Ruđer Bošković Institute, Laboratory fot Physical Oceanography and Chemistry od Aquatic Systems, Division for Marine and Environmental Research, Zagreb, Croatia.
Ruđer Bošković Institute, Laboratory fot Physical Oceanography and Chemistry od Aquatic Systems, Division for Marine and Environmental Research, Zagreb, Croatia.
Environ Res. 2021 Jul;198:111215. doi: 10.1016/j.envres.2021.111215. Epub 2021 Apr 30.
Surface active substances (SAS) have the potential to form films at different interfaces, consequently influencing the interfacial properties of atmospheric particulate matter (PM). They can be derived from both human activities and natural processes and can be found in an indoor and outdoor environment. This paper's fundamental question is the possible role of the SAS in stabilizing respiratory aerosols in the closed space. In that context, we discuss results of preliminary measurements of the SAS and dissolved organic carbon (DOC) concentrations in the water-soluble fractions of PM and PM that were sampled simultaneously in primary school inside and outside of the building. The concentrations of SAS were determined using highly sensitive electrochemical measurements. It was observed that SAS and DOC concentrations have been enhanced indoor in both PM fractions. Consistent with these results, a discussion arises on the possibility that SAS could play a crucial role in respiratory droplet dispersion as stabilizers, especially in a closed space. At the same time, we assume that they could prolong the lifetime of respiratory aerosols and as well viability of some (possible SARS-CoV-2) virus inside of the droplets.
表面活性物质（SAS）有可能在不同的界面形成薄膜，从而影响大气颗粒物（PM）的界面性质。它们可以源自人类活动和自然过程，并且可以在室内和室外环境中找到。本文的基本问题是 SAS 在稳定封闭空间中呼吸性气溶胶方面的可能作用。在这种情况下，我们讨论了同时在建筑物内外的小学采集的 PM 和 PM 的水溶性部分中 SAS 和溶解有机碳（DOC）浓度的初步测量结果。使用高灵敏度的电化学测量方法来确定 SAS 的浓度。结果表明，两种 PM 部分的室内 SAS 和 DOC 浓度都有所增加。与这些结果一致，人们开始讨论 SAS 作为稳定剂在呼吸飞沫分散中可能发挥关键作用，特别是在封闭空间中。同时，我们假设它们可以延长呼吸性气溶胶的寿命，并延长飞沫内某些（可能是 SARS-CoV-2）病毒的存活时间。
