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

Author

Listed:
  • 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)

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.

Suggested Citation

  • Yanchang Zhang & Lin Zhao & Yongkui Yang & Peizhe Sun, 2020. "Fenton-Like Oxidation of Antibiotic Ornidazole Using Biochar-Supported Nanoscale Zero-Valent Iron as Heterogeneous Hydrogen Peroxide Activator," IJERPH, MDPI, vol. 17(4), pages 1-17, February.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:4:p:1324-:d:322319
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    Cited by:

    1. Tiao Zhang & Cui Hu & Qian Li & Chuxin Chen & Jianhui Hu & Xiaoyu Xiao & Mi Li & Xiaoming Zou & Liangliang Huang, 2022. "Hydrogen Peroxide Activated by Biochar-Supported Sulfidated Nano Zerovalent Iron for Removal of Sulfamethazine: Response Surface Method Approach," IJERPH, MDPI, vol. 19(16), pages 1-12, August.

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