UV-assisted nitrogen-doped reduced graphene oxide/Fe3O4 composite activated peroxodisulfate degradation of norfloxacin. Issue 1 (2nd January 2022)

• Record Type: Journal Article
• Authors: Wu, Junfeng; Bai, Jing; Wang, Zhaodong; Liu, Zuwen; Mao, Yanli; Liu, Biao; Zhu, Xinfeng
• Is Part Of: Environmental technology. Volume 43:Issue 1(2022)
• Page Start: 95
• Page End: 106
• Publication Date: 2022-01-02
• Subjects: UV -- NGO-Fe3O4 -- peroxodisulfate -- norfloxacin. degradation kinetics; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/09593330.2020.1779353
• Languages: English
• ISSNs: 0959-3330

Abstract

ABSTRACT: We reported the preparation of NGO-Fe3 O4 by simple hydrothermal-co-precipitation. The catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). It was demonstrated that norfloxacin (NOR) could be effectively degraded by the UV/NGO-Fe3 O4 /PDS system. The degradation efficiency reached 100% within 13 min (the concentration of NOR and S 2 O 8 2 − were 100 mg L −1 and 1 mM, respectively; m(NGO-Fe3 O4 ): m(PDS) = 4: 1; pH: 3.0). In addition, NGO-Fe3 O4 showed stable catalytic activity in recycling. The analysis found that the in-situ generated ·OH was the main active free radicals but SO 4 − ⋅ also participated in the NOR degradation. Based on the identified intermediates, the NOR degradation pathways were proposed with UV/NGO-Fe3 O4 /PDS system. GRAPHICAL ABSTRACT: UF0001