Kinetics of Np(IV) oxidation with persulfate in alkali solutions

被引：0
|
作者：
Yusov, AB [1 ]
Garnov, AY [1 ]
Shilov, VP [1 ]
Krot, NN [1 ]
机构：
[1] Russian Acad Sci, Inst Phys Chem, Moscow, Russia
来源：
RADIOCHEMISTRY | 1997年 / 39卷 / 06期
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D O I：
暂无
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A 7 x 10(-3) M suspension of neptunium(IV) hydroxide in deaerated 0.5-14 M NaOH is oxidized with S2O82- to give successively Np(V), Np(VI), and Np(VII). The rates of all the reactions increase with temperature and with increasing concentrations of alkali and the oxidant. In 4-14 M NaOH, Np(IV) within less than 10 min at 21 degrees C is oxidized with 0.02 M S2O82- into Np(VI), which passes into the solution; this is followed by formation of Np(VII). A mechanism is proposed involving reactions of S2O82- with solid Np(OH)(4) and with dissolved Np(V) and Np(VI) hydroxides.
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页码：517 / 520
页数：4
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