Immobilization of Fe3O4/TiO2 nanocomposite thin layer on the glass tubes in a component parabolic collector for the treatment of DR23
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Photocatalysis driven by the natural solar light has been proved to be a favorable approach for the degradation of hazardous organic pollutants in water and wastewater. The present work addressed the removal of Direct Red 23 by the solar/Fe3O4/TiO2/S2O82− process. The application of the component parabolic collector, which served as a solar light concentrator, could improve the photocatalytic removal efficiency in the presence of immobilized Fe3O4/TiO2 nanoparticles. In this paper, the synthesis of Fe3O4/TiO2 photocatalyst to treat wastewater under solar radiation has been reported. Accordingly, a component parabolic collector solar photoreactor was designed and constructed for wastewater treatment processes. The prepared Fe3O4/TiO2 nanocomposite was precipitated as a thin layer on the glass tubes of the solar photoreactor. The central composite experimental design was also used in order to optimize and model the CI Direct Red 23 decolorization process; then, the influence of operational parameters such as the contaminant concentration, S2O82− concentration, and the reaction time was investigated. Due to the solar/Fe3O4/TiO2/S2O82− process, 100% of Direct Red 23 could be removed in 90 min at the concentration of 15.16 mg L−1 and S2O82− concentration of 0.8 mM. The predicted response for the Direct Red 23 decolorization efficiency in the optimal condition was obtained to be 98.50%, which was in a good agreement with the experimental response (100%).
KeywordsDegradation Optimization Photocatalysis Photoreactor
The authors wish to thank all who assisted in conducting this work.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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