Ion-pair extraction of uranyl ion from aqueous medium using crown ethers

被引：33

作者：

Mohapatra, PK ^{[1
]}

Manchanda, VK ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Div Radiochem, Bombay 400085, Maharashtra, India

来源：

TALANTA | 1998年 / 47卷 / 05期

关键词：

uranyl; crown ethers; separation; solvent extraction;

D O I：

10.1016/S0039-9140(98)00215-X

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Ion-pair extraction behaviour of uranyl ion from aqueous solutions was studied at pH 3.0 employing crown ethers viz. benzo 15 crown 5 (B15C5), 18 crown 6 (18C6), dibenzo 18 crown 6 (DB18C6), and dibenzo 24 crown 8 (DB24C8) in chloroform as the organic phase and picric acid as the organophilic counter anion. The stoichiometry of the extracted species corresponded to [UO2(crown ether)(n)](2+).[pic(-)](2) where n = 1.5 for benzo 15 crown 5 and 1 for 18 crown 6 as well as dibenzo 18 crown 6. Adducts of DB24C8 could not be observed as practically no extraction was possible using this reagent. The separation behaviour of fission products from an irradiated uranium target was also studied. An interesting observation on the separation of trivalent lanthanides from uranyl ion is reported. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：1271 / 1278

页数：8

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