Tuning Fe-O covalency boosts catalytic ozonation over spinel oxide for chemical industrial wastewater decontamination

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Xu Cao
  • Zhao-Hua Wang
  • Si-Yu Yang
  • Gang Wu
  • Jun Hu
  • Wen-Wei Li
  • Xian-Wei Liu

Detail(s)

Original languageEnglish
Article numbere18569
Journal / PublicationAIChE Journal
Volume70
Issue number11
Online published21 Aug 2024
Publication statusPublished - Nov 2024
Externally publishedYes

Abstract

Heterogeneous catalytic ozonation (HCO) emerges as a promising chemical industrial wastewater treatment solution, offering enhanced ozone utilization and reduced secondary pollutants. However, challenges in scaling HCO arise from a limited understanding of the catalytic mechanisms of metal oxides, particularly in generating active ozone sites. Here, we demonstrated the improvement of catalytic ozonation efficiency by enhancing the covalent bonding between Fe-O in Fe/Co spinel oxides. This alteration exploits the stronger electron-donating capacity of Fe (II), enhancing Fe-O-M bonds and electron enrichment at iron sites, leading to a significant reduction in the activation energy for ozone. Pilot experiments demonstrated a 75.3% COD removal efficiency and a threefold increase in ozone utilization efficiency compared to pure ozone system for chemical industrial wastewater treatment. This study not only advances our understanding of spinel oxides in ozone catalysis but also opens new avenues for practical HCO applications in water treatment. © 2024 American Institute of Chemical Engineers.

Research Area(s)

  • advanced oxidation processes, catalytic ozonation, chemical industrial wastewater, pilot-scale, spinel oxides

Citation Format(s)

Tuning Fe-O covalency boosts catalytic ozonation over spinel oxide for chemical industrial wastewater decontamination. / Cao, Xu; Wang, Zhao-Hua; Guo, Zhi-Yan et al.
In: AIChE Journal, Vol. 70, No. 11, e18569, 11.2024.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review