Abstract
In this paper, magnetic composite Fe3O4/CeO2 (MC Fe/Ce) was synthesized via CeO2 covered onto the surface of Fe3O4 by sol-precipitation method. The as-synthesized samples were characterized by FE-SEM, XRD, SEM-EDS and FT-IR spectrum. The pseudo-second-order (PSO) kinetic can describe well the adsorption of Acid black 210 (AB210) onto the as-obtained MC Fe/Ce of which the adsorption isotherm fits the Langmuir adsorption model better than Freundlich adsorption model. Furthermore, the maximum monolayer adsorption capacity of MC Fe/Ce is about 93 mg/g, which is 6 times more than that of commercial CeO2 for AB210. Moreover, the removal rate of the adsorbates for AB210 is 82.3% after first adsorption and still about 70% the fourth forth adsorption experiments within 120 min, which demonstrates that the obtained MC Fe/Ce has outstanding adsorption capacity and good stability. Additionally, the composite can be easily separated from aqueous solution in a few seconds with an external magnetic field due to its magnetic property, which is vital and has potential for its practical applications.
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