Development and characterization of natural deep eutectic solvents for optimized extraction of olive pomace phenolics

• Type: Article in International Scientific Journal
• Date: 2025

Authors

Soares, TF (Author) Other; Páscoa, RNMJ (Author) Other; Fonseca, J (Author) Other; Souto, EB (Author) Other; Beatriz B P P Oliveira (Author) FFUP; Alves, RC (Author) Other

Journal

Title: Food and Bioproducts Processing: Transactions of the Institution of of Chemical Engineers, Part C

Vol. 154

Pages: 295-306

ISSN: 0960-3085

Publisher: Institution of Chemical Engineers

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 1 Citation

Other information

Authenticus ID: P-01A-8G3

DOI: 10.1016/j.fbp.2025.10.002

Abstract (EN): The extraction of olive oil generates substantial amounts of by-products, accounting for approximately 80 % of the olive's weight. Olive pomace, a largely underutilized by-product of this process, holds significant potential as a source of bioactives for various applications. In order to improve their extraction, in this study, we explored different raw materials for the synthesis of Natural Deep Eutectic Solvents (NADES). A total of 16 different NADES were synthesized, using 8 distinct types of solvents and two water concentrations. These solvents were characterized regarding their physicochemical, spectroscopic, and thermal properties, and their extraction capacities were evaluated, alongside a cost analysis of their production. Differential scanning calorimetry (DSC) and Fourier-transform infrared (FTIR) spectroscopy analyses confirmed the formation of eutectic mixtures, which displayed a wide range of pH values (0.26-12.23), shear viscosities (7.06-492.30 mPa & sdot;s), but a low range of polarity. Sugar-based NADES were the most promising solvents for phenolic compounds extraction due to their low production cost; however, the NADES synthesized from choline chloride and urea exhibited the best extractive potential.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12