Possibilities of Corona Electric Discharge for Deep Purification of Drinking Water from Phenol and Tetracycline.

Here, we have studied the purification of water from phenol and tetracycline by oxidation with ozone and hydroxyl radicals generated in a corona electric discharge. Liquid circulation has been used to process large volumes. It has been established that tetracycline decomposes from a concentration of 11 mg/L to (1.7 ± 0.3) × 10⁻³ mg/L at a dose of 140 J/50 mL. Phenol decomposes more slowly, the oxidation rate decreases at low residual concentrations. The phenol concentration decreases from 13 mg/L to (27 ± 5) × 10⁻³ mg/L at a dose of 5 × 10⁴ J/50 mL. The reasons for the strong decrease in the rate of phenol oxidation at low concentrations in the case of oxidation by hydroxyl radicals are analyzed. [ABSTRACT FROM AUTHOR]