Hydroxylamine derivative in Purex Process III. The kinetics of oxidation-reduction reaction between N,N-diethylhydroxylamine and neptunium(VI)

Authors
Zhang, AY Liu, Y
Citation
Ay. Zhang et Y. Liu, Hydroxylamine derivative in Purex Process III. The kinetics of oxidation-reduction reaction between N,N-diethylhydroxylamine and neptunium(VI), J RAD NUCL, 245(2), 2000, pp. 357-361
Citations number
10
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
ISSN journal
02365731 → ACNP
Volume
245
Issue
2
Year of publication
2000
Pages
357 - 361
Database
ISI
SICI code
0236-5731(200008)245:2<357:HDIPPI>2.0.ZU;2-Q
Abstract
The kinetics of oxidation-reduction reaction between N,N-diethylhydroxylami ne (DEHAN) and neptunium (VI) in nitric acid media has been studied by spec trophotometry at 25.2 degrees C. The rate equation is -d[Np(VI)] /dt=k[Np(V I)][DEHAN]/[H+] found by investigating the influence of concentration, acid ity, ionic strength and temperature on the reaction. The rate constant of t he reaction k is 23.0+/-1.8 min(-1) for mu =2.0 mol/l. A possible mechanism of reaction has been suggested according to the ESR spectra of nitroxide r adical produced in the DEHAN+V(V) system.