Polymerization study of the aromatic amines generated by the biodegradation of azo dyes using the laccase enzyme

dc.creatorFranciscon, E
dc.creatorPiubeli, F
dc.creatorFantinatti-Garboggini, F
dc.creatorde Menezes, CR
dc.creatorSilva, IS
dc.creatorCavaco-Paulo, A
dc.creatorGrossman, MJ
dc.creatorDurrant, LR
dc.date2010
dc.dateAPR 5
dc.date2014-11-19T03:48:41Z
dc.date2015-11-26T17:01:27Z
dc.date2014-11-19T03:48:41Z
dc.date2015-11-26T17:01:27Z
dc.date.accessioned2018-03-28T23:49:17Z
dc.date.available2018-03-28T23:49:17Z
dc.identifierEnzyme And Microbial Technology. Elsevier Science Inc, v. 46, n. 5, n. 360, n. 365, 2010.
dc.identifier0141-0229
dc.identifierWOS:000275539400005
dc.identifier10.1016/j.enzmictec.2009.12.014
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/70704
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/70704
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/70704
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1278724
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFour different azo dyes were decolorized (color reduction >90%) by bacteria isolated from a textile wastewater effluent. Dye decolorizing was carried out under microaerobic conditions until completion, after which the aromatic amine concentration was determined. A laccase from Myceliophthora thermophila was used to catalyze coupling reactions of the aromatic amines produced from decolorizing the dyes. The reaction was carried out with stirring (100 rpm) in a weak acidic buffer solution (pH 5.0) at 45 degrees C for 3 days. The presence of aromatic amines in the samples after bacterial decolorizing confirmed the azo bond was reduced in the process. In addition, the UV-vis spectrum was shifted significantly after the sequential bacterial-laccase treatment also indicating a chemical transformation of the dyes. After laccase treatment the solutions formed colored soluble and precipitated products. The particles sizes making up the precipitates formed after laccase treatment varied between 105 and 483 nm as determined by Photon Correlation Spectroscopy (PCS). The laccase treatment also reduced the COD of the dye solutions by similar to 20%. We show that successive bacterial-laccase treatment is effective in decolorized azo dyes by reduction of the azo bonds, and promoting coupling reactions between the aromatic amines formed. Promoting coupling reactions between the aromatic amines using enzymes may prove useful for the physical removal and reuse of these amines. (C) 2010 Published by Elsevier Inc.
dc.description46
dc.description5
dc.description360
dc.description365
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherElsevier Science Inc
dc.publisherNew York
dc.publisherEUA
dc.relationEnzyme And Microbial Technology
dc.relationEnzyme Microb. Technol.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectAzo dyes
dc.subjectBiodegradation
dc.subjectBacteria
dc.subjectAromatic amines
dc.subjectPolymerization
dc.subjectLaccase
dc.subjectAnaerobic Reduction
dc.subjectCatalyzed Synthesis
dc.subjectHumic Substances
dc.subjectRedox Mediators
dc.subjectTextile Dyes
dc.subjectOrange-ii
dc.subjectDecolorization
dc.subjectDegradation
dc.subjectPolyaniline
dc.subjectDetoxification
dc.titlePolymerization study of the aromatic amines generated by the biodegradation of azo dyes using the laccase enzyme
dc.typeArtículos de revistas


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