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Formation of Active Species by Bipolar Pulsed Discharge in Water

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6 Author(s)
Ruobing Zhang ; Lab. of Adv. Technol. of Power & Electr. Eng., Tsinghua Univ., Shenzhen, China ; Xian Zhang ; Wenchang Ma ; Ying Xu
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Water treatment by the direct electrical discharge in aqueous solution is an innovative advanced oxidation technology of water treatment. During the discharge processes, a large amount of high-energy electrons and active species, such as H2O2 and O3, are produced. Those active species directly react with organic molecules dissolved in water and oxidize them or even get them completely mineralized. In this paper, the concentrations of H2O2 and O3 in a gas-liquid-solid mixture treated by bipolar pulsed discharges were measured. The effect of different experiment conditions on the H2O2 and O3 concentration was investigated. Experimental results prove that bipolar pulsed discharges in a packed bed reactor have a better performance on H2 O2 and O3 generation than unipolar pulsed discharges. Besides, parameters, such as the discharge time, the applied voltage, the characteristics of the solid packing, and the gas flow rate, were positively correlated with the generation of H2O2 and O3. Essentially, the H2O2 and O3 concentrations were mainly influenced by the single pulse energy that was also verified by experiments.

Published in:

Plasma Science, IEEE Transactions on  (Volume:40 ,  Issue: 10 )

Date of Publication:

Oct. 2012

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