Abstract
Abstract Adsorption of uranium (VI) from aqueous solution by Fe 3 O 4 @TiO 2 composites was studied by batch experiments. The adsorbent was characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and magnetic measurements. The adsorptions of uranium (VI) from aqueous solution on Fe 3 O 4 @TiO 2 were fitted to the Langmuir and Freundlich adsorption isotherms. The adsorption of uranium (VI) could be well-described by Langmuir. The maximum sorption capacity of Fe 3 O 4 @TiO 2 for uranium (VI) was evaluated to be 118.8 mg U g −1 at pH 6.0. Thermodynamic parameters further showed that the sorption was an endothermic and spontaneous process. The uranium (VI)-loaded Fe 3 O 4 @TiO 2 could be readily separated from aqueous solutions by an external magnetic field. Results suggested that Fe 3 O 4 @TiO 2 was a powerful promising sorbent for the efficient removal of uranium (VI) from aqueous solutions.
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