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Comparative study on extraction of copper(II) cations from highly saline media using 2-((phenylimino)methyl)phenol chelating mono-Schiff base /kerosene as novel extractant system
Journal of Environmental Chemical Engineering ( IF 7.7 ) Pub Date : 2021-09-11 , DOI: 10.1016/j.jece.2021.106351
M. Hadj Youcef 1 , H. Reffas 1 , T. Benabdallah 1
Affiliation  

The present investigation reports a fundamental extraction- recovery studies of high amount of copper(II) cations from different concentrated saline aqueous solutions including sulphate, chloride, and mixed chloride/ sulphate media with 2-((phenylimino)methyl)phenol extractant (HPIMP) in kerosene at 25 °C. The acid-dissociation constant (Ka) and distribution constant (Kd) between kerosene and various saline aqueous solutions of (HPIMP) were determined. The influence of different parameters namely contact time, organic to aqueous phase (O/A) ratio, pH-value, extractant concentration, and temperature, as well as the effect of anions on the extraction recovery process has been studied. The experimental results revealed that the extraction ability of the (HPIMP) towards Cu(II) ions depends on the nature of inorganic salt. A maximum extraction efficiency of 99.76% was obtained from a 1 M chloride medium, which is significantly higher than those obtained from the sulphate medium (E(%) = 79.13%) or the mixed chloride/sulphate medium (E(%) = 81.75%). The trends in the values of extraction constants were explained in terms of acidity and distribution constants of (HPIMP). From the thermodynamic analysis it is inferred that the extraction process is endothermic and favorable at high temperatures, leading to stable, extractable Cu-HPIMP complexes.



中文翻译:

2-((苯基亚氨基)甲基)苯酚螯合单希夫碱/煤油作为新型萃取剂体系从高盐介质中萃取铜(II)阳离子的对比研究

本研究报告了从不同的浓缩盐水溶液(包括硫酸盐、氯化物和混合氯化物/硫酸盐介质与 2-((苯基亚氨基)甲基)苯酚提取剂 (HPIMP) 中提取大量铜 (II) 阳离子的基本提取-回收研究)在 25 °C 的煤油中。酸解离常数 ( K a ) 和分布常数 ( K d) 测定煤油和各种盐水溶液 (HPIMP) 之间的差异。研究了不同参数的影响,即接触时间、有机相与水相 (O/A) 比、pH 值、萃取剂浓度和温度,以及阴离子对萃取回收过程的影响。实验结果表明,(HPIMP) 对 Cu(II) 离子的萃取能力取决于无机盐的性质。从 1 M 氯化物介质中获得的最大提取效率为 99.76%,明显高于从硫酸盐介质 ( E(%)  = 79.13%) 或混合氯化物/硫酸盐介质 ( E(%) = 81.75%)。提取常数值的趋势用酸度和 (HPIMP) 的分布常数来解释。从热力学分析推断,提取过程在高温下是吸热且有利的,从而产生稳定、可提取的 Cu-HPIMP 配合物。

更新日期:2021-09-16
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