Interaction of Ozone with Variable-Valence Metal Ions in Concentrated Silicate Solutions

被引：1
|
作者：
Gogolev, A. V. [1 ]
Shilov, V. P. [1 ]
机构：
[1] Russian Acad Sci, Frumkin Inst Phys Chem & Electrochem, Moscow 119071, Russia
来源：
RUSSIAN JOURNAL OF GENERAL CHEMISTRY | 2014年 / 84卷 / 08期
关键词：
chromium; iron; manganese; neptunium; ozone; sodium silicate; OXIDATION; KINETICS; WATER;
D O I：
10.1134/S1070363214080027
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Spectrophotometric studies have revealed that ozone oxidizes Cr(III) into Cr(VI), Fe(III) into Fe(VI), Mn(VI) into Mn(VII), and Np(VI) into Np(VII) in the concentrated aqueous silicate solutions. Cr(III) oxidation is accelerated in alkaline-silicate and alkaline solutions as compared to neutral silicate solution. Ferrate and permanganate ions are unstable in Na2SiO3 solutions (0.5-1.3 mol/L of the silicate). Neptunium(VII) ions formed in the course of ozonation are stable in Na2SiO3 solution (1 mol/L) upon drying in air to form solid vitreous mass.
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页码：1468 / 1471
页数：4
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