Magnetic bentonite as a heterogeneous nanocatalyst for electro-Fenton treatment

In this work, magnetic bentonite was successfully prepared and then applied for the degradation of rhodamine B (RhB). The morphology and structure properties of the prepared catalyst was thoroughly studied by field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), energy dispersive X-ray spectroscopy (EDX) and elemental mapping analysis. The electro-Fenton studies were carried out in an undivided electrochemical cell equipped with a platinum sheet as anode and graphite plate as cathode. Effects of initial pH, applied current intensity, catalyst dose and initial dye concentration on the mineralization of RhB were examined and determined as ۴.۰, ۱.۵ g L-۱, ۴۰ mg L-۱ and ۱۸۰ mA, respectively. An almost total mineralization was acquired for a ۵۰ mg L-۱ RhB solution in ۶۰ min reaction time. Account for the high catalytic capability, chemical constancy and inexpensive cost, the magnetic bentonite has great potential working as an electro-Fenton catalyst for industrial applications.

کلیدواژه ها:

Electro-Fenton ، Hydroxyl radicals ، Magnetic bentonite ، Dye mineralization