Magnetic biochar derived from dairy manure for peroxymonosulfate activation towards bisphenol A degradation: Kinetics, electron transfer mechanism, and environmental toxicity

Magnetic biochar (MBC) was derived from dairy manure and characterized for understanding the impact of surface characters on PMS activation towards bisphenol A (BPA) degradation. MBC showed high catalytic activity for PMS and kept high catalytic activity under various water matrices. Moreover, the ESR spectra and quenching tests demonstrated that SO4−, OH, and 1O2 were active species for BPA degradation. Electrochemical data indicated that MBC possessed excellent electron transfer property and donated electron from its surface unpaired electron, which enhanced the BPA degradation. Environmental toxicity assay indicated that the toxicity of BPA could be reduced remarkably after MBC-PMS advanced oxidation treatment. Thus, this work will provide a promising strategy to resource agricultural waste and degrade BPA in water treatment.