Extraction of U(VI) and Th(IV) from nitric acid medium using tri(butoxyethyl) phosphate (TBEP) in n-paraffin

被引：18
|
作者：
Biswas, Sujoy [1 ]
Hareendran, K. N. [1 ]
Singh, D. K. [2 ]
Sharma, J. N. [3 ]
Roy, S. B. [1 ]
机构：
[1] Bhabha Atom Res Ctr, Uranium Extract Div, Mumbai 400085, Maharashtra, India
[2] Bhabha Atom Res Ctr, Rare Earths Dev Sect, Mumbai 400085, Maharashtra, India
[3] Bhabha Atom Res Ctr, Hydromet Sect, Mumbai 400085, Maharashtra, India
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2010年 / 283卷 / 03期
关键词：
TBEP; Uranium; Thorium; Solvent extraction; FTIR; Solvation mechanism; SEPARATION; URANIUM; SPECTRA;
D O I：
10.1007/s10967-010-0453-4
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Extraction behavior of U(VI) and Th(IV) from nitric acid medium is investigated using organo-phosphorous extractant, tri(butoxyethyl) phosphate in n-paraffin at room temperature (27 +/- A 1 A degrees C). The effect of diluents, nitric acid concentration as well as extractant concentration on extraction of U(VI) and Th(IV) are evaluated. Extraction of U(VI) and Th(IV) from nitric acid medium proceeds via solvation mechanism. Slope analysis technique showed the formation of neutral complexes of the type of UO2(NO3)(2)center dot 2TBEP and Th(NO3)(4)center dot 3TBEP with U(VI) and Th(IV) respectively in the organic phase. The FTIR data showed shifting of P=O stretching frequency from 1,282 to 1,217 cm(-1) indicating the strong complexation of P=O group with UO2 (2+) ions in the organic phase. Effect of stripping agents, other metal ions and their separation with respect to U(VI) extraction has also been investigated.
引用
收藏
页码：665 / 668
页数：4
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