An Efficient Strategy for Enhancing the Adsorption Capabilities of Biochar via Sequential KMnO4-Promoted Oxidative Pyrolysis and H2O2 Oxidation

In this study, sequential KMnO4-promoted oxidative pyrolysis and H2O2 oxidation were employed to upgrade the adsorption capacities of durian shell biochar for methylene blue (MB) tetracycline (TC) in an aqueous solution. It was found that KMnO4/H2O2 co-modification greatly influenced by temperature optimal 300 °C. Moreover, a low concentration enabled improvement capabilities with catalysis pre-impregnated manganese oxides, addressing shortcoming single modification. The co-modified exhibited high MB TC, remarkably surpassed KMnO4- H2O2- modified biochars as well pristine biochar. increase could be mainly contributed incorporation MnOx carboxyl decomposition Mn-catalyzed oxidation. This would provide novel efficient method preparing highly adsorptive using