Development of a Green Methodology for Simultaneous Extraction of Polyphenols and Pigments from Red Winemaking Solid Wastes (Pomace) Using a Novel Glycerol-Sodium Benzoate Deep Eutectic Solvent and Ultrasonication Pretreatment
| Autor: | Dimitris P. Makris, Stavros Lalas, Aggeliki Alibade, Arhontoula Chatzilazarou, Eleni Bozinou, Achillia Lakka |
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| Rok vydání: | 2021 |
| Předmět: |
red grape pomace
Renewable Energy Sustainability and the Environment Chemistry Extraction (chemistry) Pomace food and beverages glycerol Environmental technology. Sanitary engineering anthocyanins ultrasonication Malvidin Deep eutectic solvent Solvent chemistry.chemical_compound antioxidants Glycerol Sodium benzoate Sodium acetate TD1-1066 polyphenols Ecology Evolution Behavior and Systematics deep eutectic solvents General Environmental Science Nuclear chemistry |
| Zdroj: | Environments Volume 8 Issue 9 Environments, Vol 8, Iss 90, p 90 (2021) |
| ISSN: | 2076-3298 |
| DOI: | 10.3390/environments8090090 |
| Popis: | In this examination, two glycerol-based deep eutectic solvents (DESs) were tested for their efficiency in the recovery of antioxidant polyphenols and anthocyanin pigments from red grape pomace (RGP). The two DESs synthesized had sodium acetate and sodium benzoate as hydrogen bond acceptors, to test the role of the hydrogen bond acceptor polarity on the extraction performance. Furthermore, the process was enhanced by an ultrasonication pretreatment stage. After initial testing with respect to water content, ultrasonication power and liquid-to-solid ratio, the DES composed of glycerol and sodium benzoate (GL-SBz) was shown to be significantly more efficient than the one made of glycerol and sodium acetate (GL-SAc). Further optimization of the extraction with regard to time and temperature demonstrated GL-SBz to be a highly effective solvent for the production of RGP extracts rich in polyphenols including gallic acid, catechin and quercetin, and pigments including malvidin 3-O-glucoside p-coumarate and malvidin 3-O-glucoside. The extracts produced also had significantly higher antiradical activity and reducing power compared to those generated with aqueous ethanol or water. From this study, evidence emerged regarding the role of the hydrogen bond acceptor nature in the extraction efficiency of polyphenols. The process developed is proposed as a green, high-performing methodology for the production of RGP extracts with enhanced polyphenolic content and antioxidant activity. |
| Databáze: | OpenAIRE |
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