Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/35109
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Paper pulp delignification using laccase and natural mediators |
Autor: | Camarero, Susana CSIC ORCID ; Ibarra, David CSIC ORCID; Martínez, Ángel T. CSIC ORCID ; Romero Sánchez, Javier; Gutiérrez Suárez, Ana CSIC ORCID ; Río Andrade, José Carlos del CSIC ORCID | Palabras clave: | Laccase Natural mediators Analytical pyrolysis Acetosyringone Syringaldehyde Paper pulp bleaching |
Fecha de publicación: | 2007 | Editor: | Elsevier | Citación: | Enzyme and Microbial Technology 40:1264-1271 (2007) | Resumen: | Three plant phenols, namely acetosyringone syringaldehyde and p-coumaric acid, were selected as laccase redox mediators to investigate the enzymatic delignification of paper pulp (obtained from kraft cooking of eucalypt wood) in combination with peroxide bleaching. The effects of these natural mediators were compared with those obtained using the synthetic mediator 1-hydroxybenzotriazole. p-Coumaric acid only caused minor increase of pulp brightness and did not lowered its kappa number (a rough estimation of the lignin content), whereas the use of acetosyringone or syringaldehyde as laccase mediators enabled over 15 % increase of final brightness and a similar decrease of final kappa number. Pulp delignification by laccase in the presence of the two latter natural mediators was demonstrated by analytical pyrolysis, which does not suffer from interferences by other pulp constituents as kappa number does, showing a preferential removal of lignin marker compounds compared with carbohydrate markers (up to 25% decrease of the corresponding ratio). This technique also revealed a modification of the residual lignin composition in terms of phenylpropane units after the laccase-mediator treatment. The use of laccase in combination with natural mediators, widely available from plant materials and pulping liquors, represents a promising alternative for environmentally-friendly delignification of paper pulp. | Descripción: | aCentro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain; bCentro de Investigación y Tecnología, ENCE, Carretera de Campañó, Ribeiro Vao, E-36157 Pontevedra, Spain; cInstituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, PO Box 1052,E-41080, Seville, Spain; E-mail address: ATMartinez@cib.csic.es (A.T. Martínez) | URI: | http://hdl.handle.net/10261/35109 | DOI: | 10.1016/j.enzmictec.2006.09.016 |
Aparece en las colecciones: | (IRNAS) Artículos (CIB) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
2007-Camarero-EMT-40-1264.pdf | 486 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
247
checked on 10-mar-2024
WEB OF SCIENCETM
Citations
212
checked on 28-feb-2024
Page view(s)
430
checked on 18-mar-2024
Download(s)
451
checked on 18-mar-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.