Introduction: The growing emphasis on sustainability and waste management has led to innovative approaches in utilizing agricultural waste. This study explores the use of local palm tree waste for the synthesis of zinc oxide nanoparticles (ZnO NPs) and nanocomposite beads, aiming to create value-added materials for biomedical and environmental applications.

Methods: Palm tree waste was collected and processed to extract cellulose, which served as a substrate for ZnO NP synthesis. Zinc acetate was used as the zinc precursor, and a green synthesis approach was employed, utilizing the reducing and stabilizing properties of palm waste-derived cellulose. The ZnO NPs were characterized using UV-Vis spectroscopy, and transmission electron microscopy (TEM). The ZnO NPs were then embedded into alginate beads to form nanocomposite beads, which were evaluated for their structural integrity and functional properties.

Results: The green synthesis method successfully produced ZnO NPs with a mean diameter of 20-30 nm, as confirmed by TEM analysis. XRD patterns indicated the crystalline nature of the ZnO NPs. The nanocomposite beads exhibited enhanced mechanical stability and were effective in various applications. In biomedical assays, the beads demonstrated significant antibacterial activity against Escherichia coli and Staphylococcus aureus. For environmental applications, the beads showed promising results in the adsorption of heavy metals from aqueous solutions, indicating their potential for water purification.

Conclusions: This study highlights the dual benefits of waste valorization and sustainable material production. The successful incorporation of palm tree waste into ZnO NPs and nanocomposite beads underscores the potential of these materials in addressing biomedical and environmental challenges. Future research will focus on optimizing the synthesis process and expanding the application scope of these eco-friendly nanomaterials.