In this study, a Chitosan/ZrO2@CoMoO4 nanocomposite was synthesized with the aim of removing the organic dye Scarlet 4BS from aqueous solutions. First, zirconium dioxide nanoparticles were prepared an‎d then combined with cobalt molybdate. Finally, it was incorporated into the chitosan structure as a biocompatible polymer. The samples were characterized using XRD, FT-IR, Zeta potential, FE-SEM, EDX, an‎d elemental mapping analyses. The results confirmed the successful formation of the nanocomposite structure, uniform distribution of particles on the chitosan matrix, an‎d the presence of surface-active functional groups. The adsorption performance of the adsorbent in removing 4BS dye was investigated under various conditions, an‎d the optimum conditions were found to be pH = 7 with a removal efficiency of 99.5%, an initial concentration of 260 ppm, an‎d adsorbent dosage of 3 mg, under which the maximum adsorption capacity reached 147.5 mg/g. The isotherm study showed that the experimental data were fitted to the linear Freundlich model. Moreover, the kinetic analysis demonstrated that the results were most consistent with the Elovitch model. Accordingly, the synthesized nanocomposite can be proposed as a stable, efficient, an‎d environmentally friendly adsorbent for removal of dye pollutants from industrial wastewater.

علي حسين كيانفر

محمد ديناري , كاظم كرمي