Fe-Mn Biochar Composites from Sugarcane Bagasse for Herbicides Removal: Structure, Mechanisms, and Safety Relationships toward Sustainable Water Treatment.

ABSTRACT: Fe-Mn biochar composites were synthesized from sugarcane bagasse through prepyrolytic impregnation with FeCl₃ and MnCl₂, using immersion (IME) and coprecipitation (COP) methods, followed by pyrolysis at 600 °C for 2 h. Their characterization revealed distinct differences in surface chemistry and oxide dispersion. Both composites contained mixed Fe₃O₄, Fe₂O₃, MnO, and Mn₃O₄ phases, but IME exhibited a amorphous carbon matrix, while COP displayed greater crystallinity (∼41%). In aqueous adsorption studies, IME maintained nearly constant removal efficiency across pH 2-10, whereas COP was strongly pH-dependent, leading to IME's selection for subsequent studies. Adsorption isotherms of 2,4-dichlorophenoxyace

SUBMITTER: Ferreira Souza T 

PROVIDER: S-EPMC12903173 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature