2013 Fiscal Year Final Research Report
Development of the novel liquid processing by combining an atmospheric-pressure microplasma with microbubbles
| Project/Area Number |
23540582
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Plasma science
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| Research Institution | Tsuruoka National College of Technology |
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Principal Investigator |
YOSHIKI Hiroyuki 鶴岡工業高等専門学校, その他部局等, その他 (00300525)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 大気圧プラズマ / 酸素ラジカル / 微細気泡 / 有機物分解 / 殺菌処理 / OHラジカル / プラズマ化学 |
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| Research Abstract |
Atmospheric-pressure microplasma flow was generated between a surgical needle electrode and GND by a pulsed high voltage. Decolorization of an indigo carmine solution, sterilization of E-coil and bacteria and synthesis of graphite oxide were studied using microbubbles of the plasma gas. Since ozone production efficiency is low and the ozone concentration dissolved in water is less than 0.25 ppm, it suggests the possibility of water treatment without using dense ozone. In O2 plasma bubbling, rapid oxidation occurs due to O radicals. On the other hand, N2/O2 plasma bubbling shows organic compounds were decomposed slowly via introducing nitroso groups with NO2 ions under weak acidity. Furthermore, ESR measurement and chemical probe method using terephthalic acid showed OH radicals generated in water by the O2 plasma bubbling.
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