The objectives of this research were to synthesize magnetite nanoparticles (Fe3O4) and determining its efficiency in Cadmium removal from aqueous solutions. Consequently, magnetite nanoparticles were synthesized and the effect of pH, contact time, Cadmium concentration and nanoparticles amount on cadmium removal efficiency were investigated in batch system. Scanning Electron Microscope (SEM), XRD and FTIR were used to characterization of the synthesized magnetite nanoparticles. SEM results showed that the diameter of the particles is 40-60 nm. Results also showed that the optimum pH value for adsorption was 6. The adsorption capacity increased and the adsorption efficiency decreased with increasing concentration of Cadmium ions and reducing the amount of adsorbent. The magnetite nanoparticles have advantages such as high removal efficiency and short reaction time and can be used as a method to remove Cadmium from aqueous solutions.
