Deciphering the fate of antibiotic resistance genes in norfloxacin wastewater treated by a bio-electro-Fenton system

•Bio-electro-Fenton systems removed NFLX reached 79.8 % in 48 h reaction time.•The change of NFLX concentration can affect the potential of the anode and cathode.•Actinobacteria may be more resistant to antibiotics.•The ko02010 pathway upregulated with the addition of NFLX.•The antibiotic resistance mechanisms varied strongly for diverse bacterial species.