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• Soto, M
• Conde, E
• González-López, N
• Conde, M
• Moure, A
• Sineiro, J
• Falqué, E
• Domínguez, H
• Núñez, M
• Parajó, J
• [+] on Google Scholar
• Soto, M
• Conde, E
• González-López, N
• Conde, M
• Moure, A
• Sineiro, J
• Falqué, E
• Domínguez, H
• Núñez, M
• Parajó, J
• [+] on PubMed
• Soto, M
• Conde, E
• González-López, N
• Conde, M
• Moure, A
• Sineiro, J
• Falqué, E
• Domínguez, H
• Núñez, M
• Parajó, J

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Molecules 2012, 17(3), 3008-3024; doi:10.3390/molecules17033008

Article

Recovery and Concentration of Antioxidants from Winery Wastes

María Luisa Soto ¹ , Enma Conde ^1,2 , Noelia González-López ^1,2 , María Jesús Conde ¹ , Andrés Moure ^1,2 , Jorge Sineiro ³ , Elena Falqué ⁴ , Herminia Domínguez ^1,2,* , María José Núñez ³  and Juan Carlos Parajó ^1,2

¹ Departamento de Enxeñaría Química, Universidade de Vigo (Campus Ourense), Edificio Politécnico, As Lagoas, Ourense 32004, Spain ² CITI, Tecnópole, San Cibrao das Viñas, Ourense 32901, Spain ³ Escola Técnica Superior de Enxeñaría, Universidade de Santiago de Compostela, Avda. Lope Gómez de Marzoa sn, Santiago de Compostela 15782, Spain ⁴ Departamento de Química Analítica, Universidade de Vigo (Campus Ourense), Edificio Politécnico, As Lagoas, Ourense 32004, Spain

* Author to whom correspondence should be addressed.

Received: 21 December 2011; in revised form: 10 February 2012 / Accepted: 27 February 2012 / Published: 9 March 2012

(This article belongs to the Section Natural Products)

Download PDF Full-Text [436 KB, uploaded 9 March 2012 14:48 CET]

Abstract: 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.

Keywords: winery wastes; phenolics; adsorption; resins; radical scavengers

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