Volume 8 Issue 3
Jul.  2015
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Article Navigation >  Water Science and Engineering  > 2015  >  8(3): 233-238
Bin Wang, Chang-ping Zhu, Run-hang Gong, Jin Zhu, Bo Huang, Fei Xu, Qing-gong Ren, Qing-bang Han, Zhen-bing He. 2015: Degradation of acephate using combined ultrasonic and ozonation method. Water Science and Engineering, 8(3): 233-238. doi: 10.1016/j.wse.2015.03.002
Citation: Bin Wang, Chang-ping Zhu, Run-hang Gong, Jin Zhu, Bo Huang, Fei Xu, Qing-gong Ren, Qing-bang Han, Zhen-bing He. 2015: Degradation of acephate using combined ultrasonic and ozonation method. Water Science and Engineering, 8(3): 233-238. doi: 10.1016/j.wse.2015.03.002
shu

Degradation of acephate using combined ultrasonic and ozonation method

doi: 10.1016/j.wse.2015.03.002
  • a.

    Changzhou Key Laboratory of Sensor Networks and Environmental Sensing, Hohai University, Changzhou 213022, PR China

  • b.

    Nanjing Institute of Electronic Technology, Nanjing 210039, PR China

  • c.

    College of Petrochemical Engineering, Changzhou University, Changzhou 213164, PR China

  • d.

    Changzhou Xinlinian Ultrasonic Equipment Co., Ltd., Changzhou 213104, PR China

Funds:  This work was supported by the National Natural Science Foundation of China (Grants No. 11274092, 11274091, and 11304026), the Jiangsu Graduate Education Reform Research and Practice Project in 2009 (Grant No. 22)，and the Fundamental Research Fund for the Central Universities (Grant No.14B10128).
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  • Corresponding author: Chang-ping Zhu
  • Received Date: 2014-07-07
  • Rev Recd Date: 2015-03-20
    Abstract
  • The degradation of acephate in aqueous solutions was investigated with the ultrasonic and ozonation methods, as well as a combination of both. An experimental facility was designed and operation parameters such as the ultrasonic power, temperature, and gas flow rate were strictly controlled at constant levels. The frequency of the ultrasonic wave was 160 kHz. The ultraviolet-visible (UV-Vis) spectroscopic and Raman spectroscopic techniques were used in the experiment. The UV-Vis spectroscopic results show that ultrasonication and ozonation have a synergistic effect in the combined system. The degradation efficiency of acephate increases from 60.6% to 87.6% after the solution is irradiated by a 160 kHz ultrasonic wave for 60 min in the ozonation process, and it is higher with the combined method than the sum of the separated ultrasonic and ozonation methods. Raman spectra studies show that degradation via the combined ultrasonic/ozonation method is more thorough than photocatalysis. The oxidability of nitrogen atoms is promoted under ultrasonic waves. Changes of the inorganic ions and degradation pathway during the degradation process were investigated in this study. Most final products are innocuous to the environment.

     

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