Application, mechanism and prospects of Fe-based/Fe-biochar catalysts in heterogenous ozonation process: A review

A growing number of novel organic contaminants have escalated the demands and challenges for water treat-ment technology. Advanced oxidation processes based on ozone have the advantage of strong oxidative capacity and higher efficiency, which have promising application prospects in the treatment of refractory organic con-taminants. Biochar has attracted a lot of interest in recent years in wastewater treatment owing to its porous structure, portable preparation and outstanding stability. Moreover, iron species are widely used in catalytic ozonation owing to their magnetic polarization, vast abundance and low price. Despite a plethora of research on Fe-based catalysts in ozonation process, the heterogeneous catalytic ozonation with Fe-loaded biochar lacks a comprehensive compendium. This review intends to introduce the research progress on Fe-based catalysts and Fe-loaded biochar in heterogeneous catalytic ozonation progress, summarize and further explore the mechanisms and detection techniques of various active components in catalytic ozonation, as well as providing fresh insights for future research.

Automated summary

An increasing number of novel organic contaminants pose challenges for water treatment technology. Advanced oxidation processes based on ozone offer advantages in treating refractory organic contaminants. Biochar has gained attention in wastewater treatment due to its porous structure, portable preparation, and stability. Iron species are commonly used in catalytic ozonation due to their magnetic polarization, abundance, and low cost. However, there is a lack of comprehensive research on Fe-loaded biochar in heterogeneous catalytic ozonation. This review aims to introduce the progress and explore mechanisms and detection techniques for Fe-based catalysts and Fe-loaded biochar in catalytic ozonation.