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Adsorption of Cd2+ ions from Synthetic Water by Magnetic Core Shell Nanocomposite SiO2/FeO/Fe3O4/SiO2

Elfiky AA, Fathy M, Eltorgoman AM and Moghny TA

The magnetic silica core shell nanocomposite SiO2/FeO/Fe3O4/SiO2, which designated by (AS/Fe/AS), was synthesized and characterized by chemical analyses, FTIR, XRD, SEM, HR-TEM. The magnetic properties of (AS/Fe/AS) as a function of magnetic field, temperature, and time was measured using Vibrating Sample Magnetometer (VSM). Finally, the chemical purity and their stoichiometry of magnetic core shell SiO2 /FeO/ Fe3O4/ SiO2 (AS/Fe/AS) were done by Energy-dispersive X-ray spectroscopy (EDX). Also, the kinetic and isotherm studied were carried out by considering some important factors such as temperature, time and initial metal concentration on the adsorption capacity of (AS/Fe/AS) to remove Cd2+ ions from synthetic polluted water. The result confirms that we have successfully synthesized a new high-purity magnetite nanocomposite (AS/Fe/AS), which characterized by the presence of highly saturated magnetization and intensively black color. Also, we found that the kinetic and isotherm studied revealed that the adsorption kinetics and equilibrium data were best fitted by pseudo-second order kinetic model and Freundlich adsorption isotherm.