CAJ | 학술논문

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.
채용UV체계(UV、UV/H2O2화UV/H2O2/TiO2)강해수중동시존재적3충미량류고순자격소자동(E1)、17-β자이순(E2)화17-α을결기자이순(EE2),결과표명,강해과정균부합일급반응동역학,통과불동 UV 계통대비발현,관건인소대혼합오염강해적영향순서위 H2O2>광강>TiO2.E1광해특성량호,재혼합기질중가우세강해；E2화 EE2직접광해효과교차,우렬순서수도광강적영향,광강승고 EE2략점우세.H2O2화최화제TiO2적투가가제고3충물질적강해효과급강해속솔상수,단경쟁조건하E2화EE2적거제솔제고유한.E1,E2화EE2적광화학강해과정구유상사적전화추세,균가생성여E1결구유사적부산물.
UV(/H2O2/TiO2) was applied to remove three co-existing steroid estrogens, including estrone (E1), 17β-estradiol (E2) and 17α-ethinyl estradiol (EE2) from aqueous solutions. The degradation fitted first-order kinetic models very well, with the significance of three key impact factors on degradation followed the order of H2O2 > irradiation intensity >TiO2. E1took advantages in competitive degradation for its character of photosensitiveness. The order of degradation rates of E2and EE2 under UV alone was dependent on UV intensity. EE2 had slight superiority with the increase of UV intensity. Addition of H2O2 and TiO2 facilitated the degradation of E1while with minor impact on E2 and EE2 due to the competition of E1. E1, E2 and EE2 exhibited analogous transformation pathway during photodegradation. Same byproduct structurally similar with E1was detected.