Abstract
In this study, the removal of Rhodamine B at high concentrations (25–100 ppm) from aqueous solution was carried out via the heterogeneous UV-Fenton catalytic process based on Fe3O4 nanoparticles. The removal efficiency of Rhodamine B (C0 = 50 ppm) reached 100% after 4 hours treatment, corresponding to the mineralization efficiency of 70%. In comparison with the conventional Fenton processes, the assistance of UV irradiation boosted the OH• radical generation and prevented the formation of ionic complexes between Fe3+ and Rhodamine B, permitting the catalyst activity improvement. In addition, Fe3O4 nanoparticles could be easily separated by an external magnet and then re-cycled several times with minimal loss of catalyst activity.
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