Water Activated by Air Spark Plasma Radiation

The concentration of oxidative equivalents, formed in a 5-mL sample of water by the action of radiation from spark discharge plasma and products diffusing from the discharge region to the sample surface, has been investigated. Immediately after treatment for 3 min, the concentration of oxidative equivalents is 22.4 ± 2.5 (mmol eq)/L, decreasing to zero in 14 days. The redox potential of the treated water is 553 ± 5 mV. On the fourth to ninth day, the potential increases to 630 ± 10 mV. The acidity of water is pH 2.4–2.6. The energy expenditure for activating water by plasma radiation is less than that for activating by the plasma.