Estudo da degradação dos fármacos Diclofenaco de Potássio E Ibuprofeno via processos oxidativos avançados fotoassitidos por luz UV

Abstract

This work shows the development of a coupled system for the Potassium Diclofenac and Ibuprofen degradation using different advanced oxidation processes (AOPs), including sonolysis, photolysis, Fenton and photo-Fenton. Considering the search for better experimental conditions, a 23 factorial design with a triplicate at central point was applied, and the best parameters combination was determined, being the system evaluated for catalytic efficiency and sustainability. The variables studied were H2O2 volume, catalyst mass and pharmaceuticals concentration. Mercury 125 W and LED 50 W lamps were used as radiation sources to verify efficiency regarding light emissivity and irradiation. The pharmaceuticals degradation kinetics were evaluated by the absorbance decay and monitored by UV-vis spectrometry. In the optimization of degradation variables, the photo-Fenton process presented the highest degradation efficiency compared to the other AOPs, achieving pharmaceuticals concentration removal rates above 95%. The photo-Fenton process was applied in the pharmaceuticals Degradation in tap water sample, showing a high removal rate of DP and IB. This study contributes to the development of more efficient and sustainable technologies for the wastewater treatment containing several classes of pharmaceuticals.