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Campo DC | Valor | Lengua/Idioma |
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dc.contributor.author | Marques, Gisela | - |
dc.contributor.author | Gamelas, José A. F. | - |
dc.contributor.author | Ruiz-Dueñas, F. J. | - |
dc.contributor.author | Río Andrade, José Carlos del | - |
dc.contributor.author | Evtuguin, Dmitry | - |
dc.contributor.author | Martínez, Ángel T. | - |
dc.contributor.author | Gutiérrez Suárez, Ana | - |
dc.date.accessioned | 2013-11-12T11:11:42Z | - |
dc.date.available | 2013-11-12T11:11:42Z | - |
dc.date.issued | 2011-08-16 | - |
dc.identifier.citation | Proceedings of the 11th European Workshop on Lignocelluilosics and Pulp, pp. 109-112. | es_ES |
dc.identifier.uri | http://hdl.handle.net/10261/86349 | - |
dc.description.abstract | The oxidation of manganese-substituted polyoxometalate [SiW11MnII(H2O)O39]6- (SiW11MnII) to active in selective kraft pulp delignification specie [SiW11MnIII(H2O)O39]5- (SiW11MnIII) by versatile peroxidase (VP) was studied. Releasing upon lignin oxidation SiW11MnII was quickly oxidized by VP even at room temperature in the presence of H2O2 (Km= 6.4±0.7 mM and kcat= 47±2 s-1). This allowed 95-100% reoxidation of reduced polyoxometalate with VP/H2O2 in the filtrate from eucalypt pulp delignification. In this way, it was possible to reuse the liquor from a SiW11MnIII/O2 stage for further delignification, in a sequence constituted by two polyoxometalate stages, with a short intermediate step consisting of the addition of VP/H2O2 to the filtrate for SiW11MnII reoxidation. When the first D stage of a conventional DEDED bleaching sequence was substituted by the two-stage delignification with polyoxometalate (POM) assisted by VP (POM-VP-POM), a 50% saving in ClO2 consumption was obtained for similar mechanical strength of the final pulp (89%ISO brightness). | es_ES |
dc.description.sponsorship | This study has been supported by the EU project BIORENEW (NMP2-CT-2006-026456) and the Spanish projects AGL2008-00709 and BIO2008-01533. We thank ENCE (Pontevedra, Spain) for pulp samples. G. M. and F. J. R.-D. thank the Spanish MICINN for a FPI fellowship and a Ramon y Cajal contract, respectively. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Johann-Heinrich von Thünen Medaille | es_ES |
dc.rights | openAccess | es_ES |
dc.subject | Kraft Pulp | es_ES |
dc.subject | Delignification | es_ES |
dc.subject | Polyoxometalate | es_ES |
dc.subject | Peroxidase | es_ES |
dc.title | Biomimetic delignification of kraft pulp employng polyoxometalate and versatile peroxidase | es_ES |
dc.type | comunicación de congreso | es_ES |
dc.description.peerreviewed | Peer reviewed | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_5794 | es_ES |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.grantfulltext | open | - |
item.openairetype | comunicación de congreso | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
Aparece en las colecciones: | (IRNAS) Comunicaciones congresos |
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POM-EWLP2010.pdf | 69,95 kB | Adobe PDF | Visualizar/Abrir |
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