Nano-sized NiFe2O4 is one type of ferrite that has been studied extensively. It shows peculiar structural and magnetic properties. Small particle size promotes a mixed spinel structure whereas the bulk form is an inverse spinel. As far as the magnetic properties of these materials are concerned, spin glass like behavior can be considered as the most interesting property that leads to high field irreversibility, shift of the hysteresis loops, and anomalous relaxation dynamics. First, crystalline NiFe2O4 powder was synthesized on a nanoscale dimension by a simple one-step co-precipitation chemical route, and then used to produce activated carbon/NiFe2O4 nanocomposite. The structure and morphology of the as-prepared composite was characterized by X-ray diffraction (XRD) pattern, transmission electron microscope (TEM) and fourier transform infrared (FT-IR) spectroscopy. Eventually, the as-prepared composite was used for exclusion of heavy cations from wastewater in different conditions. A significant absorption capacity (250 mg g-1) showed that this nanocomposite could be useful for the removal of heavy cations from wastewater. پرونده مقاله