Progress in the Application of Iron-Based Plant Derived Biochar Catalyst for Fenton-like Remediation of Organic Wastewater: A Review

Abstract

This paper focuses on the research progress of iron-based plant-derived biochar in the field of Fenton-like organic wastewater treatment. Given the severe organic pollution problems in water bodies, advanced oxidation technologies have garnered significant attention. In Fenton-like reactions, iron-based catalysts play a crucial role but have limitations, while the characteristics of biochar make it an ideal carrier. This paper provides a detailed account of the preparation methods for iron-based plant-derived biochar, including one-step pyrolysis and co-precipitation methods, each with its own advantages and disadvantages. It introduces the application of iron-based plant-derived biochar in Fenton-like reactions, including single-metal, multi-metal, and composite material forms, and explains the activation mechanisms involving radical and non-radical pathways. Finally, it summarizes the advantages of this material and points out the need for further research in areas such as cost assessment, metal leaching, practical water body application, and intermediate product toxicity assessment, providing comprehensive references and directional guidance for future studies.