The extraction of active compounds from plant waste: the potential in human and industrial applications as the concept of zero waste in the circular economy
ABSTRACT Plant waste contains various active compounds that can be applied in food, pharmaceutical, cosmetic, or other industries. Polyphenols, carotenoids, pectin, aromas, fibers, or enzymes extracted from agrifood waste can be considered ready-to-use without demanding and expensive downstream isolation and purification steps. In the present study, plant extracts were prepared using Thymus serpyllum and Vaccinium myrtillus leaf dust and empty Aloe vera leaves (the matrix without aloe gel). The biological potential of T. serpyllum, V. myrtillus, and A. vera waste extracts with the highest polyphenol yield was investigated. T. serpyllum extract possessed the highest DPPH radical scavenging capacity (1.50±0.02 mg/mL). It also had antimicrobial potential against all examined strains, particularly against Enterococcus faecalis, and showed spasmolytic activities in isolated rat ileum models of spontaneous contractions, acetylcholine- and potassium chloride-induced contractions. V. myrtillus extract showed the highest ABTS radical scavenging potential (48.77±1.47 µmol Trolox equivalents/g of plant material) and significant antimicrobial and skin regeneration activity (percentage of wound healing was 29.2±1.8). However, A. vera extract had the lowest antioxidant capacity and did not show antimicrobial potential, while it showed a significant wound healing influence (30.9±1.7%). Due to showed the biological potential of all prepared waste extracts, they can be potentially used in the food, pharmaceutical, and cosmetic industries. In future experiments, T. serpyllum waste extract will be examined in terms of bronchodilatory activity, whereas all prepared waste extracts will be investigated via effects on enzymes, dying of textile, as well as anticorrosive effects.
engleski
2023
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Creative Commons CC BY-NC-ND 4.0 - Creative Commons Autorstvo - Nekomercijalno - Bez prerada 4.0 International License.
http://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
biological activities, extraction, industrial potential, plant waste