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Separation of cobalt(II) from nickel(II) by solid-phase extraction into Aliquat 336 chloride immobilized in poly(vinyl chloride)

Blitz-Raith, Alexandra H and Paimin, Rohani and Cattrall, Robert W and Kolev, Spas D (2007) Separation of cobalt(II) from nickel(II) by solid-phase extraction into Aliquat 336 chloride immobilized in poly(vinyl chloride). Talanta, 71 (1). pp. 419-423. ISSN 0039-9140

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Abstract

A solid-phase absorbent obtained by the immobilization of Aliquat 336 chloride in poly(vinyl chloride) is reported to extract preferentially Co(II) from its 7 M hydrochloric acid solutions containing Ni(II). Under the experimental conditions there was no extraction of Ni(II) which allowed the complete separation of these two ions. Co(II) was rapidly and quantitatively back-extracted with deionised water. A mechanism for the extraction of Co(II) is proposed based on the formation of the ion-pair A+[HCoCl4]− where A+ is the Aliquat 336 cation. Fe(III) and Cd(II), usually present in Co(II) and Ni(II) samples, were also extracted into the solid-phase absorbent though at a slower rate than Co(II) and they did not interfere with the separation of Co(II) from Ni(II). It was also demonstrated that this approach allowed the complete separation of Ni(II) from the other metal ions mentioned above.

Item Type: Article
Uncontrolled Keywords: ResPubID16376, solid-phase extraction, polymer inclusion membranes, aliquat 336 chloride, separation of cobalt(ii) from nickel(ii)
Subjects: FOR Classification > 0302 Inorganic Chemistry
Faculty/School/Research Centre/Department > School of Engineering and Science
FOR Classification > 0301 Analytical Chemistry
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Depositing User: VUIR
Date Deposited: 30 Aug 2011 04:14
Last Modified: 30 Aug 2011 04:14
URI: http://vuir.vu.edu.au/id/eprint/3190
DOI: 10.1016/j.talanta.2006.04.017
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Citations in Scopus: 25 - View on Scopus

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