Extraction thermodynamics of Th(IV) in various aqueous organic systems

被引：18
作者：
Ei-Sweify, F. H. [1 ]
Abdel-Fattah, A. A. [1 ]
Ali, S. M. [1 ]
机构：
[1] Ctr Atom Energy Author, Hot Lab, Dept Nucl Chem, Radioisotopes Prod Div, Cairo, Egypt
来源：
JOURNAL OF CHEMICAL THERMODYNAMICS | 2008年 / 40卷 / 05期
关键词：
Th(IV); TBP; HDEHP; Arsenazo-III; bromide; iodide;
D O I：
10.1016/j.jct.2008.01.013
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Thermodynamic studies on solvent extraction of Th(IV) have been carried out using TBP and HDEHP as extractants in toluene from aqueous bromide and iodide media containing Arsenazo-III as a colouring reagent. This reagent was used for the spectrophotometric determination of Th(IV). The study was carried out at T = {(283, 298, 313) +/- 1) K to evaluate IgK(ex) as well as the thermodynamic functions Delta G degrees, Delta H degrees, and Delta S degrees of the extraction reactions. The extracted species and the overall extraction mechanisms are postulated. (C) 2008 Elsevier Ltd. All rights reserved.
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收藏
页码：798 / 805
页数：8
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