臭氧化降解给水系统中磺胺甲噁唑的试验研究  

INVESTIGATION ON THE DEGRADATION OF SULFAMETHOXAZOLE IN WATER SUPPLY SYSTEM BY OZONIZATION

作　　者：薛罡[1] 钭晨[1] 江晨舟[1] 

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《水处理技术》2010年第3期67-69,77,共4页Technology of Water Treatment

基　　金：教育部科学技术研究重点项目(107046);教育部新世纪优秀人才支持计划(NECT-07-0175);上海市基础研究重点项目(08JC1400500)

摘　　要：研究了臭氧对难降解的磺胺甲噁唑(SMZ)的氧化效果,考察了pH、臭氧投加量、SMZ含量、自由基清除剂的去除对反应的影响,并对反应机理进行了初探。结果表明,在强碱性溶液中,O3分解产生.OH,通过.OH的强氧化作用,质量浓度为200μg·L-1的SMZ废水在臭氧投加量为4mg·L-1条件下,去除率可达56.83%。臭氧氧化对SMZ有一定的降解作用,尤其在高pH条件下,.OH可将SMZ氧化生成相对分子质量较小的物质,主要是对氨基苯磺酰胺、NO3-以及有机酸。The removal efficiency and the effect of pH value, ozone dose, wastewater concentration, removal of free radical inhibitor were studied during the ozonization of sulfamethoxazole wastewater. The reaction mechanism was also explored. The results showed that the decomposition of ozone at high pH value in the formation of hydroxyl radicals, and the removal rate of 200 μg·L^-1 wastewater is 56.83% when the ozone dose is 4 mg·L^-1 because of its ozonization effect. fonamide, NO3^- and some organic acid can be detected after the degradation of sulfamethoxazole by ozonization.

关 键 词：臭氧 磺胺甲噁唑 羟基自由基 

分 类 号：TU991.2[建筑科学—市政工程]