Green Strategies for Recovery of Bioactive Phenolic Compounds from Agro-Industrial Wastes (Pomegranate Peels, Almond Hulls, and Elderberry Pomace) Using Natural Deep Eutectic Solvents

Author(s)

Bertolo, Mirella R. V. ; Bogusz Junior, Stanislau ; Mitchell, Alyson E.

• Document type: Journal article
• Source: ACS FOOD SCIENCE & TECHNOLOGY; v. 3, n. 12, p. 13-pg., 2023-11-17.

Abstract

Natural deep eutectic solvents (NADES) based on choline chloride and organic acids were applied for the recovery of phenolic compounds from three agro-industrial residues: pomegranate peels, almond hulls, and elderberry pomace. Box-Behnken designs were conducted to reach the best extraction conditions, which were 50 degrees C, 20 min, and 20 w/w NADES/solid for pomegranate peels, 30 degrees C, 60 min, and 20 w/w NADES/solid for almond hulls, and 40 degrees C, 60 min, and 30 w/w NADES/solid for elderberry pomace. Punicalagin was the major phenolic in the NADES-based pomegranate extract, with a concentration about 87% higher than that found in the ethanolic extract obtained under the same conditions. The same was valid for (+)-catechin, a major phenolic in almond extracts, and cyanidin-3-sambubioside, a major anthocyanin in elderberry extracts, with concentrations around 27 and 68% higher in the NADES extracts, respectively. These findings show that the extraction of valuable compounds from agro-industrial waste using NADES was improved with accuracy during ultrasound-assisted extractions. (AU)

• FAPESP's process: 22/04977-8 - Association of agro-industrial waste in the formulation of active chitosan and gelatin-based coatings: valorization of pomegranate and almond peel extracts as sources of phenolic compounds
• Grantee: Mirella Romanelli Vicente Bertolo
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
• FAPESP's process: 19/18748-8 - Chemical composition of strawberries coated with biofilm-based on pomegranate peel extract, chitosan, and gelatin
• Grantee: Mirella Romanelli Vicente Bertolo
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 22/03229-8 - Synthesis, characterization and applications of natural deep eutectic solvents (NADES)
• Grantee: Stanislau Bogusz Junior
• Support Opportunities: Research Grants - Initial Project