Liu Bin, Wu Feng, Deng Nan-sheng
Department of Environmental Science, Wuhan University, Wuhan 430072, PR China.
J Hazard Mater. 2003 Mar 17;98(1-3):311-6. doi: 10.1016/s0304-3894(02)00321-7.
The photodegradation of 17alpha-ethynylestradiol (EE2) in aqueous solutions induced by UV-light was preliminarily studied in this paper by means of fluorescence, UV and infrared spectra. The result suggested that EE2 in aqueous solutions underwent photodegradation under irradiation with UV disinfection lamp (lambda = 254 nm, 30 W), but the photodegradation was not observed under high pressure mercury lamp (lambda > or = 365 nm, 250 W). The photodegradation of 1.6-20.0 mg/l EE2 in aqueous solutions at a given initial pH value of 6.8 was pseudo-first order reaction. Increasing the initial concentration of EE2 lowered the photodegradation rate. The photodegradation rate of EE2 reached the lowest value at pH about 5.0, higher pH values of 6.0-8.0 benefited the photodegradation. Ferric ions can promote the photodegradation of EE2 in aqueous solutions at pH value of 2.0-5.0.
本文通过荧光光谱、紫外光谱和红外光谱，初步研究了紫外光诱导下17α-乙炔基雌二醇（EE2）在水溶液中的光降解情况。结果表明，EE2在水溶液中经紫外线消毒灯（λ = 254 nm，30 W）照射会发生光降解，但在高压汞灯（λ≥365 nm，250 W）照射下未观察到光降解现象。在给定初始pH值为6.8时，水溶液中1.6 - 20.0 mg/L的EE2光降解为假一级反应。提高EE2的初始浓度会降低光降解速率。EE2的光降解速率在pH约为5.0时达到最低值，pH值在6.0 - 8.0时更有利于光降解。在pH值为2.0 - 5.0时，铁离子可促进水溶液中EE2的光降解。
