Catalytic ozonation of sulfamethazine antibiotics using Fe3O4/multiwalled carbon nanotubes. Issue 2 (12th September 2017)

• Record Type: Journal Article
• Authors: Bai, Zhiyong; Yang, Qi; Wang, Jianlong
• Is Part Of: Environmental progress & sustainable energy. Volume 37:Issue 2(2018)
• Page Start: 678
• Page End: 685
• Publication Date: 2017-09-12
• Subjects: antibiotics -- catalytic ozonation -- emerging contaminant -- degradation kinetics -- multi‐walled carbon nanotubes -- sulfamethazine; Environmental engineering -- Periodicals; Sustainable engineering -- Periodicals; Environmental chemistry -- Periodicals; 333.7
• DOI: 10.1002/ep.12737
• Languages: English
• ISSNs: 1944-7442

Abstract

Abstract : Antibiotics are ubiquitous pollutants which cannot be effectively removed by conventional wastewater treatment processes. In this paper, the catalytic ozonation of sulfamethazine (SMT) by Fe3 O4 /multiwalled carbon nanotubes (MWCNTs) was investigated, including the effect of pH on degradation kinetics, mineralization, mechanism of SMT degradation, and ozone utilization. The experimental results showed that Fe3 O4 /MWCNTs catalyzed ozonation could increase the degradation and mineralization of SMT compared with ozonation alone. Acid condition was more favorable to the degradation and mineralization of SMT than neutral or basic conditions. The adsorption of organic pollutants and ozone onto Fe3 O4 /MWCNTs was an important step for SMT degradation. The catalytic ozonation of SMT by Fe3 O4 /MWCNTs was dependent on SMT adsorption, ozone decomposition rate and Fe3 O4 state. The possible degradation pathways for catalytic ozonation of SMT on the surface of Fe3 O4 /MWCNTs were tentatively proposed. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 678–685, 2018