عنوان مقاله [English]
Petroleum wastewater contains a wide range of hard biodegradable pollutants that are not treated by conventional treatment methods. In this study, the photocatalytic degradation of organic pollutants in the wastewater of Petroleum were investigated using new Fe-ZSM-5@TiO2/Ag synthetic nano-photocatalyst. Synthesis of nano photocatalyst was done by immobilizing iron on zeolite to improve ZSM-5 structure and then TiO2 and Ag coated to reduce the band gap energy. Physical and chemical properties of the materials determined by XRD, SEM, FT-IR and BET analyzes. TiO2 in the anatase phase was shown in synthetic nano-photocatalyst using XRD analysis. The uniformity of the nanoparticles was also revealed in the SEM images, which showed that the TiO2 and Ag particles were well located on the surface of Fe-ZSM-5. Experimental procedure was done using experimental method by response surface method (RSM). The effects of main parameters containing pollutant concentration, photocatalyst nanoparticle concentration, pH, reaction time, radiation wavelength and different photocatalysts were performed in a batch pilot. The results showed that at pH=5 and the photocatalyst concentration of Fe-ZSM-5@TiO2/Ag equal to 2 g/L under UV-A irradiation at 54 watts and 240 min time the best COD removal performance was about 83%.