Activation of peroxymonosulfate by in situ MgSiO3-Cu assembly catalyst for ciprofloxacin degradation in solution contaminated with ciprofloxacin and Cu2+

Abstract

Herein, magnesium silicate particles were used as the carrier to develop an advanced oxidation technology predicated on in-situ assembled Cu-based catalysts for treating wastewater contaminated with ciprofloxacin(CIP) and Cu²⁺ complexes. The results show that the synthesized MgSiO₃ has an amorphous structure with good cation exchange capacity for simultaneous Cu²⁺ removal to in situ assembly MgSiO₃-Cu catalyst and ciprofloxacin degradation in the mixture wastewater. The MgSiO₃-Cu/Peroxymonosulfate(PMS) Fenton-like system exhibited the highest CIP removal ability with the initial pH = 7.0, PMS dosage of 0.06 g/L, and MgSiO₃-Cu dosage of 0.4 g/L, and the CIP removal rate could reach up to 98 %. The possible degradation mechanism of CIP leads to a redox cycle between Cu (I) and Cu (II), resulting in the generation of hydroxyl radicals (•OH) and superoxide anions ($·O_2^{-}$).