One-Step Extraction of Olive Phenols from Aqueous Solution Using β-Cyclodextrin in the Solid State, a Simple Eco-Friendly Method Providing Photochemical Stability to the Extracts
The extraction of phenolic compounds from olive mill wastes is important, not only to avoid environmental damages, but also because of the intrinsic value of those biophenols, well-known for their high antioxidant potential and health benefits. This study focuses on tyrosol (Tyr) and hydroxytyrosol...
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doaj-f1e4d706a71d45c394a463a7cfde69102021-08-06T15:28:49ZengMDPI AGMolecules1420-30492021-07-01264463446310.3390/molecules26154463One-Step Extraction of Olive Phenols from Aqueous Solution Using β-Cyclodextrin in the Solid State, a Simple Eco-Friendly Method Providing Photochemical Stability to the ExtractsAurélia Malapert0Emmanuelle Reboul1Olivier Dangles2Alain Thiéry3N’nabinty Sylla4Valérie Tomao5Avignon University, INRAE, UMR408 MicroNut Team, 84000 Avignon, FranceAix-Marseille University, INRAE, INSERM, C2VN, Marseille, FranceAvignon University, INRAE, UMR408 MicroNut Team, 84000 Avignon, FranceAix-Marseille Université, Avignon University, CNRS, IRD, IMBE UMR 7263, 13000 Marseille, FranceUniversité Mohamed V de Rabat, BP 8007, Rabat 10000, MoroccoAvignon University, INRAE, UMR408 MicroNut Team, 84000 Avignon, FranceThe extraction of phenolic compounds from olive mill wastes is important, not only to avoid environmental damages, but also because of the intrinsic value of those biophenols, well-known for their high antioxidant potential and health benefits. This study focuses on tyrosol (Tyr) and hydroxytyrosol (HT), two of the main phenolic compounds found in olive mill wastes. A new, simple, and eco-friendly extraction process for the removal of phenolic compounds from aqueous solutions using native β-cyclodextrin (β-CD) in the solid state has been developed. Several β-CD/biophenol molar ratios and biophenol concentrations were investigated, in order to maintain β-CD mostly in the solid state while optimizing the extraction yield and the loading capacity of the sorbent. The extraction efficiencies of Tyr and HT were up to 61%, with a total solid recovery higher than 90% using an initial concentration of 100 mM biophenol and 10 molar equivalents of β-CD. The photochemical stability of the complexes thus obtained was estimated from ∆E*ab curve vs. illumination time. The results obtained showed that the phenols encapsulated into solid β-CD are protected against photodegradation. The powder obtained could be directly developed as a safe-grade food supplement. This simple eco-friendly process could be used for extracting valuable biophenols from olive mill wastewater.https://www.mdpi.com/1420-3049/26/15/4463hydroxytyrosoltyrosolβ-cyclodextrinextraction |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Aurélia Malapert Emmanuelle Reboul Olivier Dangles Alain Thiéry N’nabinty Sylla Valérie Tomao |
spellingShingle |
Aurélia Malapert Emmanuelle Reboul Olivier Dangles Alain Thiéry N’nabinty Sylla Valérie Tomao One-Step Extraction of Olive Phenols from Aqueous Solution Using β-Cyclodextrin in the Solid State, a Simple Eco-Friendly Method Providing Photochemical Stability to the Extracts Molecules hydroxytyrosol tyrosol β-cyclodextrin extraction |
author_facet |
Aurélia Malapert Emmanuelle Reboul Olivier Dangles Alain Thiéry N’nabinty Sylla Valérie Tomao |
author_sort |
Aurélia Malapert |
title |
One-Step Extraction of Olive Phenols from Aqueous Solution Using β-Cyclodextrin in the Solid State, a Simple Eco-Friendly Method Providing Photochemical Stability to the Extracts |
title_short |
One-Step Extraction of Olive Phenols from Aqueous Solution Using β-Cyclodextrin in the Solid State, a Simple Eco-Friendly Method Providing Photochemical Stability to the Extracts |
title_full |
One-Step Extraction of Olive Phenols from Aqueous Solution Using β-Cyclodextrin in the Solid State, a Simple Eco-Friendly Method Providing Photochemical Stability to the Extracts |
title_fullStr |
One-Step Extraction of Olive Phenols from Aqueous Solution Using β-Cyclodextrin in the Solid State, a Simple Eco-Friendly Method Providing Photochemical Stability to the Extracts |
title_full_unstemmed |
One-Step Extraction of Olive Phenols from Aqueous Solution Using β-Cyclodextrin in the Solid State, a Simple Eco-Friendly Method Providing Photochemical Stability to the Extracts |
title_sort |
one-step extraction of olive phenols from aqueous solution using β-cyclodextrin in the solid state, a simple eco-friendly method providing photochemical stability to the extracts |
publisher |
MDPI AG |
series |
Molecules |
issn |
1420-3049 |
publishDate |
2021-07-01 |
description |
The extraction of phenolic compounds from olive mill wastes is important, not only to avoid environmental damages, but also because of the intrinsic value of those biophenols, well-known for their high antioxidant potential and health benefits. This study focuses on tyrosol (Tyr) and hydroxytyrosol (HT), two of the main phenolic compounds found in olive mill wastes. A new, simple, and eco-friendly extraction process for the removal of phenolic compounds from aqueous solutions using native β-cyclodextrin (β-CD) in the solid state has been developed. Several β-CD/biophenol molar ratios and biophenol concentrations were investigated, in order to maintain β-CD mostly in the solid state while optimizing the extraction yield and the loading capacity of the sorbent. The extraction efficiencies of Tyr and HT were up to 61%, with a total solid recovery higher than 90% using an initial concentration of 100 mM biophenol and 10 molar equivalents of β-CD. The photochemical stability of the complexes thus obtained was estimated from ∆E*ab curve vs. illumination time. The results obtained showed that the phenols encapsulated into solid β-CD are protected against photodegradation. The powder obtained could be directly developed as a safe-grade food supplement. This simple eco-friendly process could be used for extracting valuable biophenols from olive mill wastewater. |
topic |
hydroxytyrosol tyrosol β-cyclodextrin extraction |
url |
https://www.mdpi.com/1420-3049/26/15/4463 |
work_keys_str_mv |
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