RT info:eu-repo/semantics/article
T1 Valorization of olive mill solid residue through ultrasound-assisted extraction and phenolics recovery by adsorption process
A1 Niknam, S. Mehdi
A1 Kashaninejad, Mansoore
A1 Escudero Barbero, Isabel
A1 Sanz Díez, Mª Teresa
A1 Beltrán Calvo, Sagrario
A1 Benito Moreno, José Manuel
K1 Olive pomace
K1 Ultrasound-assisted extraction
K1 Response surface methodology
K1 Phenolics adsorption-desorption
K1 Ingeniería química
K1 Chemical engineering
AB Olive pomace, a solid residue generated during olive oil production process and a rich source of phenoliccompounds, was dried and defatted to obtain a pomace oil rich in monounsaturated fatty acids with 64% oleicacid. The defatted pomace was further treated by ultrasound-assisted extraction (UAE). The optimal phenolextraction conditions of 10 min, 40% amplitude and 4% (w/v) solid:solvent ratio, yielded to 14.70 mg/g totalphenols, 2.48 mg/g total flavonoids and 0.924 mmol Trolox/g antioxidant activity. In order to purify valuablebiophenols, two polymeric resins (XAD4 and XAD16) and two activated charcoals (NPAC and GAC) were testedas adsorbents using a magnetic stirrer and an incubator shaker. XAD16 (100 g/L) in magnetic stirrer showed theoptimal adsorption ratios with 74.36%, 39.25%, 68.79% and 100% for total phenols, hydroxytyrosol, tyrosol andoleuropein, respectively. Desorption using acidified 50% (v/v) ethanol-water at pH = 2.3 proved 57.65% recoveryof total phenols, 19.27% of hydroxytyrosol and 45.73% of tyrosol. These results indicate that extractionand selective purification of biophenols from olive pomace can be achieved by the proposed UAE using 50% v/vethanol-water as solvent, followed by adsorption-desorption stages with the XAD16 polymeric resin.
PB Elsevier
SN 0959-6526
YR 2021
FD 2021-09
LK http://hdl.handle.net/10259/6084
UL http://hdl.handle.net/10259/6084
LA eng
NO Spanish Agencia Estatal de Investigación [grant number PID2019-104950RB-I00/AEI/10.13039/ 501100011033] and the Junta de Castilla y León (JCyL) and the European Regional Development Fund (ERDF) [grant numbers BU301P18 and BU050P20].
DS Repositorio Institucional de la Universidad de Burgos
RD 23-nov-2024