Investigation on the long-term bactericidal effect and chemical composition of radical-activated water

被引：26

作者：

Iwata, Naoyuki ^{[1
]}

Gamaleev, Vladislav ^{[1
]}

Oh, Jun-Seok ^{[2
]}

Ohta, Takayuki ^{[1
]}

Hori, Masaru ^{[3
]}

Ito, Masafumi ^{[1
]}

机构：

[1] Meijo Univ, Fac Sci & Technol, Dept Elect & Elect Engn, Nagoya, Aichi, Japan

[2] Osaka City Univ, Grad Sch Engn, Dept Phys Elect & Informat, Osaka, Japan

[3] Nagoya Univ, Ctr Low Temp Plasma Sci, Nagoya, Aichi, Japan

来源：

PLASMA PROCESSES AND POLYMERS | 2019年 / 16卷 / 10期

基金：

日本学术振兴会;

关键词：

bactericidal efficacy; nitric oxide; radical-activated water; reactive oxygen and nitrogen species; UV absorption; PLASMA; INACTIVATION; ACID;

D O I：

10.1002/ppap.201900055

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We treat deionized water using an atmospheric-pressure radical source to investigate the role of neutral radicals in the bactericidal efficacy of radical-activated water (RAW). The bactericidal efficacy of RAW is investigated using a colony-forming unit assay with Escherichia coli. Both the bactericidal efficacy and reactive oxygen and nitrogen species (RONS) concentration in stored RAW are investigated over a period of a month. E. coli was completely sterilized even in RAW stored for 7 days, indicating the strong bactericidal effect. However, deterioration of the bactericidal efficacy of RAW stored for 14 days is confirmed, which does not have a clear correlation with the time evolution of the RONS concentration. This result becomes a strong evidence that RAW has long-term bactericidal efficacy.

引用

页数：9

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