Ni(II) ions removal using maghemite nanoparticle on bentonite-clay was investigated. Adsorbent was synthesized using the sol-gel method characterized by the surface area Brunauer, Emmett, and Teller (BET), scanning electron microscopy and energy dispersive X-Ray spectrometer, transmission electron microscopy, FTIR spectroscopy, and zero-point-charge. Experiments were done as a function of solute concentration and temperature. Various kinetic models were evaluated and effective diffusion coefficient, activation energy, and entropy of activation were determined. The adsorption isotherm data were fitted to the Langmuir and Freundlich equations, and the Langmuir adsorption capacity was found to be 114.9mg/g. These results showed that the adsorbent is an attractive option for Ni(II) removal.