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Strategies for the purification of hydroxytyrosol-rich extracts obtained from exhausted olive pomace

dc.contributor.authorGómez-Cruz , Irene
dc.contributor.authorContreras Gámez , María del Mar
dc.contributor.authorRomero, Inmaculada
dc.contributor.authorRibeiro, Belina
dc.contributor.authorRoseiro, Luisa B.
dc.contributor.authorDuarte, Luis C.
dc.contributor.authorCarvalheiro, Florbela
dc.contributor.authorCastro , Eulogio
dc.date.accessioned2025-02-12T11:01:35Z
dc.date.available2025-02-12T11:01:35Z
dc.date.issued2023-11-15
dc.description.abstractExhausted olive pomace (EOP) is a residual biomass from which hydroxytyrosol can be recovered. This compound has applications in the food/pharma sectors, but its extraction yields complex extracts that require further purification for some applications. This work explores purification strategies based on membrane technology, liquid–liquid extraction (LLE), and solid-phase extraction with adsorbents and resins. The hydroxytyrosol content, phenolic profile, antioxidant activity, and inhibition of α-glucosidase and α-amylase were monitored. Hydroxytyrosol stood out in all purified extracts. The best hydroxytyrosol recovery (88.8%) was achieved using LLE with ethyl acetate as the extractant, while the purest extracts in phenolic compounds, including hydroxytyrosol, were obtained using the latter solvent and C18 (529 mg/g), DSC-8 (873 mg/g), and Purosorb PAD910 (523 mg/g). Conversely, mannitol and glucose, at high concentrations in the extract, were selectively retained in the aqueous phases. The developed strategies are discussed regarding their suitability to provide hydroxytyrosol-concentrated extracts, up to 291 mg/g, with antioxidant and antidiabetic functionalities
dc.description.sponsorshipThe Ministry of Science and Innovation (MCIN) of Spain for the Ramón y Cajal grant (RYC2020-030546-I/AEI/10.13039/501100011033) and the European Social Fund. The Universidad de Jaén grant POSDPP/2022 and the Ministry of Universities for the grant in the “Programme of Requalification of the Spanish University System” for the period 2021-2023 - Margarita Salas. The projects TED2021-132614A-I00 funded by MCIN/AEI/10.13039/501100011033 by the European Union NextGenerationEU/PRTR and PID2020-112594RB-C31 funded by MCIN/AEI/ 10.13039/501100011033 and by “ERDF A way of making Europe” are also appreciated. The technical and human support provided by CICT of the Universidad de Jaén is gratefully acknowledged. LNEG’s Bioenergy and Biorefinery Unit in the Biomass and Bioenergy Research Infrastructure (BBRI-LISBOA-01-0145-FEDER-022059) that is supported by the Operational Programme for Competitiveness and Internationalization (PORTUGAL2020), by Lisbon Portugal Regional Operational Programme (Lisboa 2020) and by North Portugal Regional Operational Programme (Norte 2020) under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (ERDF).
dc.identifier.citationGÓMEZ-CRUZ, I., Contreras, M.d.M., Romero, I., Ribeiro, B., Roseiro, L.B., Duarte, L.C., Carvalheiro, F., Castro, E., 2023. Strategies for the purification of hydroxytyrosol-rich extracts obtained from exhausted olive pomace. Separation and Purification Technology, 325, 124664. https://doi.org/10.1016/j.seppur.2023.124664.
dc.identifier.issn1383-5866
dc.identifier.other10.1016/j.seppur.2023.124664
dc.identifier.urihttps://doi.org/10.1016/j.seppur.2023.124664
dc.identifier.urihttps://hdl.handle.net/10953/4669
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofSeparation and Purification Technology [2023]; [325]:[124664]
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spainen
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectTECHNOLOGY::Chemical engineering
dc.titleStrategies for the purification of hydroxytyrosol-rich extracts obtained from exhausted olive pomace
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion

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