Ceria nanoparticles supported on aligned carbon nanotubes (CeO_2/VACNTs), a novel adsorbent for fluoride from drinking water, were prepared by chemical reaction of CeCl_3 with NaOH on aligned carbon nanotube solution and subsequent heat treatment. The best fluoride adsorption effect of CeO_2/ACNTs occurs at pH 4.0 ～ 9.0. The largest adsorption capacity of CeO_2/ACNTs reaches 33.7 mg g~(-1) at an equilibrium fluoride concentration of 18.0 mg l~(-1) at pH 7.0. The experiment results suggest that CeCO_2/ACNTs have great potential applications in environmental protection.
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