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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/55629

    Título
    Pressurized liquid extraction optimization from supercritical defatted olive pomace: a green and selective phenolic extraction process
    Autor
    Katsinas, NicolaosAutoridad UVA
    Bento da Silva, Andreia
    Enriquez De Salamanca Aladro, AmaliaAutoridad UVA Orcid
    Fernández, Naiara
    Bronze, Maria Rosario
    Rodríguez Rojo, SorayaAutoridad UVA Orcid
    Año del Documento
    2021
    Editorial
    American Chemical Society
    Descripción
    Producción Científica
    Documento Fuente
    ACS Sustainable Chemistry and Engineering, 2021, Vol. 9, Nº. 16, págs. 5590–5602
    Resumen
    Olive pomace (OP) is the main by-product of the olive oil industry produced in large quantities. Its valorization as a source of phenolic bioactive compounds is paramount for the sustainable growth of related industries. This work proposes an intensified process to maximize the recovery of phenolic compounds in dry extracts using hydroalcoholic mixtures. Supercritical carbon dioxide defatting pre-treatment was performed. Following this, pressurized liquid extraction was optimized through a circumscribed central composite design. The factors consisted of temperature (65.0–185.0 °C), ethanol percentage (8.0–92.0%), and solid/liquid ratio (0.2–0.8 gOP/mLSOLVENT). Besides the total phenolic content (TPC) and the total flavonoid content (TFC), the major phenolic compounds of OP [hydroxytyrosol (HT), tyrosol (TY), and oleuropein (OL)] were evaluated. Further, decarboxymethyl OL aglycone dialdehyde (3,4-DHPEA-DEDA) was identified by HPLC-DAD-MS/MS as the most abundant polyphenol and was studied for the first time for OP. Different conditions were found to optimize each key compound. In 67% shorter extraction time and 38% less solvent consumption compared to conventional extraction, an increase of 475% for OL, 428% for HT, 194% for TY, 373% for 3,4-DHPEA-DEDA, 89% for TPC, and 158% for TFC was observed. The antioxidant activity by oxygen radical absorbance capacity (ORAC) assay increased 89% (optimal conditions) and correlated with TPC, 3,4-DHPEA-DEDA, and TFC. Thus, an efficient, selective, scalable, and green extraction process was established.
    Materias (normalizadas)
    Antioxidantes
    Compuestos aromáticos
    Extraction (Chemistry)
    Hydrocarbons
    Solvents
    Aceite de oliva
    Aceite de oliva - Análisis
    Palabras Clave
    Olive pomace
    Phenolic extracts
    ISSN
    2168-0485
    Revisión por pares
    SI
    DOI
    10.1021/acssuschemeng.0c09426
    Patrocinador
    European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Initial Training Network (ITN) “IT-DED3” (H2020-MSCA-ITN-2017) grant agreement No. 765608
    Fundação para a Ciência e Tecnologia (FCT) and Portugal 2020 to the Portuguese Mass Spectrometry Network (Rede Nacional de Espectrometria de Massa RNEM; LISBOA 01 0145 FEDER 402 022125)
    Patrocinador
    info:eu-repo/grantAgreement/EC/H2020/765608
    Version del Editor
    https://pubs.acs.org/doi/10.1021/acssuschemeng.0c09426#
    Propietario de los Derechos
    © 2021 The Authors
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/55629
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • IOBA - Artículos de revista [80]
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    Attribution-NonCommercial-NoDerivatives 4.0 InternacionalLa licencia del ítem se describe como Attribution-NonCommercial-NoDerivatives 4.0 Internacional

    Universidad de Valladolid

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