Adsorption Kinetics and Adsorption Isotherms of Bovin Serum Albumin (BSA) onto Magnetic ZnFe₂O₄ Nanoparticles

Magnetic ZnFe₂O₄ nanoparticles were prepared by the rapid combustion process, their structure and magnetic properties were investigated by XRD, SEM, TEM and VSM. The as-prepared magnetic ZnFe₂O₄ nanoparticles were characterized with the average grain size of about 18 nm, the specific magnetization of 3.1 Am²/kg, and the specific surface area of 53.3 m²/g. The adsorption kinetics and adsorption isotherms of bovine serum albumin (BSA) in aqueous solution onto the magnetic ZnFe₂Os₄ nanoparticles at room temperature were investigated. The kinetics data related to the adsorption of BSA from aqueous solutions were in good agreement with the pseudo-first-order kinetic model in the initial concentration of 0.4–1.2 mg/mL. Compared with the Langmuir, Freundlich and Redlich-Peterson models for adsorption isotherms of BSA, the Temkin model (correlation coefficient R ² = 0.9977) could be used to evaluate BSA adsorption isotherm at room temperature.