Kinetics of Pu(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
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：
A 6.8 x 10(-3) M suspension of freshly precipitated Pu(IV) hydroxide in 0.5-8 M NaOH is oxidized with 0.01-0.05 M S2O82- at 23-62 degrees C to give Pu(VI); in 4-8 M NaOH Pu(VII) also appears. Dissolution of plutonium accelerates with temperature and with increasing NaOH and S2O82- concentrations. The reaction mechanism is discussed; its key stages are reaction of S2O82- with Pu(IV) and Pu(V) in the solid phase, disproportionation of Pu(V) in 0.5-4 M NaOH, and reaction of Pu(VI) with S2O82- in 4-8 M NaOH.
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页码：521 / 524
页数：4
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