Separation of uranium(VI) and americium(III) by Extraction from Na2CO3–H2O2 solutions using methyltrioctylammonium carbonate in toluene

IF 1.8 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Solvent Extraction and Ion Exchange Pub Date : 2021-11-10 DOI:10.1080/07366299.2021.1876993

Alexander Valentinovich Boyarintsev, Galina Valerievna Kostikova, Sergey Illarionovich Stepanov, Andrei Аleksandrovich Shoustikov, Alexander Mihailovich Chekmarev, Aslan Yusupovich Tsivadze

引用次数: 2

Abstract

ABSTRACT Liquid–liquid extraction of carbonate and mixed peroxo-carbonate compounds of U(VI) and Am(III) from Na2CO3 aqueous solutions by methyltrioctylammonium carbonate in toluene has been studied. The main patterns of effect of extractant, Na2CO3, and H2O2 concentration on distribution and separation of U(VI) and Am(III) have been established. Using slope analysis and UV–vis spectroscopy, the compositions of U(VI) and Am(III) extractable compounds are established as (R4N)4[UO2(CO3)3], (R4N)4[UO2(О2)(CO3)2], and (R4N)6[(UO2)2(O2)(CO3)4] for U(VI); R4N[Am(CO3)2] and (R4N)3[Am(CO3)3] for Am(III), where R4N is the quaternary ammonium cation. The obtained data showed high efficiency of the studied carbonate system for extraction of U(VI) and its purification from Am(III). The maximum separation factor of U(VI) and Am(III) was 25.

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甲基三辛基碳酸铵在甲苯中萃取Na2CO3-H2O2溶液分离铀(VI)和镅(III

摘要研究了碳酸甲基三辛基铵在甲苯中从Na2CO3水溶液中液-液萃取碳酸盐和U（VI）和Am（III）的混合过氧碳酸盐化合物。建立了萃取剂、Na2CO3和H2O2浓度对U（VI）和Am（III）分布和分离的主要影响模式。使用斜率分析和紫外-可见光谱，U（VI）和Am（III）可提取化合物的组成被确定为U（VI；R4N[Am（CO3）2]和（R4N）3[Am（CO3）3]用于Am（III），其中R4N是季铵阳离子。所获得的数据显示所研究的碳酸盐体系对U（VI）的提取及其从Am（III）中纯化的高效性。U（VI）和Am（III）的最大分离因子为25。

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来源期刊

Solvent Extraction and Ion Exchange 化学-化学综合

CiteScore

4.40

自引率

5.00%

发文量

审稿时长

8.4 months

期刊介绍： Solvent Extraction and Ion Exchange is an international journal that publishes original research papers, reviews, and notes that address all aspects of solvent extraction, ion exchange, and closely related methods involving, for example, liquid membranes, extraction chromatography, supercritical fluids, ionic liquids, microfluidics, and adsorption. We welcome submissions that look at: The underlying principles in solvent extraction and ion exchange; Solvent extraction and ion exchange process development; New materials or reagents, their syntheses and properties; Computational methods of molecular design and simulation; Advances in equipment, fluid dynamics, and engineering; Interfacial phenomena, kinetics, and coalescence; Spectroscopic and diffraction analysis of structure and dynamics; Host-guest chemistry, ion receptors, and molecular recognition.