Logo do repositório
 
Publicação

Recovery of oils and antioxidants from olive stones

2022-11Artigo científico Acesso aberto
Ver registo simples
dc.contributor.authorOsei, Joseph B.D.
dc.contributor.authorAmiri, Amirpiran
dc.contributor.authorWang, Jiawei
dc.contributor.authorTavares, Marcia T.
dc.contributor.authorKiatkittipong, Worapon
dc.contributor.authorNajdanovic-Visak, Vesna
dc.contributor.institutionDQ - Departamento de Química
dc.contributor.institutionLAQV@REQUIMTE
dc.contributor.pblElsevier Science B.V., Amsterdam.
dc.date.accessioned2023-03-14T22:44:22Z
dc.date.available2023-03-14T22:44:22Z
dc.date.issued2022-11
dc.descriptionFunding Information: This work was supported by the Engineering and Physical Sciences Research Council – Impact Acceleration Account. Publisher Copyright: © 2022 Elsevier Ltd
dc.description.abstractThe olive oil industry generates enormous amounts of olive stones each year, which have the potential to be used as a biofuel but have high oil content, which negatively impacts the combustion process. In addition, olive stones contain high-value antioxidants, and their exploitation can provide additional revenues for the biofuel industry. In this work, we report the effect of different extraction solvents on the extraction of antioxidants and their activity. In addition, in vitro gastrointestinal digestion was used to evaluate the content and antioxidant activity of the olive stone extracts after gastrointestinal digestion. The extracts obtained by aqueous ethanol solvent (50% vol) exhibited the highest antioxidant activity with the DPPH IC50 of 1.27 mg mL−1 and ferric reducing antioxidant power (FRAP) of 6.33 mg AAE g−1. After in vitro digestion composed of gastric and intestinal processes, the antioxidant activity of olive stones decreased: DPPH IC50 value increased three times (a higher value of IC50 indicates lower antioxidant activity) and FRAP decreased almost five times with respect to the values obtained for original extracts. Furthermore, both phenomenological and shrinking core models were used to fit experimental oil extraction kinetics data and showed good agreement. Thermodynamic analysis showed that the extraction process is endothermic and irreversible while spontaneous and thermodynamically favourable for all conditions except for oil extraction from olive stones of 3.10 mm particle size at 20 °C. The calculated value for temperature coefficient is in good agreement with the previously reported values for the oil extraction from similar biomass.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent11
dc.format.extent1758799
dc.identifier.doi10.1016/j.biombioe.2022.106623
dc.identifier.issn0961-9534
dc.identifier.otherPURE: 55703677
dc.identifier.otherPURE UUID: ef24e349-28df-42c8-9139-40170e4510b0
dc.identifier.otherScopus: 85140248762
dc.identifier.otherWOS: 000933299000004
dc.identifier.urihttp://hdl.handle.net/10362/150572
dc.identifier.urlhttps://www.scopus.com/pages/publications/85140248762
dc.language.isoeng
dc.peerreviewedyes
dc.subjectAntioxidants
dc.subjectGastrointestinal digestion
dc.subjectKinetics of oil extraction
dc.subjectOlive stones
dc.subjectSolvent extraction
dc.subjectThermodynamics of oil extraction
dc.subjectForestry
dc.subjectRenewable Energy, Sustainability and the Environment
dc.subjectAgronomy and Crop Science
dc.subjectWaste Management and Disposal
dc.subjectSDG 7 - Affordable and Clean Energy
dc.titleRecovery of oils and antioxidants from olive stonesen
dc.typejournal article
degois.publication.titleBiomass and Bioenergy
degois.publication.volume166
dspace.entity.typePublication
rcaap.rightsopenAccess

Ficheiros

Principais
A mostrar 1 - 1 de 1
Miniatura
Nome:
Recovery_of_oils_and_antioxidants_from_olive_stones.pdf
Tamanho:
1.68 MB
Formato:
Adobe Portable Document Format
Ver/Abrir

Coleções

FCT: DQ - Artigos em revista internacional com arbitragem científica