Cobalt ferrite hollow spheres were prepared by a simple solvothermal method. The obtained CoFe 2 O 4 was applied as magnetic adsorbent for the extraction of uranium(VI) ions from aqueous solutions. The maximum adsorption capacity was observed at pH 6.00. Maximum removal of 96.8% was observed for an initial concentration of 50mg/L at pH 6.00 and an adsorbent dose of 0.05g, displaying a high efficiency for the removal of uranium(VI) from aqueous solution. Equilibrium was achieved in approximately 180min. The results indicate that CoFe 2 O 4 has potential as an adsorbent for sorption uranium(VI), using a simple, fast separation method for removal of uranium(VI) ions from aqueous solution.