Investigation ZnO and Different Additives on Ultrasonic Degradation of Bisphenol A.

Degradation of bisphenol A (BPA) or 4, 4'-isopropylidene diphenol, a common endocrine disruptor was carried out by ultrasound irradiation at 40 kHz in the presence of ZnO nanoparticles, NaCl, Na2SO4, H2O2, and CCl4. The BPA degradation is carried out at pH 6.3(stock solution), pH 2, and 8 in the presence and absence of the aforesaid additives at different concentrations. The degradation behavior of BPA was measured through the UVvisible spectrophotometer. The ZnO nanoparticle was synthesized by the Sol-Gel method and characterized by SEM, EDX, and XRD. The experimental result shows that the rate of degradation increased with the addition of additives. The synthesized ZnO nanoparticle drastically favored the degradation rate of BPA. The BPA degradation rate is also improved in acidic conditions compared to the basic conditions. Therefore, the BPA can be efficiently removed from the aqueous medium using ultrasound irradiation in the presence of ZnO nanoparticles, NaCl, Na2SO4, H2O2, and CCl4. [ABSTRACT FROM AUTHOR]