Chemical, Thermal and Antioxidant Properties of Lignins Solubilized during Soda/AQ Pulping of Orange and Olive Tree Pruning Residues

Some agroforestry residues such as orange and olive tree pruning have been extensively evaluated for their valorization due to its high carbohydrates content. However, lignin-enriched residues generated during carbohydrates valorization are normally incinerated to produce energy. In order to find al...

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Autores: Eugenio, María E., Martín-Sampedro, Raquel, Santos, José I., Wicklein, Bernd, Ibarra, David
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/266516
Acceso en línea:http://hdl.handle.net/10261/266516
https://api.elsevier.com/content/abstract/scopus_id/85109132550
Access Level:acceso abierto
Palabra clave:Lignin antioxidant properties
Lignin purity and composition
Lignin structural characterization
Lignin thermal properties
Olive tree pruning
Orange tree pruning
Soda/AQ pulping
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spelling Chemical, Thermal and Antioxidant Properties of Lignins Solubilized during Soda/AQ Pulping of Orange and Olive Tree Pruning ResiduesEugenio, María E.Martín-Sampedro, RaquelSantos, José I.Wicklein, BerndIbarra, DavidLignin antioxidant propertiesLignin purity and compositionLignin structural characterizationLignin thermal propertiesOlive tree pruningOrange tree pruningSoda/AQ pulpingSome agroforestry residues such as orange and olive tree pruning have been extensively evaluated for their valorization due to its high carbohydrates content. However, lignin-enriched residues generated during carbohydrates valorization are normally incinerated to produce energy. In order to find alternative high added-value applications for these lignins, a depth characterization of them is required. In this study, lignins isolated from the black liquors produced during soda/anthraquinone (soda/AQ) pulping of orange and olive tree pruning residues were analyzed by analytical standard methods and Fourier-transform infrared spectroscopy (FTIR), nuclear magnetic resonance (solid state 13C NMR and 2D NMR) and size exclusion chromatography (SEC). Thermal analysis (thermogravimetric analysis (TGA), differential scanning calorimetry (DSC)) and antioxidant capacity (Trolox equivalent antioxidant capacity) were also evaluated. Both lignins showed a high OH phenolic content as consequence of a wide breakdown of β-aryl ether linkages. This extensive degradation yielded lignins with low molecular weights and polydispersity values. Moreover, both lignins exhibited an enrichment of syringyl units together with different native as well as soda/AQ lignin derived units. Based on these chemical properties, orange and olive lignins showed relatively high thermal stability and good antioxidant activities. These results make them potential additives to enhance the thermo-oxidation stability of synthetic polymers.Universidad de Jaén and Universidad de Córdoba are acknowledging for olive and orange tree pruning residues, respectively. The contribution of COST Action LignoCOST (CA17128), supported by COST (European Cooperation in Science and Technology), in promoting interaction, exchange of knowledge and collaborations in the field of lignin valorization is gratefully acknowledged.Peer reviewedMultidisciplinary Digital Publishing InstituteUniversidad de JaénUniversidad de Córdoba (España)European Cooperation in Science and TechnologyEugenio, María E. [0000-0003-4550-5400]Martín-Sampedro, Raquel [0000-0003-2083-3723]Santos, José I. [0000-0002-5199-2332]Wicklein, Bernd [0000-0002-1811-6736]Ibarra Trejo, David [0000-0003-3001-7308]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/266516https://api.elsevier.com/content/abstract/scopus_id/85109132550reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/European Cooperation in Science and Technology/LignoCOST (CA17128)/Molecules (Basel, Switzerland)https://doi.org/10.3390/molecules26133819Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2665162026-05-22T06:33:51Z
dc.title.none.fl_str_mv Chemical, Thermal and Antioxidant Properties of Lignins Solubilized during Soda/AQ Pulping of Orange and Olive Tree Pruning Residues
title Chemical, Thermal and Antioxidant Properties of Lignins Solubilized during Soda/AQ Pulping of Orange and Olive Tree Pruning Residues
spellingShingle Chemical, Thermal and Antioxidant Properties of Lignins Solubilized during Soda/AQ Pulping of Orange and Olive Tree Pruning Residues
Eugenio, María E.
