MAGNETIC METALORGANIC FRAMEWORK CuBDC@Fe3O4: SYNTHESIS, CHARACTERIZATION AND ITS APPLICATION FOR METHYLENE BLUE ADSORPTION

Abstract

CuBDC@Fe3O4 material has been synthesized, characterized by the methods of XRD, FTIR, EDX, TGA, SEM and used as an adsorbent for removal of methylene blue (MB) from wastewater. The novel adsorbent from recycled terephtalic acid from PET bottles waste combine advantages of MOFs and magnetic nanoparticles and possess low cost, environment-friendly, rapid removal within 40 minutes, easy separation of the solid phase and can be recycled many times. It was clarified that MB adsorption with pi-pi stacking interaction is dominant at pH = 4, in addition, with pH < 4 and pH > 4, respectively, there is the contribution of H-bonding and electrostatic interactions. The adsorption isotherm data were fitted well to Langmuir isotherm and maximum adsorption capacity reaches 50.01 mg/g. Adsorption kinetic results were studied based on well-known kinetic models: pseudo first-order, second-order.