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

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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.

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Authors and Affiliations

  1. Pacific National Northwest Laboratories, 99352, Richland, Washington, USA

    Bruce McNamara, Lanee Snow, Chuck Soderquist, Sergei Sinkov, Herman Cho & Judah Friese

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  1. Bruce McNamara
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  2. Lanee Snow
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  3. Chuck Soderquist
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  4. Sergei Sinkov
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  5. Herman Cho
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  6. Judah Friese
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McNamara, B., Snow, L., Soderquist, C. et al. The Radiation Induced Chemistry of the Uranyl Cation in Carbonate –Bicarbonate Solutions as Followed by NMR Spectroscopy. MRS Online Proceedings Library 893, 8930807 (2005). https://doi.org/10.1557/PROC-0893-JJ08-07

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  • DOI: https://doi.org/10.1557/PROC-0893-JJ08-07

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