UV体系中3种微量类固醇雌激素的竞争降解及同趋转化

发布时间：2018-05-03 16:50

本文选题：UV系统 + 雌酮　；参考：《中国环境科学》2014年04期

【摘要】：采用UV体系(UV、UV/H2O2和UV/H2O2/TiO2)降解水中同时存在的3种微量类固醇雌激素雌酮(E1)、17-β雌二醇(E2)和17-α乙炔基雌二醇(EE2),结果表明,降解过程均符合一级反应动力学,通过不同UV系统对比发现,关键因素对混合污染降解的影响顺序为H2O2光强TiO2.E1光解特性良好,在混合基质中可优势降解;E2和EE2直接光解效果较差,优劣顺序受到光强的影响,光强升高EE2略占优势.H2O2和催化剂TiO2的投加可提高3种物质的降解效果及降解速率常数,但竞争条件下E2和EE2的去除率提高有限.E1,E2和EE2的光化学降解过程具有相似的转化趋势,均可生成与E1结构类似的副产物.
[Abstract]:The degradation of three trace steroid estradiol (E1- 尾 estradiol) and 17- 伪 ethylestradiol estradiol (E2) and 17- 伪 ethynyl estradiol (17- 伪 -ethylestradiol) in water by UV system UV / H _ 2O _ 2 and UV / H _ 2O _ 2 / TIO _ 2) were studied. The results showed that the degradation process was in accordance with the first-order reaction kinetics. The order of influence of key factors on the degradation of mixed pollution is that the photolysis characteristics of H2O2 intensity TiO2.E1 are good, and the direct photolysis of E2 and EE2 can be preferentially degraded in the mixed matrix, which is affected by the light intensity. The addition of H _ 2O _ 2 and TiO2 could improve the degradation efficiency and degradation rate constant of three substances, but the removal rate of E _ 2 and EE2 could be increased by a limited amount of E _ 2 and EE2 under competitive conditions. The photochemical degradation of E _ 2 and EE2 had a similar trend. All of them can produce by-products similar to E1 structure.
【作者单位】：浙江工业大学建筑工程学院;厦门理工学院水资源环境研究所;同济大学环境科学与工程学院;浙江省浦江县固废管理中心;
【基金】：国家自然科学基金项目(51208468,51008261) 浙江省自然科学基金(LQ12E08013) 浙江工业大学校基金重点项目(1101106040408) 江苏省环境科学与工程重点实验室开放基金(Zd131202)
【分类号】：TU991.2

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