Towards a sustainable utilization of Tannat grape seeds: extraction of bioactive compounds through green technologies and waste revalorization

Dublin Core

Title

Towards a sustainable utilization of Tannat grape seeds: extraction of bioactive compounds through green technologies and waste revalorization

Subject

UVA TANNAT
COMPUESTOS BIOACTIVOS
PROPIEDADES TECNOFUNCIONALES
SUBPRODUCTOS
INDUSTRIA VITIVINICOLA
TECNOLOGIAS DE EXTRACCION SOSTENIBLES
BIBLIOGRAFIA NACIONAL QUIMICA
2026

Abstract

Valorizing wine industry by-products like Tannat grape seeds offers a sustainable path to recover high-value bioactives and reduce environmental impact. This study aims to achieve their comprehensive value-added utilization by comparing extraction methods to obtain bioactive compounds of interest and by characterizing the functional properties of the solid residue remaining after extraction. Three extraction techniques were applied: the conventional Soxhlet method, using either absolute ethanol or hexane, supercritical fluid extraction (SFE) and pressurized liquid extraction (PLE), assessing the effects of temperature and ethanol concentration on extraction yield and antioxidant properties. Under optimal conditions (80 ◦C and 67 % ethanol), PLE achieved a higher yield than the conventional method, with elevated α-tocopherol content (844.4 ± 15.3 mg/kg mg/kg) and a lipid fraction dominated by polyunsaturated fatty acids, primarily linoleic acid. This fraction showed significant antioxidant capacity as determined by the ABTS and ORAC-FL assays and, in an accelerated oxidation test, increased the induction period of sunflower oil in a concentration-dependent manner, with an effect comparable to that of the synthetic antioxidant BHA. The solid residue generated after PLE was evaluated for its technofunctional properties. It exhibited higher water-holding capacity compared with untreated ground seeds, possibly due to its higher relative fiber content and structural changes induced by processing. Furthermore, the residue retained residual bioactive properties, highlighting its potential as a functional ingredient. Overall, these results support the use of PLE as an efficient strategy for the integral and sustainable utilization of Tannat grape seeds.

Source

The Journal of Supercritical Fluids

Publisher

Elsevier

Date

2026

Rights

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Format

PDF

Extent

10 p.

Language

Inglés

Type

Artículo

Identifier

10.1016/j.supflu.2025.106850

Document Item Type Metadata

Original Format

PDF
Date Added
September 24, 2026
Collection
Bibliografía Nacional Química
Item Type
Document
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Citation
Bonifacino, Carla et al., “Towards a sustainable utilization of Tannat grape seeds: extraction of bioactive compounds through green technologies and waste revalorization,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed October 7, 2026, https://riquim.fq.edu.uy/items/show/7123.