不同高级氧化法对水中低浓度药物甲硝唑降解过程的比较  

Comparison of metronidazole degradation by different advanced oxidation processes in low concentration aqueous solutions

作　　者：熊振湖[1] 陈在旭[1] 刘建明[1] 

机构地区：[1]天津城市建设学院环境与市政工程系,天津300384

出　　处：《环境工程学报》2009年第3期465-469,共5页Chinese Journal of Environmental Engineering

基　　金：天津市自然科学基金重点项目(07JCZDJC01700)

摘　　要：采用UV、H2O2、UV/H2O2、Fenton、UV/Fenton和UV/TiO2方法,对水中低浓度的药物甲硝唑进行降解。通过HPLC和UV-Vis光谱得到的甲硝唑去除率。详细讨论了Fe2+、TiO2和H2O2的初始浓度以及溶液的初始pH值对降解效率的影响。结果表明,UV/Fenton和UV/TiO22种系统对水中低浓度甲硝唑均有很好的去除效果,但前者的光催化效率更高。在甲硝唑浓度=6μmol/L,H2O2和Fe2+的初始浓度分别为0.5 mg/L和2.94μmol/L,pH=4的条件下,UV/Fenton方法对甲硝唑水溶液光催化的最佳效率为95.8%。The photocatalytic degradation of the metronidazole was carried out by means of the UV/H2O2, UV/H2O2 ,Fenton, UV/Fenton, UV/TiO2 advanced oxidation processes. The drug degradation was monitored during the experiment with HPLC and UV-Vis absorption. The effects of the initial concentrations, for instance Fe^2＋ ,TiO2 ,H2O2, as well as the solution pH on the removal of the drug were discussed. The result suggests that UV/Fenton and UV/TiO2 systems can remove the drug more efficiently from the waters containing metronidazole in low concentration, but the former is much better than the latter. Under the following reaction conditions：metronidazole = 6umol/L, H2O2 = 0.5 rag/L, Fe^2 ＋ = 2.94/xmol/L, pH = 4, TiO2 = 0.3 g/L, the best removal efficiency of metronidazole by UV/Fenton method is 95.8%.

关 键 词：甲硝唑UV/Fenton UV/TIO2 光催化降解二级出水模拟水溶液 

分 类 号：X703.1[环境科学与工程—环境工程]