Degradation of Ceftriaxone from aquatic solution using a heterogeneous and reusable O3/UV/ Fe3O4@TiO2 systems: operational factors, kinetics and mineralisation

• Published in: International journal of environmental analytical chemistry 2022-12, Vol.102 (18), p.6904-6920
• Main Authors: Hashemi, Seyed Yaser, Yegane Badi, Mojtaba, Pasalari, Hasan, Azari, Ali, Arfaeinia, Hossein, Kiani, Amin
• Format: Article
• Language: English
• Subjects: @TiO; Advanced oxidation process; Antibiotics; Aqueous solutions; Catalysts; catalytic oxidation; Ceftriaxone; Chemical properties; Chemicophysical properties; Composite materials; Decontamination; Degradation; Dosage; Electron microscopy; Fourier transforms; Infrared spectra; Infrared spectroscopy; Iron oxides; Kinetics; Magnetometers; Microscopy; Mineralization; Optimization; Organic carbon; ozonation; Ozone; pH effects; Photocatalysis; Photodegradation; Removal; Scanning electron microscopy; Titanium dioxide; Total organic carbon; Transmission electron microscopy; Ultraviolet radiation; X-ray diffraction
• ISSN: 0306-7319; 1029-0397
• DOI: 10.1080/03067319.2020.1817909

The present study was developed to evaluate and optimise catalytic oxidative degradation of Ceftriaxone (CTX) from aqueous solution using heterogeneous O 3 /UV/Fe 3 O 4 @TiO 2 systems. The performance of combined system O 3 /UV/Fe 3 O 4 @TiO 2 was examined as a function of operational parameters including catalyst dosage, solution pH, initial concentration and ozone concentration in a batch system. Physical and chemical properties of the catalyst composite materials were characterised using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectra and vibrating sample magnetometer. A high removal efficiency of CTX (92.40%) and total organic carbon (TOC) reduction (72.5%) were obtained under optimum conditions, i.e. (time: 30 min, photocatalyst dosage: 2 g/L, pH: 9, initial CTX concentration: 10 mg/L and ozone dosage: 0.2 g/h). The high removal efficiency of CTX and TOC after six consecutive catalyst uses proved the excellent reusing potential of Fe 3 O 4 @TiO 2 . Quenching experiments confirmed that OH° played major roles compared with h+ and O 2 − in photocatalytic degradation of CTX. Integration of O 3 /UV/Fe 3 O 4 @TiO 2 exhibited an excellent performance into CTX removal over 30 min reaction, which can be considered as a promising and effective technique for the decontamination of polluted waters.