Efficient degradation of tetracycline hydrochloride by photocatalytic ozonation over Bi2WO6

Tong Lu; Yan Gao; Yang Yang; Hongbo Ming; Zhongcheng Huang; Guodong Liu; DanDan Zheng; Jinshui Zhang; Yidong Hou

doi:10.1016/j.chemosphere.2021.131256

Efficient degradation of tetracycline hydrochloride by photocatalytic ozonation over Bi₂WO₆

Chemosphere. 2021 Nov:283:131256. doi: 10.1016/j.chemosphere.2021.131256. Epub 2021 Jun 19.

Authors

Tong Lu¹, Yan Gao¹, Yang Yang¹, Hongbo Ming¹, Zhongcheng Huang², Guodong Liu¹, DanDan Zheng³, Jinshui Zhang¹, Yidong Hou⁴

Affiliations

¹ State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, PR China.
² College of Environment & Resources, Fuzhou University, Fuzhou, 350108, PR China.
³ College of Environment & Resources, Fuzhou University, Fuzhou, 350108, PR China. Electronic address: ddzheng@fzu.edu.cn.
⁴ State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, PR China. Electronic address: ydhou@fzu.edu.cn.

PMID: 34182642
DOI: 10.1016/j.chemosphere.2021.131256

Abstract

Photocatalytic ozonation technique for wastewater treatment has received much attention for their efficient capability in the mineralization of persistent organic pollutants. In this study, nanostructured Bi₂WO₆ was prepared by hydrothermal method and applied in the photocatalytic ozonation process for tetracycline hydrochloride (TCH) degradation under simulated solar light irradiation. Bi₂WO₆ triggered an effective synergy between photocatalysis and ozonation, and it showed a good activity and adaptability in the degradation of organic compounds. Besides, the influence of experimental factors on the total organic carbon removal (including catalyst dosage, ozone concentration, initial pH, reaction temperature and coexisting ions) was also investigated comprehensively. Spin-trapping electron paramagnetic resonance measurements and quenching experiments demonstrated that O₂^-, OH, ¹O₂ and h⁺ contributed to TCH degradation. The possible degradation pathways of TCH were proposed by identifying the intermediates with liquid chromatography-mass spectroscopy.

Keywords: Bi(2)WO(6); Mineralization; Ozonation; Photocatalytic; Tetracycline hydrochloride.

MeSH terms

Catalysis
Ozone*
Tetracycline
Water Pollutants, Chemical* / analysis
Water Purification*

Substances

Water Pollutants, Chemical
Ozone
Tetracycline