Fast degradation of florfenicol in SiC-Fe0 Fenton-like process: The overlooked role of atomic H* in peroxymonosulfate activation

•The silicon carbide alleviated the oxidation of Fe0 and increased its electron transfer rate.•Atomic hydrogen played an important role in peroxymonosulfate activation.•Florfenicol was mainly destructed by the singlet oxygen mediated non-radical processes.•The generation mechanisms of different reactive oxygen species were investigated.