Degradation of bisphenol-A using ultrasonic irradiation assisted bylow-concentration hydrogen peroxide
Kejia Zhang , Naiyun Gao , Yang Deng , Tsair Fuh Lin , Yan Ma , Lei Li , Minghao Sui
DOI:
Received February 02, 2010,Revised April 20, 2010, Accepted , Available online
Volume 23,2011,Pages 31-36
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This study investigated the degradation of bisphenol-A (BPA) by ultrasonic irradiation in the presence of di erent additives (H2O2, air
bubbles and humic acid) under various operating conditions, i.e., ultrasonic frequency, power intensity and power density. The results
demonstrated that the BPA degradation followed pseudo first-order kinetics under di erent experimental conditions. The optimum
power intensities were 0.9, 1.8, and 3.0 W/cm2 at the frequencies of 400, 670, and 800 kHz, respectively. At the fixed frequency (800
kHz), the degradation rate of BPA was shown proportional to the increase of power density applied.With this manner, the BPA sonolysis
could be facilitated at H2O2 dosage being lower than 0.1 mmol/L; while BPA degradation was hindered at H2O2 concentration in
excess of 1 mmol/L. Additionally, BPA removal was shown to be inhibited by the presence of aeration and humic acid during ultrasonic
irradiation. The present study suggested that the degradation rate of BPA assisted by ultrasonic irradiation was influenced by a variety
of factors, and high BPA removal rate could be achieved under appropriate conditions.
