Influence of parameters and radical scavengers on the visible-light-induced degradation of ciprofloxacin in ZnO/SnS 2 nanocomposite suspension: Identification of transformation products.

Autor: Makama AB; Department of Chemical Engineering Technology, The Federal Polytechnic, Nasarawa, P.O. Box 01, 962101, Nigeria., Salmiaton A; Sustainable Process Engineering Research Centre, Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor Darul Ehsan, Malaysia. Electronic address: mie@upm.edu.my., Choong TSY; Sustainable Process Engineering Research Centre, Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor Darul Ehsan, Malaysia., Hamid MRA; Sustainable Process Engineering Research Centre, Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor Darul Ehsan, Malaysia., Abdullah N; Sustainable Process Engineering Research Centre, Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor Darul Ehsan, Malaysia., Saion E; Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Darul Ehsan, Malaysia.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2020 Aug; Vol. 253, pp. 126689. Date of Electronic Publication: 2020 Apr 10.
DOI: 10.1016/j.chemosphere.2020.126689
Abstrakt: Removal of ciprofloxacin (CIP) pollutant from wastewater using conventional process is particularly challenging due to poor removal efficiency. In this work, CIP was photocatalytically degraded using a porous ZnO/SnS 2 photocatalyst prepared via microwaves. The influence of process parameters (e.g., pH, catalyst mass and initial CIP concentration) and radical scavengers on visible-light induced degradation of CIP on the catalyst was investigated. From the study, it was found that visible-light induced degradation of CIP on ZnO/SnS 2 is a surface-mediated process and the reaction kinetics followed the Langmuir-Hinshelwood first-order kinetics. It was found that the optimum condition for CIP degradation was at pH of 6.1 and catalyst dosage of 500 mg L -1 . Higher catalyst dosage however led to a decline in reaction rate due to light scattering effect and reduction in light penetration.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: