KINETIC ISOTOPE EFFECT IN PENTAVALENT PLUTONIUM DISPROPORTIONATION INHETEROGENEOUS SYSTEMS

Authors
GARNOV YY NIKITENKO SI
Citation
Yy. Garnov et Si. Nikitenko, KINETIC ISOTOPE EFFECT IN PENTAVALENT PLUTONIUM DISPROPORTIONATION INHETEROGENEOUS SYSTEMS, Journal of radioanalytical and nuclear chemistry, 187(2), 1994, pp. 151-157
Citations number
5
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Analytical","Nuclear Sciences & Tecnology
Journal title
Journal of radioanalytical and nuclear chemistry → ACNP
ISSN journal
02365731
Volume
187
Issue
2
Year of publication
1994
Pages
151 - 157
Database
ISI
SICI code
0236-5731(1994)187:2<151:KIEIPP>2.0.ZU;2-F
Abstract
A kinetic isotope effect in Pu(V) disproportionation in nitric acid so lutions have been observed in a heterogeneous system with phenyloctylp hosphonic acid deposited on hydrophobized silicagel. The isotope separ ation coefficient alpha for Pu-242/Pu-239 isotopes was found to be 1.0 22 at 25-degrees-C. The rate constant of Pu(V) disproportionation in t his heterogeneous system was determined to be 5.0+/-0.6 l2mol-2s-1 at 25-degrees-C, [HNO3] = = 0.87-1.5 mol l-1 and 1:1 phase ratio (10% ext ractant on the support).