Disinfection by HO2 Radicals Generated by Negative Corona Discharge on Acidic Solution

An oxygen-supplied negative direct current (dc) corona discharge on acidic solution is studied to reduce the odor associated with conventional disinfectants, such as ClO − , HClO, O 3 , and ClO 2 . The discharge system provided an odorless bactericide of hydroperoxyl (HO 2 ) radicals, generated from...

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Published in:IEEE transactions on plasma science 2019-01, Vol.47 (1), p.346-349
Main Authors: Suganuma, R., Kawasaki, S., Yasuoka, K.
Format: Article
Language:English
Subjects:
Acidic solution
Corona
corona discharge
Deactivation
Direct current
Discharge
Discharges (electric)
Disinfectants
Disinfection
Disinfection & disinfectants
E coli
Electrodes
Escherichia coli (E. coli)
Hydrogen
Hydrogen peroxide
hydroperoxyl radical
Inactivation
Inductors
Microorganisms
Odors
Radicals
Stellar coronas
Superoxide dismutase
superoxide dismutase (SOD)
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Kawasaki, S.
Yasuoka, K.
description An oxygen-supplied negative direct current (dc) corona discharge on acidic solution is studied to reduce the odor associated with conventional disinfectants, such as ClO − , HClO, O 3 , and ClO 2 . The discharge system provided an odorless bactericide of hydroperoxyl (HO 2 ) radicals, generated from the reaction of discharge-generated \text{O}_{2}^{-} with H + in the acidic solution. A 2.5-log reduction of Escherichia coli (E. coli) was observed under the conditions of pH 2.8, dc −4.8-kV dc, and - 17\,\,\mu \text{A} , where the concentration of ozone and hydrogen peroxide was too low to inactivate the E. coli. At a pH of 5.6 or by adding a superoxide dismutase, which is a scavenger of HO 2 , negligible inactivation was observed.
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source IEEE Electronic Library (IEL) Journals
subjects Acidic solution
Corona
corona discharge
Deactivation
Direct current
Discharge
Discharges (electric)
Disinfectants
Disinfection
Disinfection & disinfectants
E coli
Electrodes
Escherichia coli (E. coli)
Hydrogen
Hydrogen peroxide
hydroperoxyl radical
Inactivation
Inductors
Microorganisms
Odors
Radicals
Stellar coronas
Superoxide dismutase
superoxide dismutase (SOD)
title Disinfection by HO2 Radicals Generated by Negative Corona Discharge on Acidic Solution
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