Inorganic species formation in a discharged water generating system

Abstract

Inorganic species formation in a discharged water generating (DWG) system consisting of a plane-to-plane electrode arrangement with a 20 W 20 mA and 1 kHz power source has been investigated. The DWG system is able to produce the various oxidants HNO(2), HNO(3) and O(3), as well as OH radicals and many other unconfirmed radicals. These products can play an important role in the advanced oxidation of organic compounds and in rot protection. The pH of water discharged from the system for 20 min during inflow of natural air was about 3, nitrogen concentrations of nitrite and nitrate were 4.6 mg/L and 7.9 mg/L, respectively, residual dissolved ozone concentration was 0.7 mg/L and the oxidation power as measured by KI titration methods was approximately equivalent to 46 mg-O(3)/L. (C) 2009 Elsevier B.V. All rights reserved.