Extraction of copper(II)-NTA chelated anions from water with Aliquat 336

被引：12

作者：

Juang, RS ^{[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 / 12期

关键词：

extraction; distribution ratio; copper(II); Aliquat; 336; NTA;

D O I：

10.1081/SS-100100781

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Streams containing metals and complexing agents, which are often encountered in industrial and environmental applications, are not easily treated using conventional chemical precipitation processes. A solvent extraction method is thus proposed in this work. The distribution ratios of Cu(II) between kerosene solutions of Aliquat 336 (tri-n-octylmethylammonium chloride) and the water-containing complexing agent NTA (nitrilotriacetic acid) were measured. Experiments were carried out as a function of aqueous pH, the concentration of amine, and temperature. It is shown that the distribution ratios first increased with increasing pH and then decreased with a further ; crease in pH. The enthalpy of the extraction was determined; Finally, the nonideal behavior of the organic phase is discussed.

引用

收藏

页码：2407 / 2420

页数：14

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