Degradation of endocrine disruptor bisphenol A in drinking water by ozone oxidation |
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Authors: | Xu Bin Gao Naiyun Rui Min Wang Hong and Wu Haihui |
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Institution: | (1) State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China |
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Abstract: | 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 conditions of different ozone dosages, water background
values, BPA initial concentrations, and ozone adding time were analyzed. 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 scanning
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 H2O2 dose in ozone oxidation of BPA were also examined in this study. The O3-H2O2 processes proved to have similar effects on the degradation of BPA by ozone oxidation.
Translated from Environmental Science, 2006, 27(2): 294–299 译自: 环境科学] |
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Keywords: | drinking water endocrine disruptor bisphenol A ozone oxidation O3-H2O2 processes |
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