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
|