A B S T R A C TBisphenol A (BPA) and 4-tert-octylphenol (OP) are well-known endocrine disrupting compounds. Ultrasonic and photocatalytic degradation of BPA and OP were carried out by optimizing different parameters such as effects of the pH, ultrasonic frequency, power and the dosing amount of the sodium persulfate (oxidizer)/TiO 2 photocatalyst. The results showed that the maximum ultrasonic degradation of BPA and OP was obtained at a pH value of 5, 45 kHz frequency, 500 W power and with sodium persulfate concentration ranging from 100 to 200 mg/L under bubbling of air, whereas for photocatalytic degradation, maximum degradation was observed at a pH value of 5, and TiO 2 dosing ranging from 50 to 150 mg/L. Photocatalytic degradation was found to be more efficient and cost-effective than ultrasonic degradation.

Bisphenol A (BPA) and 4-tert-octylphenol (OP) were well known as endocrine disrupting compounds. Ultrasonic degradation of BPA and OP was carried out by optimizing different parameters. Optimum parameters for ultrasonic degradation of BPA and OP were found to be 5 pH, 45 KHz frequency & 500 W power of sonication bath and 100-200 mg/L of Sodium persulfate in presence of air. Both degradation processes were monitored under UV absorption spectra. It was observed that both the reaction followed first order kinetics. During BPA and OP degradation the intermediates formed were identified by GC-MS analysis. The degradation rate was strongly affected by pH in both processes.