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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3007
Title: Separation and removal of arsenic from metallurgical solutions using bis(2,4,4-trimethylpentyl)dithiophosphinic acid as extractant
Authors: Gupta B.
Begum I Z.
Published in: Separation and Purification Technology
Abstract: The present study aims to decontaminate arsenic from metallurgical processing solutions. The extraction profile of As(V)/(III) along with some associated metal ions like Se(IV), Ga(III), Sb(III), Bi(III), Ni(II), Cu(II), Hg(II) and Pb(II) in bis(2,4,4-trimethylpentyl)dithiophsophinic acid (Cyanex 301) has been investigated. As(V) remains unextracted whereas As(III) is quantitatively extracted into 0.1 mol L-1 Cyanex 301 by a solvating mechanism. The influence of various parameters, such as equilibration time, temperature, nature of diluent and mineral acid, concentration of hydrogen ion, chloride ion, metal ion and extractant on the distribution of As(III), was examined. The extracted species has been identified and loading capacity determined. The extractant has good hydrolytic stability and regeneration power, confirming its commercial viability. Conditions for the binary separation of arsenic from metal ions like Se(IV), Ga(III), Sb(III), Bi(III), Ni(II), Cu(II), Hg(II) and Pb(II) have been optimized. The proposed separation conditions were successfully applied to galena, copper pyrite and to a synthetic copper electrolyte bath solution. This resulted in the quantitative recovery of impurity-free Pb and Cu solutions. The developed procedure can be employed for the removal of impurities from metallurgical effluents before discharge. © 2008 Elsevier B.V. All rights reserved.
Citation: Separation and Purification Technology (2008), 63(1): 77-85
URI: https://doi.org/10.1016/j.seppur.2008.04.002
http://repository.iitr.ac.in/handle/123456789/3007
Issue Date: 2008
Keywords: Arsenic
Copper electrolyte bath solution
Copper pyrite
Cyanex 301
Galena
Liquid-liquid extraction
Separation
ISSN: 13835866
Author Scopus IDs: 7402195167
55665390800
Author Affiliations: Gupta, B., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Begum I, Z., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Funding Details: The authors are thankful to Cytec Canada Inc., Canada for the gift samples of Cyanex extractants and the Ministry of Human Resource Development (MHRD), New Delhi, India, for their financial support.
Corresponding Author: Gupta, B.; Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India; email: bvgcyfcy@iitr.ernet.in
Appears in Collections:Journal Publications [CY]

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