Bioseparation of Pb(II) and Cd(II) from aqueous solution using cork waste biomass. Modeling and optimization of the parameters of the biosorption step
López-Mesas, Montserrat (Universitat Autònoma de Barcelona. Departament de Química)
Navarrete, Enrique Ruperto (Universitat Autònoma de Barcelona. Departament de Química)
Carrillo Navarrete, Fernando (Universitat Politècnica de Catalunya. Departament d'Enginyeria Química)
Palet i Ballús, Cristina (Universitat Autònoma de Barcelona. Departament de Química)

Date:	2011
Abstract:	In this work the ability of cork wastes to remove Cd(II) and Pb(II) from aqueous solutions has been studied. The kinetics of the biosorption system, the influence of the aqueous pH and the initial metal concentration on the metal uptake were investigated, showing a pH dependent profile. The maximum sorption for both metals was found at pH 5, independently that if the metals were in individual solutions or mixed. When a solution of the mixed metals were studied, a reduction in the Cd(II) uptake was observed showing a clear competition between the metals which was corroborated by the P-factor approach, behavior probably due to a lower attraction of this metal towards the corresponding active groups of the cork. Finally, the cork has been evaluated by FTIR and SEM in order to determine if the biosorption process modifies its chemical structure and morphology, respectively. Cork has been proved to be an efficient biomaterial useful for heavy metal separation purposes that is not altered by the process.
Grants:	Ministerio de Ciencia e Innovación CTQ2009-07432 Ministerio de Ciencia e Innovación CTQ2008-06633
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Biosorption ; Cork ; Heavy metals ; Isotherm ; Kinetic
Published in:	Chemical engineering journal (1996), Vol. 174, issue 1 (October 2011) , p. 9-17, ISSN 1873-3212

DOI: 10.1016/j.cej.2011.07.026

Postprint 22 p, 662.8 KB

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