Photodestruction of Direct Yellow 11 in aqueous TiO2 suspension: effect of operational parameters on detoxification, Langmuir–Hinshelwood kinetic expression and biodegradability

Khezrianjoo, Sajjad

doi:10.5004/dwt.2019.23766

Cited by 2 publications

(1 citation statement)

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“…The containers were incubated for 72 h in a dark growth chamber at ambient temperature and 90% relative humidity. The germination index percentage (GI%) was used to record the percentage of germination [49]:…”

Section: Eco-toxicological Evaluationsmentioning

confidence: 99%

Eco-Toxicological and Kinetic Evaluation of TiO2 and ZnO Nanophotocatalysts in Degradation of Organic Dye

et al. 2019

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In this study, the photocatalytic degradation of azo dye “Food Black 1” (FB1) was investigated using TiO2 and ZnO nanoparticles under ultraviolet (UV) light. The performances of the two photocatalysts were evaluated in terms of key parameters (e.g., decolorization, dearomatization, mineralization, and detoxification of dye) in relation to variables including pre-adsorption period, pH, and temperature. Under acidic conditions (pH 5), the ZnO catalyst underwent photocorrosion to increase the concentration of zinc ions in the system, thereby increasing the toxic properties of the treated effluent. In contrast, TiO2 efficiently catalyzed the degradation of the dye at pH 5 following the Langmuir–Hinshelwood (L–H) kinetic model. The overall results of this study indicate that the decolorization rate of TiO2 on the target dye was far superior to ZnO (i.e., by 1.5 times) at optimum catalyst loading under UV light.

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Section: Eco-toxicological Evaluationsmentioning

confidence: 99%