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Mechanistic study of cobalt, nickel and copper transfer across a supported liquid membrane
Author(s) -
Marchese José,
Campderrosa Mercedes E.,
Acosta Adolfo
Publication year - 1993
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280570108
Subject(s) - permeation , phosphoric acid , copper , membrane , nickel , diffusion , mass transfer , cobalt , chemical engineering , chemistry , diffusion layer , aqueous solution , ion , inorganic chemistry , facilitated diffusion , layer (electronics) , mass transfer coefficient , analytical chemistry (journal) , materials science , chromatography , thermodynamics , organic chemistry , biochemistry , physics , engineering
The mechanism of cobalt, copper and nickel transport through supported liquid membranes containing di(2‐ethylhexyl)phosphoric acid as a mobile carrier has been studied. An equation describing the permeation rate has been derived, taking into account stagnant layer aqueous diffusion, interfacial resistance due to solvatation reaction and liquid membrane diffusion as simultaneous controlling factors. The validity of this model is evaluated with experimental data of mass transfer coefficient measured employing a permeation cell. For these ions it was found that at low stirring conditions the stagnant layer resistance mainly controlled the processes, but it is controlled by diffusion of the ion complex through the supported liquid membrane when the stagnant layer resistance is negligible.