Research progress on the treatment of phenol containing wastewater by heterogeneous catalyst ozonation

Abstract

Catalytic ozonation process has the advantages of simple operation，high oxidation efficiency and low secondary pollution in the advanced treatment of phenol containing organic wastewater. However，its large-scale application depends on the development of heterogeneous catalysts with high activity and stability. Herein，the mechanism of hetergeneous catalytic ozone oxidation reaction in catalytic ozonation technology was introduced. The research status of heterogeneous catalysts for catalytic ozonation of phenolic compounds was reviewed from two aspects of non-supported and supported catalysts，and the characteristics and limitations of non-supported catalysts，single active component supported catalysts and multi-component supported catalysts were mainly analyzed. Multi-component supported catalyst is the main research object since its advantages on improving ozone utilization rate，reducing ozone emission and great potential of performance optimization. To develop highly efficient catalysts，the optimization strategy on composition，size and defect site of catalyst was proposed from the perspective of geometric structure and electronic structure. Finally，the research progress of heterogeneous catalytic ozonation catalysts for removal of phenolic compounds was summarized and prospected in order to provide reference for the development of efficient catalysts for catalytic ozonation technology.

Keywords

• catalytic ozonation
• phenolic compounds
• catalyst
• catalyst support