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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2988
Title: Liquid-liquid extraction studies on Zn(II) and Cd(II) using phosphonium ionic liquid (Cyphos IL 104) and recovery of zinc from zinc plating mud
Authors: Mahandra H.
Singh R.
Gupta B.
Published in: Separation and Purification Technology
Abstract: The present study describes partition behavior of Zn(II) and Cd(II) from acidic chloride medium using Cyphos IL 104 [trihexyl(tetradecyl)phosphonium bis 2,4,4-(trimethylpentyl)phosphinate] diluted in toluene. Factors affecting the extraction such as concentration of extractant and H+, nature of diluent, equilibration time and temperature have been evaluated. Loading and regeneration capacity along with the stability of extractant have also been assessed. The data obtained have been used to determine the stoichiometry of the extracted complex that was found to be 1:2 i.e., two moles of extractant per mole of Zn(II)/Cd(II). Effect of temperature on distribution suggested the process to be exothermic and spontaneous with ΔG° values of −39.63 ± 4.27 kJ/mol and −65.91 ± 0.4 kJ/mol for zinc and cadmium, respectively. The extraction behavior of associated metal ions namely Cu(II), Ni(II), Co(II), Fe(II)/(III) and Mn(II) has been studied and conditions for their separation from zinc and cadmium have been optimized. Based on the extraction data a separation scheme was designed and applied to a synthetic multi element mixture for the recovery of zinc and cadmium. The potential of the extractant for the recovery of zinc from zinc plating mud is assessed. © 2016
Citation: Separation and Purification Technology (2017), 177(): 281-292
URI: https://doi.org/10.1016/j.seppur.2016.12.035
http://repository.iitr.ac.in/handle/123456789/2988
Issue Date: 2017
Publisher: Elsevier B.V.
Keywords: Cadmium
Cyphos IL 104
Plating mud
Recovery
Separation
Zinc
ISSN: 13835866
Author Scopus IDs: 56193939400
55496956600
7402195167
Author Affiliations: Mahandra, H., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, U.K. 247667, India
Singh, R., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, U.K. 247667, India
Gupta, B., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, U.K. 247667, India
Corresponding Author: Gupta, B.; Department of Chemistry, Indian Institute of Technology RoorkeeIndia; email: dr.binagupta@gmail.com
Appears in Collections:Journal Publications [CY]

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