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Activation of Water by Surface DBD Micro Plasma in Atmospheric Air

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Recent Advances in Technology Research and Education (INTER-ACADEMIA 2018)

Part of the book series: Lecture Notes in Networks and Systems ((LNNS,volume 53))

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Abstract

Exposure of water to atmospheric discharge plasma in air determines generation of long-living reactive species as hydrogen peroxide H2O2, nitrites NO2- and nitrates NO3-. The water thus treated is called plasma activated water and have applications in medicine and agriculture. In the present work, surface DBD micro plasma working in air at atmospheric pressure is used to treat a small amount of deionized water. The surface DBD plasma was generated on the dielectric surface of a device formed by two silver electrodes deposited on the two sides of a thin glass plate. The device was powered by a high voltage amplifier that applied on the electrodes a sinusoidal waveform voltage at a frequency around 13 kHz and peak to peak amplitude of 4 kV. Time series of current intensity and voltage values were acquired to determine the power injected into the surface DBD micro plasma. Optical emission spectroscopy was used to get information on reactive species generated by micro plasma in the gaseous phase. The reactive species generated in water during the discharge-on and discharge-off periods were investigated by means of UV absorption spectroscopy. The measurements showed that the concentration of these reactive species rise not only during the discharge-on time, but also during discharge-off time for a few tenths of minutes. This observation points towards an optimization scheme of the treatment, which uses discharge on/off steps.

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Authors and Affiliations

  1. Faculty of Physics, Iasi Plasma Advanced Research Center (IPARC), Alexandru Ioan Cuza University of Iasi, Blvd. Carol I nr. 11, 700506, Iasi, Romania

    Adina Dascalu, Alexandra Besleaga & Lucel Sirghi

  2. Organization for Innovation and Social Collaboration, Shizuoka University, 3-5-1, Naka-ku, Johoku, Hamamatsu, Shizuoka, 432-8561, Japan

    Kazuo Shimizu

Authors
  1. Adina Dascalu
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  2. Alexandra Besleaga
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  3. Kazuo Shimizu
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  4. Lucel Sirghi
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Corresponding author

Correspondence to Lucel Sirghi .

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Editors and Affiliations

  1. Department of Physics, Faculty of Mathematics and Natural Sciences, Kaunas University of Technology, Kaunas, Lithuania

    Giedrius Laukaitis

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Dascalu, A., Besleaga, A., Shimizu, K., Sirghi, L. (2019). Activation of Water by Surface DBD Micro Plasma in Atmospheric Air. In: Laukaitis, G. (eds) Recent Advances in Technology Research and Education. INTER-ACADEMIA 2018. Lecture Notes in Networks and Systems, vol 53. Springer, Cham. https://doi.org/10.1007/978-3-319-99834-3_13

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