2O 3-based CoFe 2O 4 for the degradation of sulfachloropyridazine sodium: Kinetics and mechanism]]>

摘要

Graphical abstractDisplay OmittedHighlights?CoFe2O4/Al2O3were synthesized for the first time.?Degradation kinetics of sulfachloropyridazine were evaluated by CoFe2O4/Al2O3+PMS.?Impacts of different conditions including pH and PMS dosage were discussed.?Different scavengers including TBA, MeOH, NOM and anions were investigated.?The degradation mechanism of sulfachloropyridazine was proposed.AbstractAl2O3-based CoFe2O4(CoFe2O4/Al2O3) as a catalyst was prepared to activate peroxymonosulfate (PMS) for degradation of sulfachloropyridazine (SCP). In general, the catalytic performance of CoFe2O4/Al2O3in activation PMS was demonstrated more effective than CoFe2O4. Several influence factors were inspected, including scavengers, PMS concentration, pH, anions, nature organic matter (NOM) and temperature. The oxidation of SCP fitted a pseudo-first-order kinetics model and was efficient with the pH from 5.00 to 8.00. The influence of scavengers demonstrated thatSO4-·played a more significant role thanHO·in the oxidation process. The removal was strongly inhibited by adding NOM orHCO3-