Kinetic and Isotherm Investigations of Methylene Blue Adsorption from Aqueous Solution Using PVA/AG/CuFe2O4 Magnetic Nanocomposite

This research aims to synthesize a novel adsorbent and reduce the contact time in removing methylene blue dye. Copper ferrite nanoparticles were prepared by solvothermal method and CuFe2O4/PVA/AG magnetic nanocomposite by freeze-thaw method and drying at room temperature. The structure and morphology of magnetic nanocomposite were investigated using FTIR, XRD, SEM, and EDX methods. CuFe2O4/PVA/AG adsorbent under optimal conditions of pH = 7, contact time 60 min, amount of adsorbent 40 mg, dye concentration 5ppm and temperature 25 ᵒC was investigated. The maximum absorption and absorption capacity were obtained as 81.1 % and 14.93 mg/g, respectively. In addition to investigating the recovery effect of the adsorbent for comparison, the PVA/AG adsorbent was investigated under the aforementioned optimal conditions, and the maximum removal efficiency was 63.5 %. Examining the isotherm of the equilibrium state of dye removal matches well with the Freundlich isotherm. The kinetics of surface adsorption were investigated, and observed that the adsorption process on the magnetic nanocomposite follows pseudo-second-order kinetic equations.