Effect of aqueous extracts from Ceriporiopsis subvermispora-biotreated wood on the decolorization of Azure B by Fenton-like reactions

Autor(es)

Aguiar, Andre ^{[1, 2]} ; Ferraz, Andre ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Joao Del Rei, Dept Quim Biotecnol & Engn Bioproc, BR-36420000 Ouro Branco, MG - Brazil

^[2] Univ Sao Paulo, Dept Biotechnol, Escola Engn Lorena, BR-12602810 Lorena, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL BIODETERIORATION & BIODEGRADATION; v. 74, p. 61-66, 2012.
• Citações Web of Science: 11

Resumo

Aqueous extracts from wood biotreated with the white-rot fungus Ceriporiopsis subvermispora were evaluated for their Fe3+- and Cu2+-reducing activities and their anti- or prooxidant properties in Fenton-like reactions to decolorize the recalcitrant dye Azure B. The decolorization of Azure B was strongly inhibited in the presence of 10% (v/v) wood extracts. Only 0.1% (v/v)-diluted extracts provided some enhancement of the Azure B decolorization. The iron-containing reactions decolorized more Azure B and consumed substantially more H2O2 than the reactions containing copper. This study demonstrates that water-soluble wood phenols exert anti- or prooxidant effects that depend on their concentration in the reactions and on the type of cation, Fe3+ or Cu2+, used to convert H2O2 to OH radicals. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 03/04465-6 - Importância dos mediadores de baixa massa molar na biodegradação de madeira por Ceriporiopsis subvermispora
• Beneficiário: André Aguiar Mendes
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto