Emissions from Hydrogen Peroxide Disinfection and Their Interaction with Mask Surfaces
Emissions from Hydrogen Peroxide Disinfection and Their Interaction with Mask Surfaces
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DOI：
10.1021/acsengineeringau.3c00036
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发表时间：
2024-01-09
期刊：
影响因子：
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通讯作者：
Ruiz，Lea Hildebrandt
中科院分区：
文献类型：
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作者：
Abue，Pearl;Bhattacharyya，Nirvan;Ruiz，Lea Hildebrandt
由于 COVID-19 大流行以及戴面罩的人数增加，空间消毒量增加。过氧化氢是推荐用于对抗病毒的消毒剂之一。先前的研究调查了与空间和口罩消毒相关的过氧化氢排放量；然而，这些研究并未关注这些过程中排放的副产品。在这里，我们使用环境室来模拟室内空间中存在戴口罩的人时用 H2O2 进行消毒的情况，该环境室的呼吸区上有一个戴着口罩的热人体模型。我们注入过氧化氢对空间进行消毒，并利用化学电离质谱仪 (CIMS) 测量主要消毒剂 (H2O2)，并使用 Vocus 质子转移反应飞行时间质谱仪 (Vocus PTR-ToF-MS) 测量消毒副产物，比较室内和面罩后面的浓度。消毒后 2-4 小时内，室内和口罩后面的主要消毒剂和副产物的浓度仍高于背景水平，表明存在长期暴露的可能性，特别是在继续佩戴口罩时。总体而言，我们的研究结果表明，口罩对消毒剂及其副产物的浓度具有随时间变化的影响，并且在接触高浓度的化合物后需要定期更换口罩。
A rise in the disinfection of spaces occurred as a result of the COVID-19 pandemic as well as an increase in people wearing facial coverings. Hydrogen peroxide was among the recommended disinfectants for use against the virus. Previous studies have investigated the emissions of hydrogen peroxide associated with the disinfection of spaces and masks; however, those studies did not focus on the emitted byproducts from these processes. Here, we simulate the disinfection of an indoor space with H2O2while a person wearing a face mask is present in the space by using an environmental chamber with a thermal manikin wearing a face mask over its breathing zone. We injected hydrogen peroxide to disinfect the space and utilized a chemical ionization mass spectrometer (CIMS) to measure the primary disinfectant (H2O2) and a Vocus proton transfer reaction time-of-flight mass spectrometer (Vocus PTR-ToF-MS) to measure the byproducts from disinfection, comparing concentrations inside the chamber and behind the mask. Concentrations of the primary disinfectant and the byproducts inside the chamber and behind the mask remained elevated above background levels for 2–4 h after disinfection, indicating the possibility of extended exposure, especially when continuing to wear the mask. Overall, our results point toward the time-dependent impact of masks on concentrations of disinfectants and their byproducts and a need for regular mask change following exposure to high concentrations of chemical compounds.