Improvement of Floxin photocatalytic degradability in the presence of sulfite: Performance, kinetic, degradation pathway, energy consumption and total cost of system. Issue 12 (2nd December 2022)

• Record Type: Journal Article
• Authors: Rasoulzadeh, Hassan; Alinejad, Abdolazim; Sheikhmohammadi, Amir
• Is Part Of: International journal of environmental health research. Volume 32:Issue 12(2022)
• Page Start: 2781
• Page End: 2797
• Publication Date: 2022-12-02
• Subjects: Advanced oxidation process -- floxin -- sulfite -- uv -- zno; Environmental health -- Periodicals; 363.7
• DOI: 10.1080/09603123.2021.1991283
• Languages: English
• ISSNs: 0960-3123

Abstract

ABSTRACT: In this study, photocatalytic degradability of Floxin antibiotic by UV/ZnO/sulfite (UZS) advanced oxidation process was evaluated. The degradation rate of Floxin antibiotic by UV/ZnO (UZ) and UV alone processes were 30% and 15%, respectively, within 5 min. It was observed sulfite has a synergistic effect on the performance of UZ, as the complete destruction of Floxin was achieved when sulfite was introduced into the photocatalytic medium. The complete degradation of Floxin by UZS was obtained at pH of 12.0, sulfite/ZnO molar ratio of 1:3 after 5 min of reaction. According to kinetic studies, the observed rate of Floxin degradation (robs (mg L −1 min)) by UZS was 63 and 25 times that of UV alone and UZS, respectively. The values of energy consumption and the total cost for UV alone, UZ and UZS processes were estimated to be (50 kWh m −3 and 1.4 $ m −3 ), (20 kWh m −3 and 0.98 $ m −3 ) and (0.78 kWh m −3 and 0.82 $ m −3 ), respectively. Graphical abstract: uf0001