Golestan University of Medical Sciences Repository

Degradation of metronidazole in aqueous solution by nano-ZnO/UV photocatalytic process

Farzadkia, M. and Esrafili, A. and Baghapour, M.A. and Shahamat, Y.D. and Okhovat, N. (2014) Degradation of metronidazole in aqueous solution by nano-ZnO/UV photocatalytic process. Desalination and Water Treatment, 52 (25-27). pp. 4947-4952. ISSN 19443994 (ISSN)

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Abstract

In this study, the effects of some operational factors, such as pH value, nano-ZnO loading, UV-A irradiation time, and power of radiation on the degradation efficiency of metronidazole (MNZ) in aqueous solution were discussed through photocatalytic experiments using nano-ZnO as the photocatalyst. Results show that removal of metronidazole (MNZ) and COD has a direct correlation with power of UV-A lamp and irradiation time. MNZ solution (80 mg L⁻¹) was rapidly removed by the irradiation of UV lamp OSRAM 125 W high pressure within 180 min. In nano-ZnO/UV photocatalysis reactor, irradiation time and power of UV lamp have a great effect on metronidazole degradation. Statistical analysis (One-way ANOVA) has shown that the pH (in acedic and basic condition) and variation of nano-ZnO concentration has no significant effects on MNZ removal, COD, and BOD5/COD ratio. But the maximum degradation of MNZ occurred at pH 10 and 1.5 gL⁻¹ nano-ZnO. Maximum degradation of MNZ and COD was 96.55 and 95.42%, respectively. In addition, biodegradability improved from ∼0 to 0.091 within 180 min. © 2013 Balaban Desalination Publications. All rights reserved.

Item Type: Article
Additional Information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Desalin. Water Treat. [Field not mapped to EPrints] AD - Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran [Field not mapped to EPrints] AD - Center for Solid Waste Research (CSWR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran [Field not mapped to EPrints] AD - Department of Environmental Health Engineering, Shiraz University of Medical Sciences, Shiraz, Iran [Field not mapped to EPrints] AD - Environmental Health Research Center, Golestan University of Medical Sciences, Gorgan, Iran [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled Keywords: Metronidazole, Nano-ZnO/UV, Photocatalysis, aqueous solution, biodegradation, catalysis, chemical oxygen demand, concentration (composition), photochemistry, ultraviolet radiation
Subjects: مقالات نمایه شده محققین دانشگاه در سایت ,Web of Science ,Scopus
Divisions: معاونت تحقیقات و فناوری
Depositing User: GOUMS
Date Deposited: 18 Apr 2015 03:45
Last Modified: 17 Jan 2017 10:46
URI: http://eprints.goums.ac.ir/id/eprint/1740

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