Fe/Mn-doped Chlorella biochar for enhanced metronidazole degradation via PMS activation: mechanistic insights into catalytic performance

The catalysis material generated from Chlorella powder modified by metals could activate PMS to generate radicals (SO 4 ˙ − , ˙OH) and non-radical ( 1 O 2 ), resulting in 94.3% degradation of MNZ within 120 min using 0.6 g L −1 catalyst and 1 mM PMS.