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Application of chitosan to cobalt recovery: Evaluation by factorial design of experiments
Author(s) -
Blazquez I.,
Vicente F.,
Gallo B.,
Ortiz I.,
Irabien A.
Publication year - 1987
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1987.070330622
Subject(s) - chitosan , cobalt , sorption , hydrometallurgy , factorial experiment , metal , chemistry , chemical engineering , chromatography , materials science , inorganic chemistry , adsorption , organic chemistry , mathematics , sulfuric acid , statistics , engineering
A natural polymer in a commercially available form (chitosan) has been tested using a factorial design of experiments for its application to cobalt recovery either in hydrometallurgy and in analytical separations. A simple mechanically stirred system has been used, evaluating the influence of the contact time, iron(II), cobalt (II), chitosan concentration, salinity, and pH in the separation. The pH value has a dramatic influence on the metal recovery from a negligible amount of metals at pH = 1.0 to a quantitative sorption at pH = 3.0. Linear relationships between sorbed metal and the variables have been determined at constant pH value and a quantitative evaluation of the metal recovery at different pH values can be performed using the maximum sorption capacity of the chitosan ( a 0 ) and the selectivity for both metals. The obtained results allow the evaluation of the recovery of metals using chitosan as solid phase.