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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/6084

    Título
    Valorization of olive mill solid residue through ultrasound-assisted extraction and phenolics recovery by adsorption process
    Autor
    Niknam, S. Mehdi
    Kashaninejad, Mansoore
    Escudero Barbero, IsabelAutoridad UBU Orcid
    Sanz Díez, Mª TeresaAutoridad UBU Orcid
    Beltrán Calvo, SagrarioAutoridad UBU Orcid
    Benito Moreno, José ManuelAutoridad UBU Orcid
    Publicado en
    Journal of Cleaner Production. 2021, V. 316, 128340
    Editorial
    Elsevier
    Fecha de publicación
    2021-09
    ISSN
    0959-6526
    DOI
    10.1016/j.jclepro.2021.128340
    Résumé
    Olive pomace, a solid residue generated during olive oil production process and a rich source of phenolic compounds, was dried and defatted to obtain a pomace oil rich in monounsaturated fatty acids with 64% oleic acid. The defatted pomace was further treated by ultrasound-assisted extraction (UAE). The optimal phenol extraction conditions of 10 min, 40% amplitude and 4% (w/v) solid:solvent ratio, yielded to 14.70 mg/g total phenols, 2.48 mg/g total flavonoids and 0.924 mmol Trolox/g antioxidant activity. In order to purify valuable biophenols, two polymeric resins (XAD4 and XAD16) and two activated charcoals (NPAC and GAC) were tested as adsorbents using a magnetic stirrer and an incubator shaker. XAD16 (100 g/L) in magnetic stirrer showed the optimal adsorption ratios with 74.36%, 39.25%, 68.79% and 100% for total phenols, hydroxytyrosol, tyrosol and oleuropein, respectively. Desorption using acidified 50% (v/v) ethanol-water at pH = 2.3 proved 57.65% recovery of total phenols, 19.27% of hydroxytyrosol and 45.73% of tyrosol. These results indicate that extraction and selective purification of biophenols from olive pomace can be achieved by the proposed UAE using 50% v/v ethanol-water as solvent, followed by adsorption-desorption stages with the XAD16 polymeric resin.
    Palabras clave
    Olive pomace
    Ultrasound-assisted extraction
    Response surface methodology
    Phenolics adsorption-desorption
    Materia
    Ingeniería química
    Chemical engineering
    URI
    http://hdl.handle.net/10259/6084
    Versión del editor
    https://doi.org/10.1016/j.jclepro.2021.128340
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    Niknam-jcp_2021.pdf
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    2.107Mo
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