Work

Efficient removal of estradiol using MnFe2O4 microsphere and potassium persulfate complex salt

Year: 2024

Type: article

Abstract: In this study, MnFe2O4 microspheres were synthesized to activate potassium persulfate complex salt (Oxone) for the degradation of 17β-estradiol (17β-E2) in aqueous solutions. The characteristic of MnFe2O4 was detected by XRD, XPS and SEM-EDS. The experimental results indicated that the degradation of 17β-E2 followed pseudo-first-order kinetics. At 25 °C, 17β-E2 concentration of 0.5 mg/L, MnFe2O4 dosage of 100 mg/L, Oxone dosage of 0.5 mmol/L, and initial pH value of 6.5, the decomposition efficiency of 17β-E2 reached 82.9% after 30 min of reaction. Additionally, free radical quenching experiments and electron paramagnetic resonance analysis demonstrated that SO4−• and •OH participated in the reaction process of the whole reaction system, with SO4−• being the main reactive oxygen species (ROS). The activation mechanism of the MnFe2O4/Oxone/17β-E2 system is proposed as follows: MnFe2O4 initially reacts with O2 and H2O in solution to generate active Fe3+-OH and Mn2+-OH species. Subsequently, Fe3+-OH and Mn2+-OH react with Oxone in a heterogeneous phase activation process, producing highly reactive free radicals. After four cycles of MnFe2O4 material, the removal rate of 17β-E2 decreased by 24.1%.

Source: Scientific Reports

DOI: 10.1038/s41598-024-75781-8