dc.contributor
Universitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera
dc.contributor
Universitat Politècnica de Catalunya. CELBIOTECH - Grup de Recerca: Enginyeria Paperera
dc.contributor.author
Valls Vidal, Cristina
dc.contributor.author
Vidal Lluciá, Teresa
dc.contributor.author
Roncero Vivero, María Blanca
dc.identifier
Valls, C.; Vidal, T.; Roncero, M. Enzymatic strategies to improve removal of hexenuronic acids and lignin from cellulosic fibers. "Holzforschung", 2014, vol. 68, núm. 2, p. 229-237.
dc.identifier
https://hdl.handle.net/2117/21412
dc.identifier
10.1515/hf-2013-0033
dc.description.abstract
Different enzymatic strategies were applied to improve lignin and hexenuronic acid (HexA) removal. Three laccases (L) with different redox potentials were applied in combination with 1-hydroxybenzotriazole or methyl syringate to softwood sulfite and hardwood kraft fibers. The enzymes with a high-redox potential from Pycnoporus cinnabarinus and Trametes villosa were found to be the most efficient. The bleaching efficiency was not significantly influenced by the presence or absence of HexA in the different types of lignocellulosic fibers.Subsequently, the lignin or HexA removal in the presence of different mediators was evaluated in eucalyptus fibers with the T. villosa laccase (TvL). Natural mediators removed only lignin, whereas the combinations of TvL with synthetic mediators removed both HexA and lignin. The mediator violuric acid (VA) was the most efficient as judged by the properties of fiber and effluent. A xylanase pretreatment stage was found to boost the access of the LVA system to HexA without affecting lignin in the pulp
dc.description.abstract
Postprint (published version)
dc.format
application/pdf
dc.rights
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights
Restricted access - publisher's policy
dc.rights
Attribution-NonCommercial-NoDerivs 3.0 Spain
dc.subject
Àrees temàtiques de la UPC::Enginyeria paperera::Pasta paperera
dc.subject
Àrees temàtiques de la UPC::Enginyeria paperera::Primeres matèries papereres::Cel·lulosa
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Sulfate pulping process
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Lignocellulose
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Sulfite pulping process
dc.subject
hexenuronic acid
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laccase-mediator
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Cel·lulosa per a paper
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Lignocel·lulosa
dc.subject
Fusta -- Química
dc.title
Enzymatic strategies to improve removal of hexenuronic acids and lignin from cellulosic fibers
