Preparation and characterization of a novel Mn-Fe₂O₄ nanoparticle loaded on activated carbon adsorbent for kinetic, thermodynamic and isotherm surveys of aluminum ion adsorption

Abstract

The focus of the current study is on the elimination of Al(III) ion from aqueous solutions by adsorption onto Mn-Fe2O4 nanoparticles loaded on activated carbon (Mn-Fe2O4-NPs-AC). Mn-Fe2O4 was synthesized by conventional co-precipitation method and then characterized using SEM, FT-IR, XRD and EDX techniques. The emphasis of the current study is on the optimal parameters that have been determined such as 2.5, 50 min, 50 mg, and 40 mg/L for pH, equilibrium time, adsorbent dosage and initial concentration. The obtained equilibrium data have best been fitted to the Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich (DR) adsorption isotherms (R2 = 0.9975).