Abstract
U(IV) is extremely slowly oxidized by nitric acid in the absence of air in a 30% solution of tributyl phosphate in dodecane, in dilute aqueous solutions of nitric acid containing hydrazinium nitrate and in liquid-liquid dispersions formed by the two solutions. The oxidation of U(IV) by air oxygen in the organic solution is a rather slow first order reaction with a rate constant independent of the nitric acid concentration; there is a pronounced tendency for the oxidation to be accelerated by autocatalysis. In the aqueous solutions and the dispersions the oxidation of U(IV) by atmospheric oxygen is faster and exhibits an apparent zero reaction order with respect to U(IV). Pu(III) and Fe(II) retard oxidation in the dispersions. The dependence of the apparent rate constant in the aqueous solutions and dispersions on the nitric acid concentration was mathematically described and shown to be altered in the presence of Pu(III). In the dispersions U(IV) appears to be oxidized by atmospheric oxygen predominantly in the aqueous phase.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
