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Sustainable fabrication of arecanut waste-based polymer blend adsorbents for enhanced lead(II) ion removal from waterThis study presents a green and sustainable route for converting arecanut agricultural waste into efficient polymer blend adsorbent for Pb(II) removal from water.Incorporation of arecanut organic residue into a PVA-chitosan matrix enhances surface functionality and strengthens metal-ion interactions through hydroxyl and amine groups.The resulting films display improved adsorption capacity, favourable Langmuir isotherm behaviour, and rapid pseudo-second-order kinetics.Stable performance under optimized conditions highlights the potential of this low-cost, eco-friendly adsorbent for sustainable lead remediation in water systems.