Using BiOI to simultaneously remove ciprofloxacin, levofloxacin antibiotic in water was studied. Factors affecting the photocatalytic ability of BiOI, such as the dosage of BiOI catalyst (0.2 - 1.5 g/L), initial concentration (1-5 mg/L), reaction temperature (25 - 50°C) was assessed. In addition, the stability of BiOI catalyst during the treatment of ciprofloxacin and levofloxacin was also studied. The results showed that the BiOI can remove ciprofloxacin and levofloxacin under visible light conditions. In an optimal condition (BiOI dosage 1 g/L; ciprofloxacin, levofloxacin initial concentration 1.5 mg/L; reaction temperature 25°C; and reaction time 60 minutes) the removal efficiency of ciprofloxacin, levofloxacin were 98.7 %, 99.1 %, respectively. The results also found that after 6 times of reuse, the removal efficiency of BiOI for ciprofloxacin, levofloxacin antibiotic were 98 % and 98.5 %. Therefore, BiOI materials can be used for the treatment of antibiotic residues in water at visible light conditions.
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