Application of bipolar plasma discharge over the liquid surface for water purification from chemical and bacterial pollution

Abstract

Recently, interest in the research of discharges above the liquid surface has increased significantly. This is not only because of the variety of related processes occurring in the gas above the liquid surface, in the liquid itself, and at the liquid-gas interface [1]. In the first place, this interest is due to a physicochemical effect of discharge upon the liquid, which enables an effective purification of water from chemical and bacteriological pollution. For this, in most cases, high-voltage unipolar pulses with amplitudes up to 30 kV at a pulse duration τ ≤ 200 ns are used. We might reasonably expect the discharge with a variable polarity at higher electric voltage amplitudes to effect more essentially.