Photocatalytic degradation of cephalexin by Ag/Ag2O/TiO2 catalyst thin film in a spinning disc reactor
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1Process Intensification Laboratory, Department of Chemical Engineering, Yasouj University, Yasouj 75918-74831, Iran
2Department of Chemistry, Yasouj University, Yasouj 75918-74831, Iran
This study investigated the photodegradation of cephalexin (CPX) using a spinning disc photocatalytic reactor (SDPR). To this end, visible light-activated Ag/Ag2O/TiO2 thin film was immobilized on a ceramic disc by the sol-gel spin coating method. The response surface methodology (RSM) on the basis of the central composite design (CCD) was utilized to evaluate the impact of the operational factors (e.g. illumination duration, rotational speed, solution flow rate, and initial CPX concentration) on the efficiency of CPX photodegradation. The removal efficiency in optimal conditions for CPX was obtained 96.06% upon implementing the following conditions: illumination time: 60 min, the rotational speed: 215 rpm, the solution flow rate: 0.6 L/min, and initial CPX concentration: 30 mg/L.