Liquid-liquid extraction of uranium(VI) and thorium(IV) by two open-chain crown ethers with terminal quinolyl groups in chloroform

被引：7

作者：

Zhijun, Guo ^{[1
]}

Wangsuo, Wu ^{[1
]}

Dadong, Shao ^{[1
]}

Minyu, Tan ^{[1
]}

机构：

[1] College of Chemistry and Chemical Engineering, Lanzhou University

来源：

Journal of Radioanalytical and Nuclear Chemistry | 2003年 / 258卷 / 01期

关键词：

Distribution ratio - Extractability - Extractant concentration - Extraction conditions - H NMR spectra - IR spectrum - Liquid-liquid extraction - Mass spectra - Open chain crown ether;

D O I：

10.1023/A:1026203402893

中图分类号：

学科分类号：

摘要：

Two open-chain crown ethers 2,2'-(ethylenedioxy)bis[(8-quinolyloxymethyl)benzene], (L1), and 2,2'-(ethylenedioxy)bis[(8-quinaldyloxymethyl)benzene], (L2) have been prepared and characterized by using elemental analysis, IR spectra, 1H NMR spectra and positive-ion FAB mass spectra. The extraction of UO2 2+ and Th4+ by both open-chain crown ethers, L1 and L2 in chloroform as a diluent was studied at 25 °C. Extraction distribution ratios (D) of UO22+ and Th4+ were investigated as a function of pH, lithium picrate concentration, and extractant concentration. Based on the expertimental results, it was found that 1:1 complexes were formed involving either UO22+ of Th 4+ with L1, and Th4+ with L2. The extractability of L1 for Th4+ is significantly higher than that for UO2 2+, the extractabilities of L1 and L2 for Th4+ being almost identical. L1 and L2 used here are not feasible for industry because of their relatively low extractabilities for Th4+ at pH<2.0 and for UO22+ at the extraction conditions used in this work.

引用

页码：199 / 203

页数：4

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