Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/9443

TitleRemoval of Cd(II), Cr(VI), Fe(III) and Ni(II) from aqueous solutions by an E. coli biofilm supported on kaolin
Author(s)Quintelas, C.
Rocha, Zélia
Silva, Bruna Andreia Nogueira Airosa
Fonseca, Bruna
Figueiredo, Hugo
Tavares, M. T.
KeywordsBiofilm
Biosorption
Cadmium
Chromium
Iron
Kaolin
Nickel
Issue dateJul-2009
PublisherElsevier
JournalChemical Engineering Journal
Citation"Chemical Engineering Journal". ISSN 1385-8947. 149: 1-3 (July 2009) 319-324.
Abstract(s)The pollution caused by heavy metals is one of the major environmental problems that is imperative to be solved. New technologies, easy to implement and to adapt to any system, deserve special attention and are a focus of this work. The ability of a biofilm of Escherichia coli supported on kaolin to remove Cr(VI), Cd(II), Fe(III) and Ni(II) from aqueous solutions was investigated in batch assays for the treatment of diluted aqueous solutions. The biosorption performance, in terms of uptake, followed the sequence: Fe(III) > Cd(II) > Ni(II) > Cr(VI). The equilibrium data in batch systems were described by Langmuir, Sips and Redlich–Peterson model isotherms. The best fit for chromium and nickel was obtained with the Redlich–Peterson model and for cadmium the best fit was obtained with the Sips model. The presence of functional groups on the cell wall surface of the biomass that may interact with the metal ion was confirmed by FTIR. Kaolin samples have been fully characterized by chemical analyses. The results obtained are very promising for the removal of metal ions from effluents.
TypeArticle
URIhttp://hdl.handle.net/1822/9443
DOI10.1016/j.cej.2008.11.025
ISSN1385-8947
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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