Viability of the separation of Cd from highly concentrated Ni-Cd mixtures by non-dispersive solvent extraction

被引：24
作者：
Galan, B [1 ]
San Roman, F [1 ]
Irabien, A [1 ]
Ortiz, I [1 ]
机构：
[1] ETSIIyT, Dept Quim, Santander 39005, Spain
来源：
CHEMICAL ENGINEERING JOURNAL | 1998年 / 70卷 / 03期
关键词：
cadmium (Cd); non-dispersive solvent extraction; nickel (Ni);
D O I：
10.1016/S1385-8947(98)00101-6
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The separation of nickel and cadmium from highly concentrated solutions by means of non-dispersive solvent extraction (NDSX) has been studied in this work. Extraction and back-extraction processes were carried out simultaneously in a batch mode using two parallel modules and the organic phase flowing in a closed circuit. Starting with concentrations of 0.37 M of Cd and 0.37-0.68 M of Ni in the feed aqueous phase, 1 M of H2SO4 in the back-extraction phase, and using D2EHPA as extractant, the viability of the separation-concentration of Cd from that mixture has been confirmed. Under the experimental conditions, the separation process was run at a constant rate of mass transport, thus leading to a selectivity factor in the concentration step rho=67 mol Cd/mol Ni. (C) 1998 Elsevier Science S.A. All rights reserved.
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页码：237 / 243
页数：7
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