title: Green ultrasound-assisted extraction of carotenoids from pomegranate wastes using vegetable oils.
abstract: The objective of this work was to develop a new process for pomegranate peels application in food industries based on ultrasound-assisted extraction of carotenoids using different vegetable oils as solvents. In this way, an oil enriched with antioxidants is produced. Sunflower oil and soy oil were used as alternative solvents and the effects of various parameters on extraction yield were studied. Extraction temperature, solid/oil ratio, amplitude level, and extraction time were the factors investigated with respect to extraction yield. Comparative studies between ultrasound-assisted and conventional solvent extraction were carried out in terms of processing procedure and total carotenoids content. The efficient extraction period for achieving maximum yield of pomegranate peel carotenoids was about 30min. The optimum operating conditions were found to be: extraction temperature, 51.5°C; peels/solvent ratio, 0.10; amplitude level, 58.8%; solvent, sunflower oil. A second-order kinetic model was successfully developed for describing the mechanism of ultrasound extraction under different processing parameters.
authors: Department of Food Science and Technology, School of Agriculture, Forestry and Natural Environment, Aristotle University, 541 24 Thessaloniki, Greece. Electronic address: athgou@agro.auth.gr.
authors: Athanasia M
authors: AM
authors: Goula
authors: Department of Food Science and Technology, School of Agriculture, Forestry and Natural Environment, Aristotle University, 541 24 Thessaloniki, Greece.
authors: Maria
authors: M
authors: Ververi
authors: Department of Food Science and Technology, School of Agriculture, Forestry and Natural Environment, Aristotle University, 541 24 Thessaloniki, Greece.
authors: Anna
authors: A
authors: Adamopoulou
authors: Department of Food Science and Technology, School of Agriculture, Forestry and Natural Environment, Aristotle University, 541 24 Thessaloniki, Greece.
authors: Kyriakos
authors: K
authors: Kaderides
mesh_terms: D002338:Carotenoids / Q000032:analysis / Q000302:isolation & purification*; D005591:Chemical Fractionation / Q000379:methods*; D055772:Green Chemistry Technology; D007700:Kinetics; D029561:Lythraceae / Q000737:chemistry*; D010938:Plant Oils / Q000737:chemistry*; D000069453:Ultrasonic Waves; D014866:Waste Products
chemical_list: D010938:Plant Oils; D014866:Waste Products; D002338:Carotenoids
keywords: Carotenoids; Green extraction; Green solvent; Pomegranate peel; Ultrasound extraction