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Application of hydrophobic extractant in aqueous two-phase systems for selective extraction of cobalt, nickel and cadmium
- Source :
-
Journal of Chromatography A . Mar2013, Vol. 1279, p13-19. 7p. - Publication Year :
- 2013
-
Abstract
- Abstract: This work developed a new and efficient method of extracting and separating Co(II), Ni(II) and Cd(II) in aqueous two-phase systems (ATPS) composed of triblock copolymer (L64)+Na2C4H4O6 +water and L64+Li2SO4 +water using the hydrophobic extractant 1-nitroso-2-naphtol, which complexes the metal ions and partitions in the triblock copolymer micelles in the ATPS top phase. Metal extraction from the salt-rich phase to the copolymer – rich phase is strongly affected by the fine-tuning of the following parameters: amount of added extractant, type of electrolyte, pH, and tie-line length. Excellent separation factors (S i,j) between the metals were obtained at pH = 3.00 (S Co,Cd = 1550 and S Ni,Cd = 16,700) and pH = 1.00 (S Co,Ni = 826). In the interference study, Co(II) was selectivity extracted in the top phase in the presence of Ni(II) and Cd(II) in a concentration of up to 20 times the cobalt level in the system. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00219673
- Volume :
- 1279
- Database :
- Academic Search Index
- Journal :
- Journal of Chromatography A
- Publication Type :
- Academic Journal
- Accession number :
- 85419850
- Full Text :
- https://doi.org/10.1016/j.chroma.2013.01.003