Abstract
Efficiency of technologies using ultrasonic waves superimposed with hydrogen peroxide for the removal of Bisphenol A (BPA) from the aqueous solution was well studied and investigated. BPA is a non-biodegradable antioxidant, which was highly resistant to the biological and chemical breakdown; the non-biodegradability of the dye made it noxious and hazardous material for the both aquatic flora as well as fauna. Tests were done at two levels i.e. ultrasonic power 300 and 500W; frequencies of 35 and 130kHz respectively and at the optimum pH levels of 3, 7 and 11. Hydrogen peroxide levels were tested at concentrations of 5, 15 and 30mg/l. Obtained results demonstrated that the efficiency of BPA breakdown using a process combining ultrasonic waves assisted by hydrogen peroxide was more effective than separately applied processes. The highest rate of decomposition was achieved at the frequency of 130kHz and 500W assisted by 30mg/l H2O2 at pH level 11. The removal efficiency of BPA in natural samples decreased compared to efficiency in synthetic samples.
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•Ultrasonic wave superimposed with H2O2 used as efficient technique for BPA removal.•The optimized pH was found to be 11.•Removal efficiency increases with the increased in sonication time.•Removal efficiency of BPA follows an order US130+H2O2>US35+H2O2>US130>US35>H2O2.•Effects of frequency in removal BPA were more than the effect of power.