Influence of Operational Parameters on Photocatalytic Degradation of Linuron in Aqueous TiO2 Pillared Montmorillonite Suspension

Hadj Bachir, D.;Boutoumi, Hocine;Khalaf, H.;Eloy, Pierre;Gaigneaux, Eric;et.al.
(2021) Bulletin of Chemical Reaction Engineering & Catalysis — Vol. 16, n° 3, p. 673-685 (2021)

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Abstract
TiO2 pillared clay was prepared by intercalation of titan polyoxocation into interlamelar space of an Algerian montmorillonite and used for the photocatalytic degradation of the linuron herbicide as a target pollutant in aque-ous solution. The TiO2 pillared montmorillonite (Mont-TiO2) was characterized by X-ray photoelectron spectrosco-py (XPS), X-Ray diffraction (XRD), X-Ray fluorescence (XRF), scanning electronic microscopy (SEM), thermogra-vimetry and differential thermal analysis (TG-DTA), Fourier transformed infra-red (FT-IR), specific area and po-rosity determinations. This physicochemical characterization pointed to successful TiO2 pillaring of the clay. The prepared material has porous structure and exhibit a good thermal stability as indicated by its surface area after calcination by microwave. The effects of operating parameters such as catalyst loading, initial pH of the solution and the pollutant concentration on the photocatalytic efficiency and COD removal were evaluated. Under initial pH of the solution around seven, pollutant concentration of 10 mg/L and 2.5 g/L of catalyst at room temperature, the degradation efficiency and COD removal of linuron was best then the other operating conditions. It was ob-served that operational parameters play a major role in the photocatalytic degradation process.
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Hadj Bachir, D., Boutoumi, H., Khalaf, H., Eloy, P., Schnee, J., & Gaigneaux, E. (2021). Influence of Operational Parameters on Photocatalytic Degradation of Linuron in Aqueous TiO2 Pillared Montmorillonite Suspension. Bulletin of Chemical Reaction Engineering & Catalysis, 16(3), 673-685. https://doi.org/10.9767/bcrec.16.3.11108.673-685 (Original work published 2021)