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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2985
Title: Solvent extraction studies on cadmium and zinc using Cyphos IL 102 and recovery of zinc from zinc-plating mud
Authors: Singh R.
Mahandra H.
Gupta B.
Published in: Hydrometallurgy
Abstract: In the present studies trihexyl(tetradecyl)phosphonium bromide (Cyphos IL 102) diluted in toluene has been employed as a novel reagent for the extraction and recovery of Cadmium(II) and Zinc(II) from hydrochloric acid medium. The influence of different parameters such as concentration of H+, extractant and chloride ion, nature of acid (HCl, H2SO4 and HNO3), diluent and equilibration time and temperature on the extraction of Cd(II) and Zn(II) have been investigated. The stoichiometry of extracted metal species examined by Cyphos IL 102 was found to be [(R3R′P)2 MCl2A2]org at low concentration of chloride ions < 10− 2 mol L− 1 for Cd(II) and < 1.5 mol L− 1 for Zn(II) where M2 + = Cd(II)/Zn(II) and R3R′P+ A− = Cyphos IL 102. The maximum loading capacity for Cd(II) and Zn(II) were 86.46 mg and 61.91 mg per gram of extractant, respectively. Efficient stripping of Cd(II) and Zn(II) from the loaded organic phase was achieved with 1.0 mol L− 1 HNO3. A series of successive extraction-stripping cycles with the extractant revealed good recyclability of the extractant. In addition to Cd(II) and Zn(II), the partition behaviour of other associated metal ions namely, Mn(II), Fe(II), Ni(II), Co(II) and Fe(III) from chloride medium at different acid molarity has been investigated. Binary separations of Cd(II) and Zn(II) from each other and other associated metal ions have been achieved using 3.0 × 10− 3 mol L− 1 Cyphos IL 102. Based on the extraction data a separation scheme was designed and applied to a synthetic mixture. The developed separation scheme was successfully applied to zinc plating mud for the recovery of Zn(II). Zn(II) was quantitatively (96.64%) recovered with a purity > 99.00%. © 2017 Elsevier B.V.
Citation: Hydrometallurgy (2017), 172(): 11-18
URI: https://doi.org/10.1016/j.hydromet.2017.06.017
http://repository.iitr.ac.in/handle/123456789/2985
Issue Date: 2017
Publisher: Elsevier B.V.
Keywords: Cadmium
Cyphos IL 102
Recovery
Solvent extraction
Zinc
Zn-plating mud
ISSN: 0304386X
Author Scopus IDs: 55496956600
56193939400
7402195167
Author Affiliations: Singh, R., Analytical Lab A-214, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247 667, India
Mahandra, H., Analytical Lab A-214, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247 667, India
Gupta, B., Analytical Lab A-214, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247 667, India
Funding Details: We thank Cytec industries Inc., Netherlands, for gifting the Cyphos IL 102. The financial support to one of the authors by Council of Scientific and Industrial Research (CSIR), New Delhi (Grant No.09/143(0830)/2013-EMR-I), India is gratefully acknowledged.
Corresponding Author: Gupta, B.; Analytical Lab A-214, Department of Chemistry, Indian Institute of Technology RoorkeeIndia; email: dr.binagupta@gmail.com
Appears in Collections:Journal Publications [CY]

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