ArticleAntioxidants (Basel, Switzerland)2022
Green Extraction of Polyphenols from Waste Bentonite to Produce Functional Antioxidant Excipients for Cosmetic and Pharmaceutical Purposes: A Waste-to-Market Approach.
Article in Antioxidants (Basel, Switzerland), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- High Value-Added Secondary Raw Material From Winemaking Waste Bentonite to Design Antioxidant Pectin-Based Mucoadhesive Buccal Films.ChemistryOpen · 2026Article
- Physicochemical Characterization and Safety Assessment of Cosmetic Gels and Emulsions Containing Sand-Extraction Clays.Journal of cosmetic dermatology · 2025Article
- Cooperative Interaction of Hyaluronic Acid with Epigallocatechin-3-O-gallate and Xanthohumol in Targeting the NF-κB Signaling Pathway in a Cellular Model of Rheumatoid Arthritis.Antioxidants (Basel, Switzerland) · 2025Article
- Repurposing Olive Oil Mill Wastewater into a Valuable Ingredient for Functional Bread Production.Foods (Basel, Switzerland) · 2025Article
- Integrated proteomics highlights functional activation induced by advanced-platelet rich fibrin plus (A-PRF +) in primary equine fibroblasts.Scientific reports · 2025Article
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- Multicomponent Antibiofilm Lipid Nanoparticles as Novel Platform to Ameliorate Resveratrol Properties: Preliminary Outcomes on Fibroblast Proliferation and Migration.International journal of molecular sciences · 2023Article
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Authors and funding
9 authors.
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Abstract
In an ever-growing perspective of circular economy, the development of conscious, sustainable and environmental-friendly strategies to recycle the waste products is the key point. The scope of this work was to validate the waste bentonite from the grape processing industries as a precious matrix to extract polyphenols by applying a waste-to-market approach aimed at producing novel functional excipients. The waste bentonite was recovered after the fining process and opportunely pre-treated. Subsequently, both the freeze dried and the so-called "wet" bentonites were subjected to maceration. PEG200 and Propylene Glycol were selected as solvents due to their ability to dissolve polyphenols and their wide use in the cosmetic/pharmaceutical field. The extracts were evaluated in terms of yield, density, pH after water-dilution, total phenolic (Folin-Ciocalteu) and protein (Bradford) contents, antioxidant power (DPPH), amount of some representative polyphenols (HPLC-DAD), cytocompatibility and stability. Both solvents validated the bentonite as a valuable source of polyphenols and led to colored fluids characterized by an acidic pH after water-dilution. The best extract was obtained from the wet bentonite with PEG200 and highlighted the highest phenolic content and consequently the strongest antioxidant activity. Additionally, it displayed proliferative properties and resulted almost stable over time. Hence, it might be directly used as polyphenols-enriched functional novel raw material for cosmetic and pharmaceutics purposes.
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