*3.4. Catalytic Wet Peroxide Oxidation Experiments*

Oxidation experiments with a BPA aqueous solution (60 mg/L) were performed in a three-necked flask equipped with a reflux condenser. BFS30-60, BFS25-60, BFS20-60, BFS17.5-60, Fe/BFS30-60, and Fe/BFS17.5-60 were examined at a reaction temperature of 50 ◦C, a H2O<sup>2</sup> concentration of 1.5 g/dm<sup>3</sup> (stoichiometric amount to total oxidation of BPA), and a catalyst loading of 4 g/dm<sup>3</sup> , with a reaction volume of 0.16 dm<sup>3</sup> . Oxidation was started while the reaction temperature was reached by the addition of H2O2, which was added in batches to maintain a stable oxidation agent concentration during the 3 h test. Water samples were taken as a function of reaction time, which were filtered using a 0.45 µm filter paper. The pH and dissolved oxygen (DO) were measured from water samples during the experiment. Furthermore, the effects of pH and temperature on oxidation were examined using Fe/BFS30-60 and Fe/BFS17.5-60. For evaluating the stability and reusability of the prepared materials, Fe/BFS17.5-60 was examined in three consecutive oxidation reactions. In addition, the regeneration of used Fe/BFS17.5-60 was

performed by heating the catalyst for 2 h at two temperatures (i.e., 250 ◦C and 500 ◦C) to examine the effect of heat treatment on the activity of the used catalyst.
