Volume 4 Issue 1
Mar.  2011
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Article Navigation >  Water Science and Engineering  > 2011  >  4(1): 74-82
Chang-ping ZHU, Bo HUANG, Qing-bang HAN, Cai-hua NI, Guang-jun ZHU, Ming-hua LIU, Ming-lei SHAN. 2011: Frequency effect on p-nitrophenol degradation under conditions of strict acoustic and electric control. Water Science and Engineering, 4(1): 74-82. doi: 10.3882/j.issn.1674-2370.2011.01.007
Citation: Chang-ping ZHU, Bo HUANG, Qing-bang HAN, Cai-hua NI, Guang-jun ZHU, Ming-hua LIU, Ming-lei SHAN. 2011: Frequency effect on p-nitrophenol degradation under conditions of strict acoustic and electric control. Water Science and Engineering, 4(1): 74-82. doi: 10.3882/j.issn.1674-2370.2011.01.007
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Frequency effect on p-nitrophenol degradation under conditions of strict acoustic and electric control

doi: 10.3882/j.issn.1674-2370.2011.01.007
  • 1.

    College of Computer and Information Engineering, Hohai University, Changzhou 213022, P. R. China

  • 2.

    State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China

  • 3.

    College of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou 221008, P. R. China

  • 4.

    School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, P. R. China

Funds:  This work was supported by the National Natural Science Foundation of China (Grant No. 10974044), the Foundation of State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering (Grant No. 2010490911), and the Fundamental Research Funds for the Central Universities (Grant No. 2009B31514).
More Information
  • Corresponding author: Chang-ping ZHU
  • Received Date: 2010-01-11
  • Rev Recd Date: 2010-09-25
    Abstract
  • The process of decomposing p-nitrophenol (PNP) with power ultrasound requires strict control of acoustic and electric conditions. In this study, the conditions, including acoustic power and acoustic intensity, but not ultrasonic frequency, were controlled strictly at constant levels. The absorbency and the COD concentrations of the samples were measured in order to show the variation of the sample concentration. The results show significant differences in the trend of the solution degradation rate as acoustic power increases after the PNP solution (with a concentration of 114 mg/L and a pH value of 5.4) is irradiated for 60 min with ultrasonic frequencies of 530.8 kHz, 610.6 kHz, 855.0 kHz, and 1 130.0 kHz. The degradation rate of the solution increases with time and acoustic power (acoustic intensity). On the other hand, the degradation rate of the solution is distinctly dependent on frequency when the acoustic power and intensity are strictly controlled and maintained at constant levels. The degradation rate of the PNP solution declines with ultrasonic frequencies of 530.8 kHz, 610.6 kHz, 855.0 kHz, and 1 130.0 kHz; the COD concentration, on the contrary, increase.

     

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