Removal of Water Pollutants by Pulsed Discharge Plasma and Observation of Its Optical Emission Intensity at Atmospheric Pressure
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概要
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Pulsed discharge plasma over the liquid surface was observed in the needle electrode configuration. The characteristics of streamer propagation including its optical emission intensity were investigated by using the intensified charge coupled device (ICCD) camera. The experiment was conducted at 313 K, 0.1 MPa argon in a batch-type reactor with methyl orange as a starting material. The characteristic of pulsed streamers were started from the electrode placed above the methyl orange liquid surface and then reached the methyl orange liquid surface, where they propagated on it. The propagation of pulsed streamers and their progression distance increased with the increase in peak voltage value. The optical emission intensity increased immediately after the breakdown; and it increased to its peak value when the applied voltage reached its peak value. After pulsed discharge plasma treatment, methyl orange degraded into its derived compounds with the appearance of light color. UV--vis spectrophotometer analyzed that the intermediate compounds from the degradation of methyl orange consist primarily of aromatic compounds which contain nitrogen functional groups. The degradation of methyl orange is 99% when the number of discharge plasma was 20000\times. With increasing the pulse discharge numbers, the pH and the conductivity of methyl orange solution changed clearly.
- 2013-11-25
著者
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Takada Noriharu
Department Of Electrical Engineering And Computer Science Nagoya University
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Sasaki Koichi
Division Of Quantum Science And Engineering Faculty Of Engineering Hokkaido University
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Goto Motonobu
Department of Applied Chemistry & Biochemistry, Faculty of Engineering, Kumamoto University
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Takada Noriharu
Department of Electrical Engineering and Computer Science, Nagoya University, Nagoya 464-8603, Japan
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Kanda Hideki
Department of Chemical Engineering, Nagoya University, Nagoya 464-8603, Japan
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Hayashi Yui
Department of Chemical Engineering, Nagoya University, Nagoya 464-8603, Japan
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Machmudah Siti
Department of Chemical Engineering, Nagoya University, Nagoya 464-8603, Japan
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