ENVR 286 |
| Aqueous nitrobenzene was removed by TiO2/zeolite-catalyzed ozonation. The removal efficiency of nitrobenzene was increased from ozone alone at 12.57% to catalytic ozonation at 33.76%. The optimum calcination temperature of the catalyst was found to be at 600°C. Rutile TiO2 was more effective than anatase TiO2 in catalytic ozonation. The degradation of nitrobenzene was a first-order reaction with respect to the initial concentration of nitrobenzene. When the dose of radical scavengers was increased, the degradation of nitrobenzene decreased significantly, which proved that OH• was the dominating species in the oxidation process. The removal rate of nitrobenzene increased with the increase of catalyst dose. The increase of reaction temperature enhanced the removal rate. Nitrobenzene degradation varied with pH value and reached the best removal rate at approximately pH=10. |
|
Advances in Abiotic Transformation Processes for Micropollutants in Drinking Water and for Sourcewater Protection
6:00 PM-8:00 PM, Wednesday, April 9, 2008 Morial Convention Center -- Hall A, Poster
Division of Environmental Chemistry |