Performance study of Fe-TiO2 Tubular Photocatalytic Membranes on Alumina Support for Separation of Dye Pollutant from Aqueous Solution

Document Type : Research paper

Authors

1 Tabriz Branch, Islamic Azad University

2 Department of chemical engineering,Tabriz Branch, Islamic Azad University,Tabriz, Iran

Abstract

Objective: Dyes, ,as environmental contaminants,, impact for the entire ecosystem and the human beings. Hence, it is essential to separate from dye effluents. Several technologies were investigated for separation and degradation of dye contaminate that photocatalytic membrane are an appropriate candidate due to the multiple action such as rejection and photodegradation of dye contaminates.
Method: The Fe doped TiO2 photocatalyst layer was coated on the tubular ceramic support by dip coating method, while the photocatalyst layer was synthesized by sol gel method. The synthesized membrane was characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Malachite green (MG) as a dyes contaminants was adopted to test the photocatalytic performance of prepared membrane. Different parameters that affected dye contaminate removal and flux of prepared composite membrane were discussed, including pH, initial concentration of dyes contaminants (C0), light source, and transmembrane pressure (ΔP).
Results: The structural properties confirmed that the photocatalytic membranes layer were successfully prepared on ceramic support. The results recommend that the degradation of pollutants was favored at a low initial concentration, the alkaline condition under UV irradiation. The pH of the initial solution was not affected on permeate flux. The permeate fluxes of the synthesized membrane were increased at high trans membrane pressure (ΔP).
Conclusion: The optimized parameters were found to be the working solution pH=9 and C0=5 ppm, ΔP=1 bar under UV irradiation. The addition of Fe to TiO2 photocatalyst enabled the composite membrane to possess visible-light photo catalysis and ultrafiltration simultaneously.

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References

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Journal of Separation Science and Engineering
Volume 17, Issue 1
June 2025
Pages 37-54

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