Repository of Research and Investigative Information

Repository of Research and Investigative Information

Kurdistan University of Medical Sciences

Enhanced sonocatalysis of textile wastewater using bentonite-supported ZnO nanoparticles: Response surface methodological approach

(2016) Enhanced sonocatalysis of textile wastewater using bentonite-supported ZnO nanoparticles: Response surface methodological approach. Journal of Environmental Management.

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The scope of this study was the use of bentonite as the carrier of ZnO nanoparticles for enhancing the sonocatalytic decolorization of Basic Red 46 (BR46) in the aqueous phase. The results demonstrated the higher sonocatalytic activity of bentonite-supported ZnO nanoparticles (BSZNs) in comparison with the suspended ZnO nanoparticles (SZNs). The particle size of BSZNs (5-40 nm) was lower than that of SZNs (20-120 nm). Due to the immobilization of ZnO nanoparticles, a specific surface area of 80.6 m2/g was obtained for the BSZNs, which was higher than the specific surface area of the raw bentonite (42.2 m2/g). Optimization of the process via response surface methodology (RSM) based on central composite design (CCD) showed the maximum sonocatalytic decolorization efficiency () of 89.92 in which the initial dye concentration, the ZnO/bentonite ratio, the sonocatalyst dosage, and the initial pH were 6 mg/L, 0.3, 2.5 g/L and 9, respectively. The byproducts generated during the sonocatalysis of BR46 over BSZNs were identified using gas chromatography-mass spectrometry (GC-MS) analysis. From an application viewpoint, the sonocatalysis of real textile wastewater resulted in a COD removal efficiency () of about 44 within a reaction time of 150 min. © 2016 Elsevier Ltd.

Item Type: Article
Keywords: bentonite; zinc oxide nanoparticle; azo compound; basic red 46; bentonite; nanoparticle; waste water; zinc oxide, bentonite; catalysis; catalyst; dye; immobilization; inorganic compound; methodology; nanoparticle; optimization; particle size; wastewater, Article; catalysis; catalyst; central composite design; chemical oxygen demand; decolorization; experimental design; immobilization; mass fragmentography; particle size; pH; reaction time; response surface method; sonocatalysis; surface area; textile; waste water; catalysis; chemistry; procedures; sewage; textile industry; ultrasound; waste water, Azo Compounds; Bentonite; Catalysis; Nanoparticles; Textile Industry; Ultrasonics; Waste Disposal, Fluid; Waste Water; Zinc Oxide
Page Range: pp. 47-57
Journal or Publication Title: Journal of Environmental Management
Volume: 179
Publisher: Academic Press
Identification Number: 10.1016/j.jenvman.2016.05.001
ISSN: 03014797
Depositing User: مهندس جمال محمودپور

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