Graduate School of Biosphere Science, Hiroshima University, 1-7-1, Kagamiyama, Higashi-Hiroshima 739-8521, Japan; Department of Chemistry, Federal University of Technology, P.M.B. 704, Akure, Ondo State, Nigeria.
Graduate School of Biosphere Science, Hiroshima University, 1-7-1, Kagamiyama, Higashi-Hiroshima 739-8521, Japan.
Sci Total Environ. 2020 Dec 1;746:141186. doi: 10.1016/j.scitotenv.2020.141186. Epub 2020 Jul 23.
Airborne infectious diseases such as the new Coronavirus 2019 (COVID-19) pose serious threat to human health. Indoor air pollution is a problem of global environmental concern as well. Singlet oxygen (O) is a reactive oxygen species that plays important role in bacteria/virus inactivation and pollutant degradation. In this study, we found that commercially available filters typically deployed in air purifier and air conditioning units, when impregnated with Rose Bengal (RB) as a O sensitizer, can be used for heterogeneous gas-phase generation of O. It was confirmed that irradiation of the RB filter under oxygen gas stream produced O, which was measured using furfuryl alcohol trapping method followed by HPLC analysis. It was also observed that the amount of O generated increases as the light intensity increased. Similarly, the sensitizer loading also positively influenced the O generation. The heterogeneous gas-phase generation of O can find potential applications in air purifier and air conditioning units for the purpose of bacteria/virus inactivation and/or pollutant degradation thereby improving indoor air quality.
空气传播传染病，如新型冠状病毒 2019（COVID-19），对人类健康构成严重威胁。室内空气污染也是一个全球性的环境问题。单线态氧（O）是一种活性氧，在细菌/病毒失活和污染物降解方面发挥着重要作用。在这项研究中，我们发现，商用空气净化器和空调机组中常用的过滤器，当浸渍玫瑰红（RB）作为 O 敏化剂时，可以用于非均相气相生成 O。已经证实，在氧气气流下照射 RB 过滤器会产生 O，这可以通过糠醛醇捕获法和 HPLC 分析来测量。还观察到，随着光强度的增加，生成的 O 的量增加。同样，敏化剂的负载也对 O 的生成有积极影响。O 的非均相气相生成可以在空气净化器和空调机组中找到潜在的应用，用于细菌/病毒失活和/或污染物降解，从而改善室内空气质量。
