Amine-based extraction recovery of Cu(II) from aqueous solutions in the presence of EDTA. Equilibrium studies

被引：17

作者：

Juang, RS ^{[1
]}

Chen, YJ ^{[1
]}

Huang, IP ^{[1
]}

机构：

[1] Yuan Ze Univ, Dept Chem Engn, Chungli 320, Taiwan

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 1999年 / 34卷 / 15期

关键词：

extraction equilibrium; distribution ratio; Cu(II); tri-n-octylamine; Aliquat; 336; EDTA;

D O I：

10.1081/SS-100100824

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The distribution ratios of Cu(II) between kerosene solutions of Aliquat 336 and water containing EDTA (ethylenediaminetetraacetic acid) are measured. Experiments were performed as a function of the pH, the concentration of Cu(II), the concentration ratio of EDTA to Cu(II), and the concentration of amine. It is shown that the distribution ratios first increase with pH and then decrease with a further increase in pH up to 7.0. The effect of temperature on the extraction was studied, and the enthalpy of the extraction reaction was determined. Finally, the nonideal behavior of the organic phase is discussed.

引用

页码：3099 / 3112

页数：14

共 21 条

[11] Measurement of binding constants of poly(ethylenimine) with metal ions and metal chelates in aqueous media by ultrafiltration [J].