Oxidation of variable-valence cations with ozone: II. Selection of a cation catalyzing oxidative dissolution of plutonium oxide

被引：0

作者：

Nikitina, GP ^{[1
]}

Ivanov, YE ^{[1
]}

Shumkov, VG ^{[1
]}

Egorova, VP ^{[1
]}

机构：

[1] Res & Prod Assoc, Khlopin Radium Inst, St Petersburg, Russia

来源：

RADIOCHEMISTRY | 1999年 / 41卷 / 06期

关键词：

D O I：

暂无

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Main features of reactions of variable-valence cations Mn+ [Mn+ = Ag(I), Ru(IV), Ce(III), TI(I), Np(IV, V), Pu(IV)] with ozone in nitric acid solutions were studied. The kinetic parameters of reaction of Np(IV) and Pu(IV) with O-3 in a wide range of reaction conditions were determined. The mechanism of intraspheric oxidation involving formation of outerspheric complex of the ion being oxidized with ozone (Mn+ <--OH2... O-3) with subsequent substitution of intraspheric water molecule with ozone or detachment of the hydrogen atom from the hydrate water molecule to form Mn+<--OH and HO3 was proposed. Plutonium(IV) is most likely to be oxidized with ozone via formation of Pu4+<--O-3 complex. Ag(I), Ce(III), and Co(II) were chosen as catalysts of dissolution of PuO2 by its oxidation with ozone.

引用

页码：538 / 544

页数：7