Investigation of the influence of acetate ions on cadmium extraction with D2EHPA

被引：12
|
作者：
Bidari, Ehsan [1 ]
Irannajad, Mehdi [1 ]
Gharabaghi, Mandi [2 ]
机构：
[1] Amirkabir Univ Technol, Dept Min & Met Engn, Tehran, Iran
[2] Univ Tehran, Coll Engn, Sch Min Engn, Tehran 14174, Iran
来源：
HYDROMETALLURGY | 2014年 / 144卷
关键词：
Solvent extraction; Cadmium; Phosphoric acid extractant; Acetate solution; SOLVENT-EXTRACTION; SULFATE-SOLUTIONS; CARBOXYLIC-ACIDS; PHOSPHORIC-ACID; SEPARATION; CHLORIDE; COPPER(II); MIXTURES; MEDIA; ZINC;
D O I：
10.1016/j.hydromet.2014.02.004
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
In this paper, effect of acetate ions on cadmium solvent extraction with di-2-ethyl hexyl phosphoric acid. D2EHPA, in kerosene as diluent has been investigated. Infrared spectroscopy and slope analysis methods were used to determine metal-organic complex and reaction stoichiometry respectively. Results showed that acetate ions did not participate in the complex formation but acted as a buffering agent. It was found that acetate could greatly improve the extraction yield. Maximum distribution coefficients were observed in the presence of 0.05 to 0.25 M acetate corresponding to the equilibrium pH of 4.14 to 4.70. The mechanism of cadmium extraction from acetate solution can be represented at equilibrium by: Cd2++2(H(2)A(2))(org)-(CdA(2)(HA)(2))(org)+2H(+). (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：129 / 132
页数：4
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