中文摘要：

利用O3／UV降解了水中的硝基苯、乙醇酸和乙酸．在硝基苯的降解过程中，当加入对H2O2具有催化分解作用的MnO2时，O3／UV降解效率明显下降，TOC的去除率甚至比单独臭氧化还低，在相同条件下处理40min后，O3／UV、O3和O3／UV＋MnO2对溶液TOC的去除率分别为44％、41％和39％．该结果表明中间产物H2O2对O3／UV降解效率的提高具有重要的作用．另外，有机物本身对自由基链反应是否具有促进作用也直接影响着O3／UV的降解效率，当目标有机物是对自由基链反应具有促进作用的乙醇酸时，O3／UV降解效率较高，30min后乙醇酸的去除率即达76％；而当目标有机物是对自由基链反应具有抑制作用的乙酸时，O3／UV对其几乎无降解能力．

英文摘要：

Nitrobenzene, glycolic acid and acetic acid were selected to be degraded by O3/UV. During the degradation of nitrobenzene by O3/ UV, addition of MnO2, an effective catalyst to decompose H2O2 in water, decreased the degradation efficiency obviously, and the degradation efficiency of O3/UV was even lower than that of ozonation alone, for example, the TOC removal rates of nitrobenzene by O3/UV, O3 and O3/ UV ＋ MnO2 were 44%, 41% and 39% in 40 minutes, respectively. These results demonstrate that intermediate H2O2 plays an important role in enhancement of degradation efficiency of O3/UV. Furthermore, the characteristic of organic, which acts as promoter or inhibitor in the process of ozonation, also affects the degradation efficiency of O3/UV directly, when glycolic acid, a promoter in ozonation, was degraded, the combination UV radiation with ozonation could remove it effieiency, the removal rate of glycolic acid reached 76% in 30 minutes; however, when acetic acid, an inhibitor in ozonation, was degraded by O3/UV, the removal rate of acetic acid was very low, which was similar with that of ozonation alone.