摘要
The ozone oxidation of endocrine disruptor bisphenol A in drinking water was investigated.A stainless completely mixed reactor was employed to carry out the degradation experiments by means of a batch model.With an initial concentration of 11.0 mg/L,the removal efficiencies of BPA(bisphenol A)could be measured up to 70%,82%,and 90%when the dosages of ozone were 1,1.5,and 2 mg/L,respectively.The impacts on BPA degradation under the con-ditions of different ozone dosages,water background values,BPA initial concentrations,and ozone adding time were ana-lyzed.The results showed that ozone dosage plays a dominant role during the process of BPA degradation,while the impact of the contact time could be ignored.UV wavelength scan-ning was used to confirm that the by-products were produced,which could be absorbed at UV254.The value of UV254 was observed to have changed during the ozonation process.Based on the change of UV254,it could be concluded that BPA is not completely degraded at low ozone dosage,while shorter adding time of total ozone dosage,high ozone dosage,and improvement of dissolved ozone concentration greatly contribute to the extent of BPA degradation.The effects of applied H_(2)O_(2) dose in ozone oxidation of BPA were also examined in this study.The O_(3)-H_(2)O_(2) processes proved to have similar effects on the degradation of BPA by ozone oxidation.
基金
This work was completed with help from all members of the project team led by Professor GAO Naiyun.This work was supported by the National High-Tech Research and Development(863)Program of China(Grant No.2002AA649410)
the Basic Science Research Program of Shanghai(Grant No.05JC14059)
the Excellent Young Teachers Program of Tongji University
This work belongs to the open pro- gram of the state key laboratory of pollution control and resources reuse (PCRRF05007), Tongji University.
