催化学报

催化学报 ›› 2014, Vol. 35 ›› Issue (1): 1-7.DOI: 10.1016/S1872-2067(12)60724-4

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Wet air oxidation for the decolorization of dye wastewater: An overview of the last two decades

Jie Fua, George Z. Kyzasb,c   

  1. a Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA;
    b Department of Petroleum and Natural Gas Technology, Technological Educational Institute of Kavala, Kavala 65404, Greece;
    c Division of Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
  • 收稿日期:2013-08-21 修回日期:2013-09-17 出版日期:2013-12-23 发布日期:2014-01-17
  • 通讯作者: George Z. Kyzas

Wet air oxidation for the decolorization of dye wastewater: An overview of the last two decades

Jie Fua, George Z. Kyzasb,c   

  1. a Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA;
    b Department of Petroleum and Natural Gas Technology, Technological Educational Institute of Kavala, Kavala 65404, Greece;
    c Division of Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
  • Received:2013-08-21 Revised:2013-09-17 Online:2013-12-23 Published:2014-01-17
  • Contact: George Z. Kyzas
  • Supported by:

    This work was supported by Technological Educational Institute of Kavala (President: A.Ch. Mitropoulos).

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摘要：

Wet air oxidation (WAO), a liquid phase reaction between organic materials in water and oxygen, is one of the most economical and technologically viable advanced oxidation processes for wastewater treatment, particularly toxic and high organic content wastewater. WAO is the liquid phase oxidation of organics or oxidizable inorganic components at elevated temperatures (125-320℃) and pressures (0.5-20 MPa) using gaseous oxygen (or air) as oxidant. In the past two decades, the WAO process was widely studied and applied in the treatment of dye wastewater. Compared to conventional WAO, catalytic WAO processes have higher efficiency and use moderate reaction conditions. The catalysts included homogenous and heterogeneous types. The key points that need to be solved are recycling of homogenous catalysts and better stability of heterogeneous catalysts. In the present review, the technological processes are first introduced, then some research history and hotspots of WAO research are presented, and finally, its application in the treatment of dye wastewater in the past two decades is summarized to reveal the impressive changes in modes, trends, and conditions used. The application includes model pollutant studies and wastewater tests.

关键词: Wet air oxidation, Dye wastewater, Decolorization, Sustainability

Abstract:

Wet air oxidation (WAO), a liquid phase reaction between organic materials in water and oxygen, is one of the most economical and technologically viable advanced oxidation processes for wastewater treatment, particularly toxic and high organic content wastewater. WAO is the liquid phase oxidation of organics or oxidizable inorganic components at elevated temperatures (125-320℃) and pressures (0.5-20 MPa) using gaseous oxygen (or air) as oxidant. In the past two decades, the WAO process was widely studied and applied in the treatment of dye wastewater. Compared to conventional WAO, catalytic WAO processes have higher efficiency and use moderate reaction conditions. The catalysts included homogenous and heterogeneous types. The key points that need to be solved are recycling of homogenous catalysts and better stability of heterogeneous catalysts. In the present review, the technological processes are first introduced, then some research history and hotspots of WAO research are presented, and finally, its application in the treatment of dye wastewater in the past two decades is summarized to reveal the impressive changes in modes, trends, and conditions used. The application includes model pollutant studies and wastewater tests.

Key words: Wet air oxidation, Dye wastewater, Decolorization, Sustainability