SHIShuo,WANGQiao,WANGYi-xiao,et al.Industrial Application of Catalytic Ozonation for Advanced Treatment of Petrochemical Wastewater[J].China Water & Wastewater,2024,40(9):35-41.
Industrial Application of Catalytic Ozonation for Advanced Treatment of Petrochemical Wastewater
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第9期
Page:
35-41
Column:
Date of publication:
2024-05-01
- Abstract:
- This paper compared the performances of three commercial catalysts,which were silicon-based supported iron catalysts (referred to silicon-based catalyst), silicon-aluminum based supported cerium catalysts (referred to Si-Al based catalyst) and silicon-based supported iron manganese catalysts (referred to Si-C catalyst), for catalytic ozonation of petrochemical wastewater to determine the catalyst with high catalytic activity and the minimum metal leaching amount, so as to achieve industrial application of ozonation catalysts. Firstly, the catalyst characterization and adsorption experiments showed that the Si-Al based catalyst had more gullies on the surface, larger specific surface area and stronger adsorption capacity, and its specific surface area and compressive strength increased after use. By contrast, the silicon?based catalyst had no prospect for further exploration. Secondly, two commercial ozonation catalysts were employed to treat secondary effluent from a petrochemical wastewater treatment plant. The Si-Al based catalyst demonstrated removal rates of 24% for TOC and 36% for COD, which met the requirements of industrial application and showed superior performance compared with Si-C catalyst. In the end, a large amount of metal leaching was observed after the first use of the Si-Al based catalyst and Si-C catalyst, the metal leaching amount of the Si-Al based catalyst tended to be zero after the reuse of 5 times, and the catalytic activity could be maintained for 10 times of reuse. By contrast, the catalytic activity of Si-C catalyst was worse than that of ozonation alone after 8 times of reuse. The comprehensive comparison results showed that the Si-Al based catalyst met the industrial application requirements for advanced treatment of petrochemical wastewater.
Last Update:
2024-05-01