The Investigation of the Removal of the Arsenic from Wastewaters by Using NiFe2O4 Nanoparticles Produced with Microwave Assisted Combustion Method

Abstract

In this study,  nickel ferrite (NiFe₂O₄) nanoparticles were synthesized with  microwave assisted combustion  method. The structural and chemical properties of the nickel ferrite nanoperticles were determined by using X-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscope (SEM). The average particle diameters of the crystallite of the nickel ferrite nanoparticles were calculated using the Debye-Scherrer formula and  the average particle size  of the obtained nanoparticles found as  50 nm approximately. The micrographs of SEM have proved that all the nanoparticles were in the compositions of nano-crystallites.  Later,  these nanoparticles was used to remove the arsenic from synthetically prepared wastewaters by adsorption method. The concenrations of the arsenic in the aqueous medium  were determined by Flame Atomic Absorption Spectrometer (Schimadzu AA6800) equipped with hydride vapour generator system (HVG). The results were shown that the NiFe₂O₄ nanoparticles for the removal of the arsenic from wastewaters are quite effective and these nanoparticles had removed 92 % of the arsenic.