friese
Bruce Kevin McNamara
Affiliation:
[email protected], Pacific Northwest National Laboratory, Environmental Technology Division, PO Box 999, Richland, Washington, 99352, United States, 509-376-1408
Lanee A. Snow
Affiliation:
[email protected], United States
Chuck Z. Soderquist
Affiliation:
[email protected]
Sergei Sinkov
Affiliation:
[email protected]
Herman M. Cho
Affiliation:
[email protected]
Judah I. Friese
Affiliation:
[email protected]
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Abstract

Hydrogen peroxide formed by radiolysis of carbonate –bicarbonate media was followed by 13C NMR using dissolved [233UO2(13CO3)3]4- as the alpha source (Dα=12.1 Gy/hr). It is shown that the speciation of the peroxide carbonates (or other species) that are formed in the pH region 5.9 and 11.6 by titration with hydrogen peroxide are common to those formed by hydrogen peroxide generated by radiolysis. Radiolytic generation of hydrogen peroxide was followed by observing the formation of a uranyl peroxide carbonate complex. Complex formation was observed to accelerate for about 1200 hours and to terminate between 1×10-4 and 5×10-4 M. It is assumed that either a steady state H2O2 production rate was established in solution or that some limiting feature of the experiment was responsible for slowing the yield of product.

Keywords

actinideradiation effectsnuclear magnetic resonance (NMR)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 893: Symposium JJ – Actinides 2005 – Basic Science, Applications and Technology , 2005 , 0893-JJ08-07
Copyright
Copyright © Materials Research Society 2006

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References

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