RAMAN-SPECTROSCOPIC DETERMINATION OF EQUILIBRIUM-CONSTANTS OF URANYL SULFATE COMPLEXES IN AQUEOUS-SOLUTIONS

被引：21

作者：

BURNEAU, A ^{[1
]}

TAZI, M ^{[1
]}

BOUZAT, G ^{[1
]}

机构：

[1] CTR RECH VALORISAT MINERAIS,CNRS,UA 235,F-54501 VANDOEUVRE NANCY,FRANCE

来源：

TALANTA | 1992年 / 39卷 / 07期

关键词：

D O I：

10.1016/0039-9140(92)80089-V

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Raman spectra are used to determine the formation constants of uranyl sulphate complexes in aqueous solutions at 20-degrees and remedy the confusion existing in this area in the available literature. Solutions with a varying total sulphate concentration and an ionic strength lower than 0.4M are analysed. The species UO2SO4 and UO2(SO4)22- are characterized by a resolved Raman band at 861 cm-1 and an unresolved one at 852 cm-1, corresponding to the uranyl symmetrical stretching vibration. The equilibrium constants, in term of activity (standard state 1M), are found to be about 1400 and 11, respectively, for the consecutive reactions: UO22+(aq)+SO42-(aq) = UO2SO4(aq) and UO2SO4(aq)+SO42-(aq) = UO2(SO4)22-(aq).

引用

页码：743 / 748

页数：6

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