Adsorption of Cu(II) on porous chitosan membranes functionalized with histidine

The ability of chitosan to form complexes with bivalent metal ions has been broadly explored in the literature. The present work investigates the influence of functionalization of macroporous chitosan membranes with histidine on their ability to remove copper ions from aqueous solution in the range...

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Bibliographic Details
Published in:Journal of membrane science 2004-09, Vol.240 (1), p.227-235
Main Authors: Beppu, M.M, Arruda, E.J, Vieira, R.S, Santos, N.N
Format: Article
Language:English
Subjects:
Adsorption on membranes
Biopolymeric membranes
Membrane preparation and structure
Microporous and porous membranes
Water treatment
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Summary:The ability of chitosan to form complexes with bivalent metal ions has been broadly explored in the literature. The present work investigates the influence of functionalization of macroporous chitosan membranes with histidine on their ability to remove copper ions from aqueous solution in the range of pH 4–6. The maximum adsorption capacity for Cu(II) ion was 2.5 mmol metal/g pristine chitosan membranes. Under this condition, no influence of membrane porosity was observed. However, for membranes with immobilized histidine, the porosity was shown to be a factor that affects the maximum adsorption capacity, with values ranging from 2.0 to 3.0 mmol metal/g chitosan. These results indicate that the immobilization of histidine on porous chitosan membranes presents synergy with porosity in the ability to complex Cu(II) ions. This synergy may be negative or positive, depending on the initial membrane porosity.
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2004.04.025