Recovery and concentration of antioxidants from winery wastes

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2012_molecules_soto_recovery_concentration.pdf (430.74 KB)
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URI: http://hdl.handle.net/10347/21760
E-ISSN: 1420-3049
DOI: 10.3390/molecules17033008

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2012

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Grape and wine byproducts have been extensively studied for the recovery of phenolic compounds with antioxidant activity and a variety of biological actions. The selective recovery and concentration of the phenolic compounds from the liquid phase separated from further diluted winery wastes has been proposed. Adsorption onto non ionic polymeric resins and further desorption with ethanolic solutions was studied. Several commercial food grade resins were screened with the aim of selecting the most suited for the practical recovery of phenolic compounds with radical scavenging activity. Under the optimized desorption conditions (using Sepabeads SP207 or Diaion HP20 as adsorbents and eluting with 96% ethanol at 50 °C) a powdered yellow-light brown product with 50% phenolic content, expressed as gallic acid equivalents, was obtained. The radical scavenging capacity of one gram of product was equivalent to 2–3 g of Trolox

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Winery wastes| Phenolics| Adsorption| Resins| Radical scavengers

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Soto, M.L.; Conde, E.; González-López, N.; Conde, M.J.; Moure, A.; Sineiro, J.; Falqué, E.; Domínguez, H.; Núñez, M.J.; Parajó, J.C. Recovery and Concentration of Antioxidants from Winery Wastes. Molecules 2012, 17, 3008-3024

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The authors are grateful to grateful to the Spanish Ministry of Education and Science (Research Project reference ALG2006-05387, which had partial financial support from the FEDER funds of the European Union), and to Xunta de Galicia (Research Project Ref. PGIDIT06 TAM38301PR) for the financial support of this work. The authors thank Miguel Estévez for his excellent technical support. EC thanks the Spanish MEC (PTA-2003-02-00194) and AM thanks the MEC (PTA-2003-01-00194) and the Isidro Parga Pondal Program (Xunta de Galicia)

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© 2012 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/)

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Enxeñaría Química