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TitleDecolorization of the phthalocyanine dye reactive blue 21 by turnip peroxidase and assessment of its oxidation products
Author(s)Silva, Maria Cristina
Corrêa, Angelita D.
Amorim, M. T. Pessoa de
Parpot, Pier
Torres, Juliana A.
Chagas, Pricila Maria Batista
KeywordsEnvironmental biocatalysis
Turnip peroxidase
Textile dyes
Issue date2012
JournalJournal of Molecular Catalysis B: Enzymatic
Abstract(s)Peroxidases can be used in decolorization processes and the treatment of textiles effluents. This study evaluates the potential of the turnip peroxidase enzyme in the decolorization of the phthalocyanine textile dye Reactive Blue 21 (RB21). Some factors such as pH, the amount of H2O2 and the enzyme were evaluated in order to determine the optimum conditions for the enzyme performance. The reaction products formed during the decolorization of the RB21 dye were analyzed by high-performance liquid chromatography–mass spectrometry coupling (LC–ESI/MS). LC–ESI/MS analysis showed that the decolorization of the dye RB21 by turnip peroxidase is due to the breaking up of the chromatogenous system. The tests for toxicity towards lettuce seeds showed an increase of the toxicity after enzymatic treatment of the dye. This study verifies the viability of the use of the turnip peroxidase enzyme in the biodegradation of textile dyes.
AccessOpen access
Appears in Collections:DET/2C2T - Artigos em revistas internacionais com arbitragem científica

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