Electrochemical treatment of norfloxacin with Mn/carbon black-nickel foam electrodes
Electrochemical degradation is a promising method for removing organic pollutants from water due to its low carbon footprint and high efficiency.In this study,we prepared Mn/carbon black-nickel foam electrodes using a co-precipitation method and characterized them using FESEM and X-ray photoelectron spectroscopy.We investigated the effects of applied voltage,plate spacing,elec-trolyte concentration,and initial norfloxacin concentration on the degradation of organic pollutants.The results indicated that Mn/carbon black-nickel foam electrodes exhibited excellent performance in pro-moting the generation of hydroxyl radicals(·OH)and enhancing the electro-Fenton effect.At optimal conditions,including an applied voltage of 6 V,plate spacing of 15 mm,electrolyte concentration of 20 mmol/L,and initial norfloxacin concentration of 10 mg/L,the norfloxacin removal percentage reached 83.9％.Additionally,the total organic carbon(TOC)removal percentage was 69.2％,and the energy consumption was 9.6 kW·h/m3.Furthermore,when compared to titanium ruthenium-nickel foam electrodes under the same conditions,the Mn/carbon black-nickel foam electrode exhibited a 15.8％increase in norfloxacin removal rate,a reduction of 0.6 kW·h/m3 in energy consumption,improved current efficiency,and significantly accelerated reaction rates.Overall,this study demonstrates the ex-cellent catalytic effect of the Mn/carbon black-nickel foam electrode on the degradation of antibiotic pollutants.
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