Fe-based catalysts for heterogeneous catalytic ozonation of emerging contaminants in water and wastewater

- Ozone is an efficient oxidant used for degrading organic pollutants.
- Catalysts can improve O3 decomposition to form hydroxyl radicals.
- Fe-based materials is emerging and promising catalysts for catalytic ozonation.
- The preparation and characterization of Fe-based catalysts was summarized.
- Their application for removing toxic organic pollutants was reviewed.

Catalytic ozonation utilizes catalysts to improve the decomposition of ozone and the formation of hydroxyl radicals, which can overcome some disadvantages of ozonation. Fe-based materials are widely used as catalysts for heterogeneous catalytic ozonation due to their easy preparation, excellent catalytic performance and the abundance of Fe in nature. In this paper, the performances of various Fe-based catalysts, including Fe0-derived, FeOOH-derived, Fe2O3-derived, Fe3O4-derived and iron oxides composite, their preparation and characterization methods were briefly introduced. The catalytic ozonation using Fe-based catalysts for the degradation of various emerging contaminants, such as pesticides and herbicides, pharmaceuticals, phthalic acid esters, dyes, nitrobenzenes, phenols, as well as for the treatment of actual wastewater was summarized. The main influencing factors on catalytic ozonation of toxic organic pollutants were discussed, and their potential applications and perspectives were proposed.

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