Influence of the type of photocatalyst on photocatalytic oxidation of triclosan in the aquatic environment
by Piotr Zawadzki; Edyta Kudlek; Mariusz Dudziak
International Journal of Global Environmental Issues (IJGENVI), Vol. 20, No. 1, 2021

Abstract: A comparative assessment of triclosan removal (an antibacterial compound) in aqueous solutions at a concentration of 1.0 mg/dm³ during an advanced oxidation process in the presence of commercial titanium dioxide (TiO₂) and photocatalysts modified with the powdered activated carbon and ultrasounds was studied. Photocatalytic processes were examined using a photocatalyst at the dose concentration of 100 mg/dm³. The influence of photocatalysts modification on triclosan sorption process and its decomposition was found. Triclosan was adsorbed in the range of 69% to 96%. After 20 minutes of the photocatalysis, triclosan decomposition was set to 91% in the presence of pure TiO₂. For the modified photocatalysts, the removal degree exceeded 99% after 10 minutes of irradiation. The Langmuir-Hinshelwood model was used to describe the kinetics of triclosan degradation. Reaction kinetics showed a two-stage oxidation process in the presence of a photocatalyst modified with activated carbon and ultrasounds.

Online publication date: Wed, 19-Jan-2022

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