Degradation of nitrobenzene in aqueous solution by ozone-ceramic honeycomb.
The degradation of nitrobenzene by ceramic-honeycomb catalyzed ozonation was investigated. The results showed that the presence of ceramic honeycombs significantly increased the oxidation rate of nitrobenzene by ozone compared to the case of ozone oxidation alone. In this paper, the effects of various factors on the catalytic oxidation were investigated, such as the amount of catalysts, the ozone dosage, the temperature, the pH value and the presence of tert-butanol. With the addition of tert-butanol the removal of nitrobenzene decreased sharply, which appeared to support that, the degradation of nitrobenzene by ozonation followed a radical type mechanism. The EPR experiments verified that higher nitrobenzene removal rate was attributed to more OH* radicals generated in the catalyzed ozonation than ozonation alone.
Sun
Zhi-Zhong
ZZ
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. sunzz2004@163.com
Ma
Jun
J
Wang
Li-bo
LB
Zhao
Lei
L
D002384:Catalysis; D002516:Ceramics; D006863:Hydrogen-Ion Concentration; D008956:Models, Chemical; D009578:Nitrobenzenes / Q000737:chemistry*; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry*; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*
D009578:Nitrobenzenes; D014874:Water Pollutants, Chemical; D010126:Ozone; C036077:nitrobenzene