摘要
A 3D flower-like CoMn 2 O 4 catalyst was synthesized via hydrothermal-calcination technique as peroxymonosulfate (PMS) activator for the remediation of pharmaceuticals, exemplified by antibiotics tetracycline (TC) in aqueous solutions. TC degradation in the CoMn 2 O 4 -PMS system took place over a broad pH range of 5 to 9. Different water matrices (tap water and lake water) did not affect the efficiency of CoMn 2 O 4 /PMS system. Multiple uses of CoMn 2 O 4 did not alter the surface properties and catalytic TC degradation efficiency. The dissolution of component metal ions was below the allowable drinking water standard. Carbon oxidation state was increased from −0.51 to 1.2, indicating high degree of mineralization. Non-radical, specifically singlet oxygen, and radical, namely, hydroxyl and sulfate radical, contributed 30.6% and 68.4% to TC degradation, respectively. The CoMn 2 O 4 -PMS system was efficient in the degradation of several pharmaceuticals, including tetracycline, SMX, Cipro CIP and BPA.