Degradation of Alizarin Red by Hybrid Gas-Liquid Dielectric Barrier Discharge

LIN Qifu(林启富); NI Guohua(倪国华); JIANG Yiman(江贻满); WU Wenwei(吴文伟); MENG Yuedong(孟月东)

doi:10.1088/1009-0630/16/11/07

Plasma Science and Technology > 2014 > 16(11): 1036-1041. > DOI: 10.1088/1009-0630/16/11/07

LIN Qifu(林启富), NI Guohua(倪国华), JIANG Yiman(江贻满), WU Wenwei(吴文伟), MENG Yuedong(孟月东). Degradation of Alizarin Red by Hybrid Gas-Liquid Dielectric Barrier Discharge[J]. Plasma Science and Technology, 2014, 16(11): 1036-1041. DOI: 10.1088/1009-0630/16/11/07

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Degradation of Alizarin Red by Hybrid Gas-Liquid Dielectric Barrier Discharge

Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Funds: supported by National Natural Science Foundation of China (Nos.21171169, 21377133), and the Special Foundation of the President of Hefei Institute of Physical Science, Chinese Academy of Sciences (No.YZJJ201331)

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Received Date: October 15, 2013

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Abstract

Abstract

A system based on dielectric barrier discharge (DBD) with improved discharge sta- bility and homogeneity was used for the degradation of Alizarin Red (AR). This special structure of the DBD system is characterized by the high voltage electrode, which is covered with a quartz tube and partially immersed in water, and by directly using the water as the ground electrode. A transition was realized from the filamentary mode for the conventional structure of the DBD to the semi-homogeneous mode for such a configuration of the plasma discharge. The spectra of plasma are dominated by N 2 molecular lines in the ultraviolet-A radiation region. Plasma degra- dation of AR in this system exhibited pseudo-first-order reaction kinetics. The degradation rate of AR reached 95% or so after 14 min treatment under favorable conditions. Alkaline conditions are favorable for the degradation of AR. The increase of conductivity of the solution, input power and usage of oxygen bubbling could enhance AR degradation.
- water purification,
- degradation,
- alizarin red,
- dielectric barrier discharge

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References (27)

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