Lignin antioxidant properties
Lignin purity and composition
Lignin structural characterization
Lignin thermal properties
Olive tree pruning
Orange tree pruning
Soda/AQ pulping
title_short Chemical, Thermal and Antioxidant Properties of Lignins Solubilized during Soda/AQ Pulping of Orange and Olive Tree Pruning Residues
title_full Chemical, Thermal and Antioxidant Properties of Lignins Solubilized during Soda/AQ Pulping of Orange and Olive Tree Pruning Residues
title_fullStr Chemical, Thermal and Antioxidant Properties of Lignins Solubilized during Soda/AQ Pulping of Orange and Olive Tree Pruning Residues
title_full_unstemmed Chemical, Thermal and Antioxidant Properties of Lignins Solubilized during Soda/AQ Pulping of Orange and Olive Tree Pruning Residues
title_sort Chemical, Thermal and Antioxidant Properties of Lignins Solubilized during Soda/AQ Pulping of Orange and Olive Tree Pruning Residues
dc.creator.none.fl_str_mv Eugenio, María E.
Martín-Sampedro, Raquel
Santos, José I.
Wicklein, Bernd
Ibarra, David
author Eugenio, María E.
author_facet Eugenio, María E.
Martín-Sampedro, Raquel
Santos, José I.
Wicklein, Bernd
Ibarra, David
author_role author
author2 Martín-Sampedro, Raquel
Santos, José I.
Wicklein, Bernd
Ibarra, David
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidad de Jaén
Universidad de Córdoba (España)
European Cooperation in Science and Technology
Eugenio, María E. [0000-0003-4550-5400]
Martín-Sampedro, Raquel [0000-0003-2083-3723]
Santos, José I. [0000-0002-5199-2332]
Wicklein, Bernd [0000-0002-1811-6736]
Ibarra Trejo, David [0000-0003-3001-7308]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Lignin antioxidant properties
Lignin purity and composition
Lignin structural characterization
Lignin thermal properties
Olive tree pruning
Orange tree pruning
Soda/AQ pulping
topic Lignin antioxidant properties
Lignin purity and composition
Lignin structural characterization
Lignin thermal properties
Olive tree pruning
Orange tree pruning
Soda/AQ pulping
description Some agroforestry residues such as orange and olive tree pruning have been extensively evaluated for their valorization due to its high carbohydrates content. However, lignin-enriched residues generated during carbohydrates valorization are normally incinerated to produce energy. In order to find alternative high added-value applications for these lignins, a depth characterization of them is required. In this study, lignins isolated from the black liquors produced during soda/anthraquinone (soda/AQ) pulping of orange and olive tree pruning residues were analyzed by analytical standard methods and Fourier-transform infrared spectroscopy (FTIR), nuclear magnetic resonance (solid state 13C NMR and 2D NMR) and size exclusion chromatography (SEC). Thermal analysis (thermogravimetric analysis (TGA), differential scanning calorimetry (DSC)) and antioxidant capacity (Trolox equivalent antioxidant capacity) were also evaluated. Both lignins showed a high OH phenolic content as consequence of a wide breakdown of β-aryl ether linkages. This extensive degradation yielded lignins with low molecular weights and polydispersity values. Moreover, both lignins exhibited an enrichment of syringyl units together with different native as well as soda/AQ lignin derived units. Based on these chemical properties, orange and olive lignins showed relatively high thermal stability and good antioxidant activities. These results make them potential additives to enhance the thermo-oxidation stability of synthetic polymers.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/266516
https://api.elsevier.com/content/abstract/scopus_id/85109132550
url http://hdl.handle.net/10261/266516
https://api.elsevier.com/content/abstract/scopus_id/85109132550
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/European Cooperation in Science and Technology/LignoCOST (CA17128)/
Molecules (Basel, Switzerland)
https://doi.org/10.3390/molecules26133819
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
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
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