Free-radical redox reactions of uranium ions in sulphuric acid solutions
- 1 February 1986
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 64 (2) , 314-320
- https://doi.org/10.1139/v86-053
Abstract
The radiolytic reduction of uranyl ions in degassed sulphuric acid solutions containing various organic solutes was studied. It was shown that while .ovrhdot.COOH, CO2-, and .alpha.-hydroxy-alkyl radicals reduced uranyl ions, the .beta.-hydroxy-alkyl radicals and those derived from gluconic acid could not affect the reduction. The oxidation of uranium(IV) by hydrogen peroxide at pH 0.7 involves hydroxyl radicals in a chain mechanism but at pH 2.0 the oxidation proceeds by a non-radical reaction pathway. From the enhancement of the rate of oxidation of uranium(IV) by oxygen in the presence of 2-propanol, a mechanism involving the perhydroxyl radical, which reconciles earlier published data on kinetics and oxygen tracer studies, is proposed for the oxygen-uranium(IV) reactions.This publication has 1 reference indexed in Scilit:
- ABSORPTION SPECTRA OF URANIUM(III) AND URANIUM(IV) IN DClO4 SOLUTION1The Journal of Physical Chemistry, 1960