水溶液中己烯雌酚的臭氧氧化研究

利用臭氧氧化技术对己烯雌酚(DES)水溶液进行了研究,考察DES溶液初始浓度、溶液初始pH值、臭氧投加量对DES降解的影响.结果表明,在pH3.0～9.0范围内,pH初始值越高,DES降解率越大;在5～20mg/L范围内,DES初始浓度越大,降解效率越高,反应属于一级动力学,动力学方程为-dc/dt=0.08785c;臭氧投加量越大,DES去除率越高;HPLC色谱图表明,在DES臭氧氧化降解过程中,有极性较DES大的产物;氧化过程中溶液的pH值和电导率的变化结果表明,有小分子酸性物质产生.

Degradation of Diethylstilbestrol in Aqueous Solution by Ozonation

This study investigates the ozonation of diethylstilbestrol (DES) in aqueous solution. The affecting factors on the degradation of DES are studied and described in details,such as initial DES concentration,initial pH value and ozone concentration. The results indicate that the degradation efficiency of DES is dependent on the pH value .The higher of pH value is,the higher is the degradation efficiency of DES in water at pH value over range of 3.0~9.0. The degradation efficiency has increased with increasing initial concentration of DES over the range of 5~20 mg/L. The degradation efficiency increased with increasing concentration of O3. In addition,some parameters such as pH,electrical conductivity and degradation products are monitored during the process. During the ozonation process the rapid decrease of pH and the sharp increase of electrical conductivity indicate the formation of acidic by-products were confirmed by high performance liquid chromatography (HPLC).