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https://locus.ufv.br//handle/123456789/19402
Tipo: | Artigo |
Título: | Application of hydrophobic extractant in aqueous two-phase systems for selective extraction of cobalt, nickel and cadmium |
Autor(es): | Rodrigues, Guilherme Dias Lemos, Leandro Rodrigues de Silva, Luis Henrique Mendes da Silva, Maria C. Hespanhol da |
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 (Si,j) between the metals were obtained at pH = 3.00 (SCo,Cd = 1550 and SNi,Cd = 16,700) and pH = 1.00 (SCo,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. |
Palavras-chave: | Cobalt Nickel Cadmium Aqueous two-phase system Hydrophobic extractant |
Editor: | Journal of Chromatography A |
Tipo de Acesso: | Published by Elsevier B.V. |
URI: | https://doi.org/10.1016/j.chroma.2013.01.003 http://www.locus.ufv.br/handle/123456789/19402 |
Data do documento: | 1-Mar-2013 |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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artigo.pdf Until 2100-12-31 | texto completo | 418,12 kB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
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