A novel approach for the oxidative catalysis employing polyoxometalate-laccase system: application to the oxygen bleaching of kraft pulp
authors Tavares, APM; Gamelas, JAF; Gaspar, AR; Evtuguin, DV; Xavier, AMRB
nationality International
journal CATALYSIS COMMUNICATIONS
author keywords polyoxometalate; Keggin structure; laccase; oxygen delignification; bleaching; Kraft pulp
keywords LIGNIN MODEL COMPOUNDS; TRAMETES-VERSICOLOR; DELIGNIFICATION; 1-HYDROXYBENZOTRIAZOLE; HETEROPOLYANIONS; MEDIATORS
abstract A novel approach for the catalytic oxygen bleaching of kraft pulp using the heteropolyanion [SiW11MnIII(H2O)O-39](5-) (SiW11 Mn-III) and laccase of Trametes versicolor is proposed. The oxidation of the residual lignin in pulp with the heteropolyanion was followed by the catalyst re-oxidation by laccase in a separate stage. The alterative treatment in a multi-stage process with SiW11MnIII at 110 degreesC and with laccase at 45 degreesC allowed a sustainable eucalypt kraft pulp delignification with removal of about 50% of the residual lignin with minimal polysaccharides damage. Heteropolyanion maintained stable after redox turnovers during the treatments. (C) 2004 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 1566-7367
year published 2004
volume 5
issue 9
beginning page 485
ending page 489
digital object identifier (doi) 10.1016/j.catcom.2004.06.002
web of science category Chemistry, Physical
subject category Chemistry
unique article identifier WOS:000223629100003
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journal analysis (jcr 2019):
journal impact factor 3.612
5 year journal impact factor 3.458
category normalized journal impact factor percentile 60.692
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