Synthesis of Magnetite Nanoparticles for the Removal of Mn (II) from Aqueous Solution

H.I. Adegoke, F.A. Adekola, T.A. Atolagbe
University of Ilorin,

Keywords: magnetite, nanoparticles, TEM, SEM, FTIR, adsorption


Magnetite, Fe3O4 nanoparticles from ferrous salt in alkaline aqueous solution was prepared using co-precipitation method at 60oC. Ammonium hydroxide (NH4OH) was used as precipitating agent to form black precipitate. The functional groups present were analyzed by Fourier Transform Infrared Spectroscopy (FT-IR). The structural investigation of the prepared sample was performed with Scanning Electron Microscopy (SEM), Transmission Electron microscopy (TEM). The properties of the magnetite nanoparticles prepared were studied for adsorption of Mn (II) ions from aqueous solution at different initial concentrations, pH values, adsorbent dose and contact time. The adsorption capacity of the prepared magnetite nanoparticles at different, initial concentrations, pH values, dosage values and time of contact with Mn (II) ions in aqueous solution was also studied. The Freundlich model better interprets the adsorption data. A kinetic analysis showed that the adsorption of investigated ions onto Fe3O4 nanoparticles occurs by a pseudo-second order mechanism. Magnetite nanoparticles can be used as an effective, convenient and low-cost material for the removal of Mn (II) ion from wastewater.