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Degradation of methylene blue by activated peroxymonosulfate by natural mineral fibrous brucite
Activated peroxymonosulfate(PMS) using natural mineral fibrous brucite as a catalytic material was employed for the degradation of methylene blue(MB). XRD, FT-IR, SEM and XPS were used to characterize and analyze the structure of fibrous brucite, it was proven that the surface of fibrous brucite nanofiber structure was rich in hydroxyl and oxygen vacancies. The effects of the dosage of catalyst, PMS concentration, initial pH and reaction temperature on the degradation rate of MB were investigated. The results showed that the degradation rate of MB reached 98.5% in 18 minutes when the initial concentration of MB was 10 mg/L, the initial pH of the solution was 5.6, the temperature was 30 ℃, the dosage of fibrous brucite was 1.0 g/L, and the concentration of PMS was 1.0 mmol/L. The fibrous brucite/PMS system could degrade MB within a wide pH range (3-11). The degradation rate of MB could still reach 83.4% after 5 cycles, indicating good reusability and stability. The system had strong applicability for the removal of dyes, mineral processing reagents, antibiotics and phenols. The results of free radical quenching experiment and electron paramagnetic resonance(EPR) showed that the active species in the fibrous brucite/PMS system were mainly 1O2 and SO4•-.
Degradation of methylene blue by activated peroxymonosulfate by natural mineral fibrous brucite
Activated peroxymonosulfate(PMS) using natural mineral fibrous brucite as a catalytic material was employed for the degradation of methylene blue(MB). XRD, FT-IR, SEM and XPS were used to characterize and analyze the structure of fibrous brucite, it was proven that the surface of fibrous brucite nanofiber structure was rich in hydroxyl and oxygen vacancies. The effects of the dosage of catalyst, PMS concentration, initial pH and reaction temperature on the degradation rate of MB were investigated. The results showed that the degradation rate of MB reached 98.5% in 18 minutes when the initial concentration of MB was 10 mg/L, the initial pH of the solution was 5.6, the temperature was 30 ℃, the dosage of fibrous brucite was 1.0 g/L, and the concentration of PMS was 1.0 mmol/L. The fibrous brucite/PMS system could degrade MB within a wide pH range (3-11). The degradation rate of MB could still reach 83.4% after 5 cycles, indicating good reusability and stability. The system had strong applicability for the removal of dyes, mineral processing reagents, antibiotics and phenols. The results of free radical quenching experiment and electron paramagnetic resonance(EPR) showed that the active species in the fibrous brucite/PMS system were mainly 1O2 and SO4•-.
Degradation of methylene blue by activated peroxymonosulfate by natural mineral fibrous brucite
ZHANG Baqun (Autor:in) / LUO Xianping (Autor:in) / TANG Xuekun (Autor:in) / WU Yaoyao (Autor:in) / YU Sihao (Autor:in) / XIONG Yuting (Autor:in)
2025
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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