Extraction of Uranium from Aqueous Solutions by Using Ionic Liquid and Supercritical Carbon Dioxide in Conjunction

被引：58

作者：

Wang, Joanna Shaofen ^{[1
]}

Sheaff, Chrystal N. ^{[1
]}

Yoon, Byunghoon ^{[1
]}

Addleman, R. Shane ^{[2
]}

Wai, Chien M. ^{[1
]}

机构：

[1] Univ Idaho, Dept Chem, Moscow, ID 83844 USA

[2] Pacific NW Natl Lab, Richland, WA 99352 USA

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2009年 / 15卷 / 17期

关键词：

carbon dioxide; ionic liquids; supercritical fluids; uranium; UV/Vis spectroscopy; FLUID EXTRACTION; SOLID MATERIALS; COMPLEXATION; LANTHANIDES; HYDROLYSIS; METALS;

D O I：

10.1002/chem.200801415

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Uranyl ions [UO2](2+) in aqueous nitric acid can be extracted into supercritical CO2 (sc-CO2) by using an imidazolium-based ionic liquid with tri-n-butyl phosphate (TBP) as a complexing agent. The transfer of uranium from the ionic liquid to the supercritical fluid phase was monitored by UV/Vis spectroscopy using a high-pressure fiber-optic cell. The form of the uranyl complex extracted into the sc-CO2 phase was identified to be [UO2(NO3)(2)-(TBP)(2)] The extraction results were confirmed by fluorescence spectroscopy and by neutron activation analysis. This technique has potential applications in the field of nuclear waste management for extracting other actinides.

引用

页码：4458 / 4463

页数：6

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