Enhancement of TCF and ECF bleaching processes by urea and enzymatic pretreatments Optimization of a laccase-mediator pretreatment

A TCF bleaching sequence consisting of a urea pretreatment stage (U), laccase-mediator system stage (L), alkaline extraction stage (E), and hydrogen peroxide bleaching stage (P) was used to study the effect of five independent variables on the dependent variables pulp properties, hydrogen peroxide c...

ver descrição completa

Detalhes bibliográficos
Autores: García-Fuentevilla, Luisa, Martín-Sampedro, Raquel, Carbajo, J. M., Díaz, Manuel J., Eugenio, María E.
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/293594
Acesso em linha:http://hdl.handle.net/10261/293594
Access Level:acceso abierto
Palavra-chave:Pycnoporus sanguineus
Urea
Bleaching variables
Optimization
Eucalyptus globulus
Kraft pulp
id ES_732d93d944fee632cbbbc3ecc0603b46
oai_identifier_str oai:digital.csic.es:10261/293594
network_acronym_str ES
network_name_str España
repository_id_str
spelling Enhancement of TCF and ECF bleaching processes by urea and enzymatic pretreatments Optimization of a laccase-mediator pretreatmentGarcía-Fuentevilla, LuisaMartín-Sampedro, RaquelCarbajo, J. M.Díaz, Manuel J.Eugenio, María E.Pycnoporus sanguineusUreaBleaching variablesOptimizationEucalyptus globulusKraft pulpA TCF bleaching sequence consisting of a urea pretreatment stage (U), laccase-mediator system stage (L), alkaline extraction stage (E), and hydrogen peroxide bleaching stage (P) was used to study the effect of five independent variables on the dependent variables pulp properties, hydrogen peroxide consumption, and residual enzyme activity. Results showed that the most influential variable was L stage pulp consistency, followed by mediator and laccase dosages. On the other hand, oxygen pressure did not have a significant effect. The optimal UL partial sequence significantly enhanced the EP bleaching sequence 49.8% vs. 33.4% delignification, up to 65.6% ISO vs. 56.3% ISO bleached brightness, and 50.3% vs. 89.9% peroxide consumption in the P stage. The ULE partial sequence also improved an ECF bleaching sequence (ULED<inf>0</inf>E<inf>1</inf>D<inf>1</inf>) 0.6 vs. 1.0 final kappa number; 82.7% ISO vs. 76.0% ISO brightness; and 54.1 N·m·g-1 vs. 51.9 N·m·g-1 and 3.3 KPa·m2·g-1 vs. 2.7 KPa·m2·g-1, tensile and burst indexes, respectively, when compared to the control D<inf>0</inf>E<inf>1</inf>D<inf>1</inf> sequence.Peer reviewedNorth Carolina State UniversityGarcía-Fuentevilla, Luisa [0000-0001-8255-0097]Martín-Sampedro, Raquel [0000-0003-2083-3723]Eugenio, María E. [0000-0003-4550-5400]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/293594reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésInstituto de Ciencias Forestales (ICIFOR)Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2935942026-05-22T06:33:51Z
dc.title.none.fl_str_mv Enhancement of TCF and ECF bleaching processes by urea and enzymatic pretreatments Optimization of a laccase-mediator pretreatment
title Enhancement of TCF and ECF bleaching processes by urea and enzymatic pretreatments Optimization of a laccase-mediator pretreatment
spellingShingle Enhancement of TCF and ECF bleaching processes by urea and enzymatic pretreatments Optimization of a laccase-mediator pretreatment
García-Fuentevilla, Luisa
Pycnoporus sanguineus
Urea
Bleaching variables
Optimization
Eucalyptus globulus
Kraft pulp
title_short Enhancement of TCF and ECF bleaching processes by urea and enzymatic pretreatments Optimization of a laccase-mediator pretreatment
title_full Enhancement of TCF and ECF bleaching processes by urea and enzymatic pretreatments Optimization of a laccase-mediator pretreatment
title_fullStr Enhancement of TCF and ECF bleaching processes by urea and enzymatic pretreatments Optimization of a laccase-mediator pretreatment
title_full_unstemmed Enhancement of TCF and ECF bleaching processes by urea and enzymatic pretreatments Optimization of a laccase-mediator pretreatment
title_sort Enhancement of TCF and ECF bleaching processes by urea and enzymatic pretreatments Optimization of a laccase-mediator pretreatment
dc.creator.none.fl_str_mv García-Fuentevilla, Luisa
Martín-Sampedro, Raquel
Carbajo, J. M.
Díaz, Manuel J.
Eugenio, María E.
author García-Fuentevilla, Luisa
author_facet García-Fuentevilla, Luisa
Martín-Sampedro, Raquel
Carbajo, J. M.
Díaz, Manuel J.
Eugenio, María E.
author_role author
author2 Martín-Sampedro, Raquel
Carbajo, J. M.
Díaz, Manuel J.
Eugenio, María E.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv García-Fuentevilla, Luisa [0000-0001-8255-0097]
Martín-Sampedro, Raquel [0000-0003-2083-3723]
Eugenio, María E. [0000-0003-4550-5400]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Pycnoporus sanguineus
Urea
Bleaching variables
Optimization
Eucalyptus globulus
Kraft pulp
topic Pycnoporus sanguineus
Urea
Bleaching variables
Optimization
Eucalyptus globulus
Kraft pulp
description A TCF bleaching sequence consisting of a urea pretreatment stage (U), laccase-mediator system stage (L), alkaline extraction stage (E), and hydrogen peroxide bleaching stage (P) was used to study the effect of five independent variables on the dependent variables pulp properties, hydrogen peroxide consumption, and residual enzyme activity. Results showed that the most influential variable was L stage pulp consistency, followed by mediator and laccase dosages. On the other hand, oxygen pressure did not have a significant effect. The optimal UL partial sequence significantly enhanced the EP bleaching sequence 49.8% vs. 33.4% delignification, up to 65.6% ISO vs. 56.3% ISO bleached brightness, and 50.3% vs. 89.9% peroxide consumption in the P stage. The ULE partial sequence also improved an ECF bleaching sequence (ULED<inf>0</inf>E<inf>1</inf>D<inf>1</inf>) 0.6 vs. 1.0 final kappa number; 82.7% ISO vs. 76.0% ISO brightness; and 54.1 N·m·g-1 vs. 51.9 N·m·g-1 and 3.3 KPa·m2·g-1 vs. 2.7 KPa·m2·g-1, tensile and burst indexes, respectively, when compared to the control D<inf>0</inf>E<inf>1</inf>D<inf>1</inf> sequence.
publishDate 2015
dc.date.none.fl_str_mv 2015
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/293594
url http://hdl.handle.net/10261/293594
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Instituto de Ciencias Forestales (ICIFOR)
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv North Carolina State University
publisher.none.fl_str_mv North Carolina State University
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869410790208962560
score 15,811543

Registos relacionados