Catalytic ozonation of reactive red X-3B in aqueous solution under low pressure: decolorization and OH· generation

Abstract

Catalytic ozonation of Reactive Red X-3B in aqueous solution had been carried out in an ozone oxidation reactor where Mn-Fe-ceramic honeycomb was used as the catalysts. The presence of Mn-Fe-ceramic honeycomb catalyst could obviously improve the decoloration efficiency of Reactive Red X-3B and the utilization efficiency of ozone compared to the results from non-catalytic ozonation. Adsorption of Reactive Red X-3B had no obviously influence on the degradation efficiency. Addition of tert-butanol significantly decreased the degradation efficiency, indicating that the degradation of Reactive Red X-3B followed the mechanism of hydroxyl radical (OH·) oxidation. The operating variables such as reaction pressure and ozone supply had a positive influence on the degradation efficiency, mainly attributing to facilitate the ozone decomposition and OH· formation.

Keywords

catalytic ozonation / reactive red X-3B / ceramic honeycomb / hydroxyl radical (OH·)

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Acknowledgements

This work was funded by National Science and Technology Major Project for Water Pollution Control and Treatment of China (No. 2012ZX07202006),and the Program for Changjiang Scholars and Innovative Research Team at the University of China (IRT13R05, DUT14QY01).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg