The magnetite Fe₃O₄ was supported on active carbon AC (Fe₃O₄ /AC) and oxidized active carbon OAC (Fe₃O₄ /OAC). It was prepared by co-precipitation method and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), surface area measurements (BET) and vibrating sample magnetometer (VSM) techniques. Fe₃O₄ /AC and Fe₃O₄ /OAC were used as adsorbents for removal of Cu (II) ions from wastewater. The effect of adsorption parameters such as contact time, the pH of the solution, the weight of adsorbent and the initial concentration of Cu(II) ions was elucidated to achieve the process's optimal operational conditions. It was found that the removal percentage of the Cu(II) ions was reached to  96.15 % after 30 min. The adsorption process fitted very well the pseudo-second-order model and the adsorption equilibrium data could be well described by the Langmuir isotherm.