Enhanced Degradation of Nitrobenzene by Ozone/Zeolite Process
Degradation of nitrobenzene by ozone/zeolite process was investigated under different experimental conditions. The results showed that the removal efficiency of nitrobenzene was significantly promoted in the presence of zeolite compared with the case of ozonation alone. By investigating the effect of tertbutyl alcohol on nitrobenzene removal, it was concluded that nitrobenzene was mainly degraded by hydroxyl radicals in solution. The degradation rate of ozone/zeolite process was inhibited significantly by increasing ionic strength. When the ionic strength concentration increased from 0 to 1×10-3mol/L, the removal of nitrobenzene by ozone/zeolite process decreased from 81.2％ to 31.6％ correspondingly. The pH mainly affected the decomposition rate of ozone. As pH decreased, the degradation rate of nitrobenzene by ozone/zeolite process decreased. Finally, the adsorption of ozone on H-form zeolite was investigated. The results showed that ozone can be adsorbed on H-form zeolite, and finally decomposed.
ozone zeolite nitrobenzene hydrozyl radical adsorption
Ke Liu Qingdong Qin Jun Ma
School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin, China
国际会议
上海
英文
2915-2917
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）