Hydroxylamine Derivative in Purex Process III. The Kinetics of Oxidation-reduction Reaction Between N,N-diethylhydroxylamine and Neptunium(VI) |
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| Authors: | Zhang Anyun Liu Ying |
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| Affiliation: | (1) Department of Chemistry, Shaanxi Normal University, Xi'an, 710062, P. R. China;(2) Library, Shaanxi Normal University, Xi'an, 710062, P. R. China |
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| Abstract: | The kinetics of oxidation-reduction reaction between N,N-diethylhydroxylamine (DEHAN) and neptunium (VI) in nitric acid media has been studied by spectrophotometry at 25.2 °C. The rate equation is -d[Np(VI)/dt=k[Np(VI)][DEHAN]/[H+] found by investigating the influence of concentration, acidity, ionic strength and temperature on the reaction. The rate constant of the reaction k is 23.0±1.8 min–1 for  = 2.0 mol/l. A possible mechanism of reaction has been suggested according to the ESR spectra of nitroxide radical produced in the DEHAN+V(V) system. |
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