Advanced oxidation of bisphenol A (BPA) in aqueous system by O3/Na2S2O8 was investigated, the degradation of BPA was affected by ozone concentration, persulfate dosages, initial pH, and BPA concentration. Experimental results indicated that the degradation of BPA was proved to follow the pseudo-first order kinetics model and was enhanced with the increase of O3 concentration and the decrease of initial BPA concentration. pH played a significant role in the BPA removal especially under the alkaline condition. Free radical species in the O3/Na2S2O8 system were identified by using tertiary butyl alcohol (TBA) and ethanol (ETOH) as two probes, the results found that the major free radical was SO4 − · at acidic condition (pH = 3), and the concentration of ·OH increased with the pH increased. Eight products were detected during the reaction according to liquid chromatograph-mass spectrometry analysis. Most of the intermediates contained quinonoid derivatives, carboxylic acid, and the relevant mechanism for BPA degradation by O3/Na2S2O8 system were proposed.
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This work was financially supported by National Natural Science Foundation of China (NO. 51508354), Sichuan Provincial Environmental Protection Office (NO. 2013HB08), and Science Foundation for The Excellent Youth Scholars of Sichuan University (NO. 2082604174048). The authors are thankful to all the anonymous reviewers for their insightful comments and suggestions.
Conflict of Interest
The authors declare that they have no competing interests.
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Yang, Y., Guo, H., Zhang, Y. et al. Degradation of Bisphenol A Using Ozone/Persulfate Process: Kinetics and Mechanism. Water Air Soil Pollut 227, 53 (2016). https://doi.org/10.1007/s11270-016-2746-x
- Sulfate radical
- Bisphenol A