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The increasing amounts of agro-food waste generated globally represent a major challenge for environmental protection and sustainable development. Among these, onion peels resulting from processing, storage, and commercialization constitute an important source of bioactive compounds such as flavonoids, polyphenols, quercetin, and sulfur-containing compounds, with high potential for valorization in the field of green nanotechnologies. The study aims to valorize the extract obtained from onion peels in the green syn...