Treatment of Petroleum Wastewater Using new Fe-ZSM-5@TiO2/Ag Nano Photocatalyst

مهندسی عمران فردوسی

Volume 34, Issue 2 - Serial Number 34, June 2021, Pages 71-86   

Document Type: Original Article

DOI: 10.22067/jfcei.2021.68412.1011

Authors

Mohammad Delnavaz^* ; Kiarassh Eshaghi

Faculty of Engineering, Civil Engineering Department, Kharazmi University

Abstract

  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%.

Keywords

Nano-photocatalyst; Zeolite; UV lamp; Petroleum wastewater

Supplementary Files

5-delnavaz.pdf

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