Опубликована: Янв. 1, 2024

Membrane fouling has been a major factor hindering the development of ultrafiltration membranes. Herein, novel in situ oxidation system was constructed via MnFe2O4/MWCNTs introduced into PVDF membranes with sunlight to synergistically activate PMS mitigate membrane fouling. The mechanism mitigating MnFe2O4/MWCNTs-PVDF systematically explored under four (single filtration, single irradiation, and irradiation PMS). catalytic exhibited different characteristics systems, among which synergistic activated oxidative filtration possessed highest HA removal efficiency 90.2%, as well lowest Rr (0.2108 ×1012m-1) Rir (0.4525×1012m-1). To further evaluate practicality effectiveness sunlight-MnFe2O4/MWCNTs-PMS system, secondary effluent selected verify treatment effect on NOM natural water. By observing microscopic morphology fouled surface, it can be seen that compared other three filter cake layer surface obviously reduced, structure more loose. It conclued principle alleviate accelerate mineralization rate molecules, oxidize smaller particle size pass through pores, reduce probability its plugging pores. main reactive oxygen species degradation activation were revealed by electron paramagnetic resonance (EPR) analysis density functional theory calculations (DFT). results showed combination free radicals (·O2−、SO4·− ·OH) non-free (1O2). All things considered, in-situ provided an alternative way

Язык: Английский