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Type: Artigo de periódico
Title: Adsorption of Cu(II) on porous chitosan membranes functionalized with histidine
Author: Beppu, MM
Arruda, EJ
Vieira, RS
Santos, NN
Abstract: 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(11) 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. (C) 2004 Elsevier B.V. All rights reserved.
Subject: microporous and porous membranes
water treatment
membrane preparation and structure
adsorption on membranes
biopolymeric membranes
Country: Holanda
Editor: Elsevier Science Bv
Citation: Journal Of Membrane Science. Elsevier Science Bv, v. 240, n. 41671, n. 227, n. 235, 2004.
Rights: fechado
Identifier DOI: 10.1016/j.memsci.2004.04.025
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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