Journal
REACTIVE & FUNCTIONAL POLYMERS
Volume 62, Issue 2, Pages 129-139Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.reactfunctpolym.2004.11.003
Keywords
lignin; adsorption; lignocatechol; Pb(II); phase-separation process
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Crosslinked lignocatechol gel was prepared by immobilizing catechol onto wood lignin followed by crosslinking. The adsorption behavior of crosslinked lignocatechol was studied batchwise by varying different parameters like pH, initial concentration of metal ions and shaking time. Based on the results obtained in batchwise experiments, breakthrough profiles were examined using a column packed with crosslinked lignocatechol gel for the separation of small concentration of Pb(II) from an excess of Zn(II) followed by elution tests. Ten consecutive adsorption-elution cycles were conducted so as to check the stability and efficiency of the gel for recycling purpose. A constant efficiency was observed that reveals the feasibility of recycling of the gel. Cation exchange mechanism is postulated as the predominant process of the adsorption. (C) 2004 Elsevier B.V. All rights reserved.
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