Degradation of Ciprofloxacin by Activating Peroxymonosulfate with Sludge Biochar

• Published in: Huanjing kexue Vol. 44; no. 12; p. 6801
• Main Authors: Zheng, Da-Yang, Zou, Jia-Li, Xu, Hao, Wang, Teng, Shi, Yu-Xiang, Chen, Yong-Jian, Li, Bin-Yang, Wang, Ya-Yi, Feng, Cang, Wu, Min
• Format: Journal Article
• Language: Chinese
• Published: China 08.12.2023
• Subjects: non-radical; radical; peroxymonosulfate(PMS); sludge biochar; ciprofloxacin
• ISSN: 0250-3301
• DOI: 10.13227/j.hjkx.202211264

Sludge biochar(BC), which was prepared by the pyrolysis of waste-activated sludge at 450℃, was applied for peroxymonosulfate(PMS) activation to construct a BC/PMS system for ciprofloxacin(CIP) degradation. The physical and chemical properties of BC were studied using scanning electron microscopy(SEM), an energy dispersive spectrometer(EDS), a Fourier transform infrared spectrometer(FTIR), X-ray diffraction(XRD), a Zeta potential analyzer, and electron paramagnetic resonance spectroscopy(EPR). The effects of BC dosage, PMS dosage, initial pH value, and inorganic anions on CIP removal in the BC/PMS system were investigated. Further, the degradation mechanism of the BC/PMS system was speculated through the free radical quenching experiment and X-ray photoelectron spectroscopy(XPS) analysis. The results showed that the CIP degradation rate was 49.09% at a BC dosage of 1.0 g·L , PMS of 3.0 mmol·L , CIP of 20 mg·L , and pH of 6.0 in 120 min. SO and NO had no obvious effect on the removal of CIP in the BC/PMS system