Extraction separation of Am(III) and Eu(III) using divalent quadridentate Schiff bases-bis-salicylaldehyde ethylenediamine

被引：5
|
作者：
Geng, Yanxia [2 ]
Li, Zhan [2 ]
Pan, Duoqiang [2 ]
Wu, Wangsuo [1 ,2 ]
机构：
[1] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
[2] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2011年 / 289卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Americium; Europium; Extraction; Separation; Schiff base ligand; SOLVENT-EXTRACTION; COMPLEXES; CHEMISTRY; COPPER(II); LANTHANIDES; BEHAVIOR; LIGANDS; UO2(II); URANYL; TH(IV);
D O I：
10.1007/s10967-011-1052-8
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
For the selective extraction of Am(III) and Eu(III), quadridentate divalent phenolic Schiff bases-bis-salicylaldehyde ethylenediamine (H(2)salen) was investigated as a kind of extractant. The influences of alkaline cation, inorganic anion, ionic strength, pH and the concentration of H(2)salen on the distribution ratio of Am(III) and Eu(III) were investigated in detail. As a result, Am(III) and Eu(III) made anionic 1:1 complexes with the ligand (H(2)salen) and could be extracted into nitrobenzene as ion-pairs with a suitable monovalent counter anion in the aqueous solution, the extracted species were possibly of the type Am(H(2)salen) Eu(salen)Cl and Eu(H(2)salen)Cl-3, respectively. The extractability of Eu(III) was significantly stronger than that of Am(III) and the maximum separation factor, SF(Am/Eu), was 96 at pH 4.0. The results indicated that H(2)salen had good selectivity for Am(III) and Eu(III).
引用
收藏
页码：83 / 90
页数：8
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