Use of cyclic voltammetry as an effective tool for selecting effcient enhancers for oxidative bioprocesses: importance of pH

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RECERCAT Home > Universitat Politècnica de Catalunya > Documents de recerca > View document

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dc.contributor	Universitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera
dc.contributor	Universitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.contributor	Universitat Politècnica de Catalunya. CIPAGRAF - Grup de Recerca Paperer i Gràfic
dc.contributor	Universitat Politècnica de Catalunya. GBMI - Grup de Biotecnologia Molecular i Industrial
dc.contributor.author	Aracri, Elisabetta
dc.contributor.author	Tzanov, Tzanko
dc.contributor.author	Vidal Lluciá, Teresa
dc.date	2013-01-04
dc.identifier.citation	Aracri, E.; Tzanov, T.; Vidal, T. Use of cyclic voltammetry as an effective tool for selecting effcient enhancers for oxidative bioprocesses: importance of pH. "Industrial & engineering chemistry research", 04 Gener 2013, vol. 52, p. 1455-1463.
dc.identifier.citation	0888-5885
dc.identifier.citation	10.1021/ie3027586
dc.identifier.uri	http://hdl.handle.net/2117/17932
dc.language.iso	eng
dc.publisher	American Chemical Society (ACS)
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Àrees temàtiques de la UPC::Enginyeria paperera::Pasta paperera::Blanqueig de pastes
dc.subject	Papermaking--Chemistry
dc.subject	Pulping
dc.subject	Wood-pulp Bleaching
dc.subject	Paper -- Blanqueig
dc.subject	Paper -- Fabricació -- Química
dc.title	Use of cyclic voltammetry as an effective tool for selecting effcient enhancers for oxidative bioprocesses: importance of pH
dc.type	info:eu-repo/semantics/publishedVersion
dc.type	info:eu-repo/semantics/article
dc.description.abstract	Seven natural phenols and two synthetic compounds were evaluated by means of cyclic voltammetry as enhancers for the oxidation of the lignin model compound veratryl alcohol (VAl) and a sulfonated lignin (SL). Their electrochemical behaviors and catalytic efficiencies (CEs) against both substrates were assessed as a function of pH. A general increase in CE of the phenols was for the first time observed in the oxidation of VAl at pH 7 and 8. Methyl syringate (MS), syringic acid (SRC), and syringaldehyde (SRD) exhibited the highest CEs against VAl among the studied phenolic compounds despite the reduced stabilities of their phenoxy radicals. This was a result of favorable stability−reactivity balances, which were apparently influenced by both the chemical structures of the enhancers and the experimental conditions. Violuric acid (VAc) proved the most efficient compound in oxidizing lignin, followed by SRD and MS, which showed regeneration in the interval of pHs studied

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