Effects of cold plasma and UV-C radiation on isotonic solution

The possibility of hypochlorite formation by treating a 0.9% NaCl aqueous solution (isotonic solution) with pulsed UV-C radiation from a weakly ionized plasma of air spark discharge, continuous UV-C radiation from a low-pressure mercury lamp, or cold plasma of flash corona discharge has been explored in flow and batch modes. The mechanisms of reverse reactions in which the product hypochlorite is consumed have been analyzed. It has been shown that the reverse reaction is interrupted in the case of short-term contact of the processed liquid with flash discharge plasma; as a result, hypochlorite accumulates.