Evaluation and optimization of mixed-micelle mediated cloud point extraction of nickel(II) from concentrated chloride medium with Triton X-114-amphiphilic Schiff bases

The extraction properties of original mixed micellar systems, Triton X-114/N-alkylsalicylideneimine type amphiphilic Schiff bases, have been investigated for removal of nickel(II) from aqueous solutions. The acid-base behavior of chelating Schiff bases in aqueous micellar solution was first studied,...

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Published inSeparation science and technology Vol. 56; no. 14; pp. 2407 - 2425
Main Authors Benabdallah, Nabil, Hadj Youcef, Mohammed, Reffas, Hasnia, Bendraoua, Abdelaziz
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 22.09.2021
Taylor & Francis Ltd
Subjects
Acidity
amphiphilic Schiff bases
Aqueous solutions
Chelation
Chlorides
Cloud point extraction
Constants
Imines
Micelles
mixed micelles
Nickel
nickel(II)
Optimization
Phase diagrams
Stoichiometry
Triton X-114
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Summary:The extraction properties of original mixed micellar systems, Triton X-114/N-alkylsalicylideneimine type amphiphilic Schiff bases, have been investigated for removal of nickel(II) from aqueous solutions. The acid-base behavior of chelating Schiff bases in aqueous micellar solution was first studied, and their acidity constants were determined. The phase diagram of Triton X-114/water micellar system was then established, The cloud point extraction of nickel(II) by mixed micelles Triton X-114/amphiphilic Schiff base ligand was studied in a concentrated chloride medium, as function of pH, extractant and surfactant concentrations, temperature and time. The stoichiometry of the extracted Ni(II)-complexes was finally determined.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2020.1826524