Fenton-Like Oxidation of Antibiotic Ornidazole Using Biochar-Supported Nanoscale Zero-Valent Iron as Heterogeneous Hydrogen Peroxide Activator

Yanchang Zhang, Lin Zhao, Yongkui Yang and Peizhe Sun
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Yanchang Zhang: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
Lin Zhao: School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
Yongkui Yang: School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
Peizhe Sun: School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China

IJERPH, 2020, vol. 17, issue 4, 1-17

Abstract: Biochar (BC)-supported nanoscale zero-valent iron (nZVI-BC) was investigated as a heterogeneous Fenton-like activator to degrade the antibiotic ornidazole (ONZ). The characterization of nZVI-BC indicated that BC could enhance the adsorption of ONZ and reduce the aggregation of nZVI. Thus, nZVI-BC had a higher removal efficiency (80.1%) than nZVI and BC. The effects of parameters such as the nZVI/BC mass ratio, pH, H 2 O 2 concentration, nZVI-BC dose, and temperature were systematically investigated, and the removal of ONZ followed a pseudo-second-order kinetic model. Finally, possible pathways of ONZ in the oxidation process were proposed. The removal mechanism included the adsorption of ONZ onto the surface of nZVI-BC, the generation of •OH by the reaction of nZVI with H 2 O 2 , and the oxidation of ONZ. Recycling experiments indicated that the nZVI-BC/H 2 O 2 system is a promising alternative for the treatment of wastewater containing ONZ.

Keywords: nanoparticles; biochar; wastewater treatment; ornidazole (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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