Document Type: ORIGINAL RESEARCH PAPER

Authors

1 Student Research Committee, Qom University of Medical Sciences, Qom, Iran.

2 Research Center for Environmental Pollutants, Qom University of Medical Sciences, Qom, Iran

3 Cellular and Molecular Research Center, Qom University of Medical Sciences, Qom, Iran

Abstract

Ciprofloxacin antibiotic that is used to cure several kinds of bacterial infections have a high solubility capacity in water. The influent of ciprofloxacin to water resources in a low concentration affect the photosynthesis of plants, transforms the morphological structure of the algae, and then disrupts the aquatic ecosystem. 75% of this compound is excreted from the body down to the wastewater which should be removed. BiFeO3, a bismuth-based semiconductor photocatalyst that is responsive to visible light, has been recently used to remove organic pollutants from water. In this study, the optimal conditions for removing ciprofloxacin from aqueous solutions by the BiFeO3 process were investigated. Effective parameters namely pH, reaction time, ciprofloxacin initial concentration, BiFeO3 dose, and temperature on ciprofloxacin removal were studied by using response surface methodology. The validity and adequacy of the proposed model was confirmed by the corresponding statistics (i.e. F-values of 14.79 and 1.67 and p-values of 2 = 0.9107, R2adjusted = 0.8492, R2 predicted = 0.70, AP = 16.761). Hence the Ciprofloxacin removal efficiency reached 100% in the best condition (pH 6, initial concentration of 1 mg/L, BiFeO3 dosage of 2.5 g/L, reaction temperature of 30° C, and process time of 46 min).

Graphical Abstract

Highlights

  • The most effective parameter in CIP removal was the BFO dosage with the highest positive effect;
  • The best conditions for cefexime removal was:  pH 6, initial concentration of 1 mg/L, BiFeO3 dosage of 2.5 g/L, reaction temperature of 30°C, and process time of 46 minutes;
  • BiFeO3 nanocomposites can be successfully employed to remove ciprofloxacin antibiotic from aqueous environments.

Keywords

Main Subjects

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