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コンド マユミ
Mayumi Kondo
近土 真由美 所属 川崎医療福祉大学 医療技術学部 臨床工学科 職種 講師 |
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| 論文種別 | 研究論文（学術雑誌） |
| 言語種別 | 英語 |
| 査読の有無 | 査読あり |
| 表題 | Control of Airborne and Surface Microorganisms in Real Indoor Environments Using an Integrated System of Vaporized Free Chlorine Components and Filtration. |
| 掲載誌名 | 正式名：Microorganisms 略 称：Microorganisms ISSNコード：20762607/20762607 |
| 掲載区分 | 国外 |
| 巻・号・頁 | 13(9) |
| 著者・共著者 | Saki Kawahata, Mayumi Kondo, Atsushi Yamada, Naoya Shimazaki, Makoto Saito, Takayoshi Takano, Tetsuyoshi Yamada, Yoshinobu Shimayama, Shunsuke Matsuoka, Hirokazu Kimura |
| 発行年月 | 2025/09 |
| 概要 | Airborne and surface-residing microorganisms in indoor environments pose potential risks for infectious disease transmission. To address this issue, we developed a composite device combining a generator of vaporized free chlorine components with a fine particle removal filter. Field tests were conducted in occupied university classrooms to evaluate the device's efficacy in reducing airborne bacterial loads. Airborne bacteria were sampled under three operational conditions [Electrolyzed (+)/Filter (+), Electrolyzed (-)/Filter (+), and Electrolyzed (-)/Filter (-)]. Significant reductions in bacterial counts were observed in the Electrolyzed (+)/Filter (+) condition, with a residual rate of 14.5% after 2.25 h (p = 0.00001). Additionally, surface contact tests demonstrated that vaporized free chlorine components, primarily consisting of hypochlorous acid (HOCl), reduced viable counts of E. coli, P. aeruginosa, and S. aureus by 59.0-99.7% even at a distance of 8.0 m. The concentrations of vaporized free chlorine components during operation remained within safe exposure limits (0-19 ppb), consistent with the effective range reported in prior literature (10-50 ppb). Computational fluid dynamics simulations confirmed the diffusion of vaporized free chlorine components throughout the room, including distant sampling points. These findings suggest the combined use of a vaporized free chlorine generator and a particulate filter effectively reduces microbial contamination in indoor environments, providing a promising approach for infection control in residential and public settings. |
| DOI | 10.3390/microorganisms13092053 |
| PMID | 41011384 |
| researchmap用URL | https://www.ncbi.nlm.nih.gov/pubmed/41011384 |