Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/5407

TitleEncapsulated pyridazine Cr(III) complexes prepared from biosorbents supported in zeolites
Author(s)Figueiredo, Hugo
Raposo, M. Manuela M.
Fonseca, A. Maurício C.
Neves, Isabel C.
Quintelas, C.
Tavares, M. T.
KeywordsZeolites
Arthrobacter viscosus
Biosorvents
Pyridazine Cr(III) complexes
Encapsulation
Issue date2005
PublisherElsevier
JournalStudies in Surface Science and Catalysis
CitationCEJKA, J. ; ZIKOVÁ, N. ; NACHTIGALL, P. eds. - "Studies in surface science and catalysis : molecular sieves from basic research to industrial applications". [S.l.] : Elsevier, 2005. p. 1073-1080.
Abstract(s)The encapsulation of a pyridazine Cr(III) complex was prepared from a robust biosorption system consisting of a bacterial biofilm supported on NaY or NaX zeolites. The maximum removal efficiency was 20% for Cr in both systems based in NaY or NaX. The bacterial biofilm, Arthrobacter viscosus, supported on the zeolite reduce Cr(VI) to Cr(III). The Cr(III) is retained in the zeolite by ion exchange. These occluded complexes were characterized by chemical analysis, spectroscopic methods (FTIR and UV/Vis) and surface analysis (DRX). The various techniques of characterization used show that the Cr(III) complex was effectively encapsulated in the zeolite and this process does not modified the morphology and structure of the NaY/NaX zeolites. These materials have potential applications in heterogeneous catalysis in mild conditions.
TypeConference paper
URIhttp://hdl.handle.net/1822/5407
ISBN0444520821
ISSN0167-2991
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CEB - Livros e Capítulos de Livros / Books and Book Chapters

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