ArticleAntioxidants (Basel, Switzerland)2023
From Waste to Green: Water-Based Extraction of Polyphenols from Onion Peel and Their Adsorption on Biochar from Grapevine Pruning Residues.
Article in Antioxidants (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Simple presoaking modulates phytochemical recovery, antioxidant capacity, and macrophage responses of onion skin extracts.Food chemistry: X · 2026Article
- Spleen Metabolome Reveals Immune-Mediated Responses Modulated by Onion Peel Extract inMicroorganisms · 2026Article
- A Grape-Derived Solvent for the Recovery of Phenolic Compounds from Food Waste By-Products Using Ultrasonic-Assisted and Overnight Extraction.Molecules (Basel, Switzerland) · 2025Article
- Box-Behnken Design Optimization of Green Extraction from Tomato Aerial Parts and Axillary Shoots for Enhanced Recovery of Rutin and Complementary Bioactive Compounds.Antioxidants (Basel, Switzerland) · 2025Article
- Analytical Strategies for Green Extraction, Characterization, and Bioactive Evaluation of Polyphenols, Tocopherols, Carotenoids, and Fatty Acids in Agri-Food Bio-Residues.Molecules (Basel, Switzerland) · 2025Review
- Valorization of Olive Leaf Polyphenols by Green Extraction and Selective Adsorption on Biochar Derived from Grapevine Pruning Residues.Antioxidants (Basel, Switzerland) · 2023Article
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Authors and funding
11 authors.
Funding
Abstract
Onion peels (OP) are rich in bioactive compounds with a plethora of benefits for human health, but this valuable material is often wasted and underutilized due to its inedibility. Likewise, grapevine pruning residues are commonly treated as agricultural waste, but biochar (BC) obtained from this material has favorable characteristics as an adsorbent. This study investigated the potential of BC in removal of targeted polyphenolic compounds from OP extracts. The OP extracts were obtained adhering to green chemistry principles using deionized water amplified by three methods: maceration (MAC), ultrasound-assisted extraction (UAE), and microwave-assisted extraction (MAE). The extraction efficiency on the polyphenolic profile and antioxidant capacity was investigated with different extraction temperatures and solid-to-liquid (s/l) ratios. For further analysis, UAE at 90 °C with an s/l ratio of 1:100 was used due to higher polyphenolic compound yield. The BC adsorption capacity of individual polyphenols was fitted with the Langmuir and Freundlich isotherm models. Quercetin-3,4'-diglucoside obtained the highest R
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Registered trials
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