Air-supplied pinhole discharge in aqueous solution for the inactivation of Escherichia coli
| Autor: | Koichi Yasuoka, Ryota Suganuma |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Nitrous acid Aqueous solution Physics and Astronomy (miscellaneous) Radical General Engineering General Physics and Astronomy 02 engineering and technology Sterilization (microbiology) 021001 nanoscience & nanotechnology medicine.disease_cause 01 natural sciences Volumetric flow rate chemistry.chemical_compound chemistry 0103 physical sciences Sodium citrate medicine 0210 nano-technology Hydrogen peroxide Escherichia coli Nuclear chemistry |
| Zdroj: | Jpn. J. Appl. Phys.. 57(no. 4) |
| Popis: | An air-supplied pinhole discharge in aqueous solution has been developed to provide a short-lived and odorless bactericide to replace current conventional disinfectants such as O3, ClO−, HClO, and ClO2. The pinhole discharge that was initiated inside a water bubble generated hydrogen peroxide (H2O2) and nitrous acid (HNO2) simultaneously. The concentrations of H2O2, HNO2, and HNO3 were 16.3, 13.9, and 17.4 mg/L, respectively when flow rates of NaCl solution and air were 72 and 12.5 mL/min, respectively. The pH value of the solution was 3.87, and HO2 radicals were generated from the reaction of H2O2 with HNO2. The efficacy of sterilization of discharge-treated water was evaluated by changing the acetic solutions. A 4-orders-of-magnitude decrease in Escherichia coli survival rate was observed after treatment with a sodium citrate solution of pH 3.2 for 60 s. |
| Databáze: | OpenAIRE |
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