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TitlePredicting dye biodegradation from redox potentials
Author(s)Zille, Andrea
Ramalho, Patrícia A.
Tzanov, Tzanko
Millward, Roy
Aires, Veronika
Cardoso, M. Helena
Ramalho, Maria Teresa
Gübitz, Georg M.
Paulo, Artur Cavaco
Issue date2004
PublisherAmerican Chemical Society
American Institute of Chemical Engineers
JournalBiotechnology Progress
Citation"Biotechno Prog." 20 (2004) 1588-1592.
Abstract(s)Two biological approaches for decolorization of azo sulfonated dyes have been compared: reductive decolorization with the ascomycete yeast Issatchenkia occidentalis and nzymatic oxidative decolorization with Trametes villosa laccase alone or in the presence of the mediator 1-hydroxybenzotriazole. The redox potential difference between the biological cofactor involved in the reductive activity of growing cells and the azo dye is a reliable indication for the decolorization ability of the biocatalyst. A linear relationship exists between the redox potential of the azo dyes and the decolorization efficiency of enzyme, enzyme/mediator, and yeast. The less positive the anodic peak of the dye, the more easily it is degraded oxidatevely with laccase. The more positive the cathodic peak of the dye, the more rapidly the dye molecule is reduced with yeast.
AccessOpen access
Appears in Collections:CDQuim - Artigos (Papers)
DBio - Artigos/Papers
DET/2C2T - Artigos em revistas internacionais com arbitragem científica

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