期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 23, 期 1, 页码 31-36出版社
SCIENCE PRESS
DOI: 10.1016/S1001-0742(10)60397-X
关键词
bisphenol-A (BPA); ultrasonic irradiation; power density; additives
资金
- National Natural Science Foundation of China [50878163, 50708067]
- National Major Project of Science & Technology Ministry of China [2008ZX07421-002]
- National High Technology Research and Development Program (863) of China [2008AA06A412]
- Ministry of Housing and Urban-Rural Development [2009-K7-4]
This study investigated the degradation of bisphenol-A (BPA) by ultrasonic irradiation in the presence of different 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 different experimental conditions. The optimum power intensities were 0.9, 1.8, and 3.0 W/cm(2) 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.
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