Waste bacteria stick(MS)and red mud(RM)were calcined to obtain powdered waste bacteria stick red mud biochar(MSRMBC).The aerogel particle electrode(MSRMBC@SA)was prepared by embedding MSRMBC with sodium alginate(SA)as the skeleton by suspension titration CaCl2 method.The electrode was characterized by scanning electron microscope(SEM),energy dispersive spectrom(EDS),fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),N2 adsorption-desorption(BET)and cyclic voltammetric curve(CV).The three-dimensional electrofenton system(3D-EF-MSRMBC@SA)was constructed by MSRMBC@SA.Using carbamazepine(CBZ)as the model compound,the effects of MSRMBC@SA dosage,voltage,aeration rate and pH on the electrocatalytic performance of MSRMBC@SA were investigated.Under the optimal degradation conditions,the degradation rate of CBZ(10 mg/L)was 86.05％.Because MSRMBC@SA has good pH adjustment ability,the system is less affected by pH value.Free radical quenching,electron spin resonance(ESR)and X-ray photoelectron spectroscopy(XPS)characterization showed that·OH was the main active species,and MSRMBC@SA played a key catalytic role in the degradation of CBZ.Further studies show that MSRMBC@SA has good stability,and 3D-EF-MSRMBC@SA has lower energy consumption and better degradation effect than 2D-EF and 3D-EF-MSRMBC.MSRMBC@SA can effectively reduce the biological toxicity of CBZ solution,and has a good application prospect for the actual degradation of CBZ antibiotic wastewater.
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