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[This article belongs to Volume - 57, Issue - 04]

Abstract : This study focused on the enzymatic preparation of chitin and the characterization of the chitosan produced by ultrasound. The results gave a degree of deacetylation (DD) of 82% and a molecular weight of 107±0.44 KDa. Chitosan nanoparticles were synthesized using an ultrasonic system and characterized by FTIR, XRD and SEM. FTIR analysis confirmed the structure of the chitosan nanoparticles, while XRD diffraction revealed crystalline regions in the nanoparticles. SEM images show nanosized chitosan particles in a porous network. Sorption of zinc ions on chitosan showed efficient removal rates, with zinc removal efficiencies of 55.19%, 76.46% and 84.39% for different initial concentrations. The use of ultrasonic waves improved the adsorption capacity and selectivity of chitosan-based materials for heavy metals such as Zinc. The study highlights the potential of chitosan for applications in water treatment and heavy metal removal.