Iranian Journal of Ceramic Science & Engineering
Volume 13, Issue 2 (8-2024)
2024, 13(2): 1-18 |
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derakhshandeh M, Farhami N. Kinetic studies and optimization in the photocatalytic degradation of Acid red 52 as an aqueous pollutant by Zinc oxide supported on Bentonite. Iranian Journal of Ceramic Science & Engineering 2024; 13 (2) :1-18
URL: http://ijcse.ir/article-1-985-en.html
URL: http://ijcse.ir/article-1-985-en.html
1- , farhami57@iau.ac.ir
Abstract: (267 Views)
Acid Red 52 is an dye with high global usage that is found in large quantities in textile industry wastewater. In this study, the photocatalytic degradation of Acid Red 52 in water was investigated using a Bentonite-based ZnFe2O4 catalyst in suspension state along with ultraviolet light irradiation in a batch photoreactor. The Scanning electron microscopy (SEM) and X-ray diffraction (XRD) patterns were used to identify the prepared catalyst. The experiments showed maximum photocatalytic activity. The conversion percentage in the presence of ultraviolet light was about 24%, but in the ZnFe2O4 /Bentonite and UV/ZnFe2O4 /Bentonite processes, 9.5 and 98.3% of the pollutant were removed in 120 minutes, respectively. In the study of Langmuir-HenschelWood isotherm models, the model constants kc and Kc were obtained as 0.00849 and 9.24 for the ZnFe2O4/Bentonite catalyst, respectively. Based on the Arrhenius equation, the activation energy and frequency factor values for the AR 52 dye degradation reaction were obtained as 22.307 J/mol.K and 278.3, respectively. Using kinetic studies, the pseudo-first-order reaction rate constant and reaction half-life time were obtained as 0.0397 min-1 and 17.43 min, respectively. The effect of operational factors on photocatalytic degradation such as pH, initial dye concentration, photocatalyst amount and reaction temperature were investigated. Based on these results, a method for photocatalytic decomposition using ZnFe2O4 /Bentonite catalysts was obtained, which can be expanded industrially and used for the decomposition of colored wastewater in textile or other industries.
Keywords: Acid Red 52, Langmuir-Hinschelwood equation, Batch photoreactor, ZnFe2O4 catalyst based on Bentonite, Arhenius Equation.
Type of Study: Research |
Received: 2025/05/12 | Accepted: 2025/10/7
Received: 2025/05/12 | Accepted: 2025/10/7
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