Degradation of Bisphenol S Using O3 and/or H2O2 with UV in a Flow-Through Reactro.

In this paper, degradation of bisphenol S (BPS) in spiked water and postsecondary-treated wastewater by a variety of oxidation processes was investigated in a flow-through reactor. Kinetics of degradation in O₃, ultraviolet ðUVÞ=O₃, UV=H₂O₂, and UV=O₃=H₂O₂ were determined and reported. The degradation of BPS by O₃ alone was competitive with the UV-promoted methods. An increase in BPS loss with O₃ was observed in postsecondary-treated wastewater, demonstrating its potential application as a treatment method for BPS. Total organic carbon (TOC) as an indicator of the extent of organic compound mineralization and sulfate as a by-product produced during degradation were measured. It was noted that although the loss of BPS was similar in the UV=O₃=H₂O₂ and the O₃ processes, the overall mineralization rate was different, indicating that the combination technique offers a more efficient system in terms of overall mineralization rate. The UV=O₃=H₂O₂ process was the most effective and led to complete mineralization of 50 mg=L BPS within 90 min in both spiked water and postsecondary-treated wastewater. [ABSTRACT FROM AUTHOR]