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Fabrication of Surfactant-Enhanced Metal Oxides Catalyst for Catalytic Ozonation Ammonia in Water

Author

Listed:
  • Chen Liu

    (Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Jiangxi University of Science & Technology, Ganzhou 341000, China)

  • Yunnen Chen

    (Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Jiangxi University of Science & Technology, Ganzhou 341000, China)

  • Lin Guo

    (Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Jiangxi University of Science & Technology, Ganzhou 341000, China)

  • Chang Li

    (Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Jiangxi University of Science & Technology, Ganzhou 341000, China)

Abstract

The new surfactant-enhanced metal oxides composite catalysts have been prepared using solid state method and characterized by the N 2 -adsorption-desorption, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscope (TEM), and X-ray diffraction (XRD) techniques. Catalytic activity of the synthesized powders has been investigated in the liquid-phase catalytic ozonation ammonia nitrogen (NH 4 + ) (50 mg/L). Especially, the effect of parameters such as optimum molar ratio for metal salt, NaOH and surfactants, temperature, and time of calcinations was also considered. Leveraging both high catalytic activity in NH 4 + degradation and more harmless selectivity for gaseous nitrogen, the CTAB/NiO catalyst is the best among 24 tested catalysts, which was generated by calcining NiCl 2 ·6H 2 O, NaOH, and CTAB under the molar ratio 1:2.1:0.155 at 300 °C for 2 h. With CTAB/NiO, NH 4 + removal rate was 95.93% and gaseous nitrogen selectivity was 80.98%, under the conditions of a pH of 9, ozone flow of 12 mg/min, dosage of catalyst 1.0 g/L, reaction time 120 min, and magnetic stirring speed 600 r/min in room temperature.

Suggested Citation

  • Chen Liu & Yunnen Chen & Lin Guo & Chang Li, 2018. "Fabrication of Surfactant-Enhanced Metal Oxides Catalyst for Catalytic Ozonation Ammonia in Water," IJERPH, MDPI, vol. 15(8), pages 1-15, August.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:8:p:1654-:d:161889
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    References listed on IDEAS

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    1. Ibendahl, Gregory & Fleming, Ronald A., 2007. "Controlling aquifer nitrogen levels when fertilizing crops: A study of groundwater contamination and denitrification," Ecological Modelling, Elsevier, vol. 205(3), pages 507-514.
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