Quantification of low molecular weight oxidation byproducts produced from real filtered water after catalytic ozonation with different pathways

Catalytic ozonation was suggested to be effective for micmpollutant removal during water treatment. However, research on organic byproduct formation from catalytic ozonation of real filtered water in water treatment plants was lacking. In this work, two synthesized catalysts, alpha-FeOOH and CeO2, were applied to catalyze ozonation of real filtered water at different ozone dosages, and the byproducts were quantified. Results showed that the alpha-FeOOH enhanced hydroxyl radical production, while the CeO2 did not. Both catalysts further reduced dissolved organic carbon (DOC) and UV(254 )of the filtered water during the catalytic oxidation processes. The O-3/CeO2 improved the removal of low molecular weight compounds, especially the refractory compounds such as ketoacids and carboxylic acids, compared to ozonation alone. While the O-3/alpha-FeOOH generated higher concentrations of carboxylic acids than that of ozonation. Thus, in light of DOC and low molecular weight compound reductions, CeO2 was the superior catalyst for micropollutant removal in real filtered water.

Automated summary

Catalytic ozonation using two different synthesized catalysts, alpha-FeOOH and CeO2, was conducted on real filtered water, showing that CeO2 was more effective in removing low molecular weight compounds and refractory compounds, while alpha-FeOOH generated higher concentrations of carboxylic acids.