Miniaturizing Wet Scrubbers for Aerosolized Droplet Capture.
Miniaturizing Wet Scrubbers for Aerosolized Droplet Capture.
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DOI：
10.1021/acs.analchem.1c01296
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发表时间：
2021-08-24
影响因子：
7.4
通讯作者：
Berthier, Erwin
中科院分区：
文献类型：
--
作者：
Lee, Ulri N.;van Neel, Tammi L.;Lim, Fang Yun;Khor, Jian Wei;He, Jiayang;Vaddi, Ravi S.;Ong, Angelo Q. W.;Tang, Anthony;Berthier, Jean;Meschke, John S.;Novosselov, Igor, V;Theberge, Ashleigh B.;Berthier, Erwin
通过空气分散和传播的气溶胶（例如，颗粒物污染、生物气溶胶）是普遍存在的，并且是有害健康影响和疾病传播的主要原因之一。各种采样方法（例如，过滤器、旋风分离器、撞击器），以评估个人接触情况。然而，对于没有收集空气传播样本的经验或培训的人来说，在这些技术的可获得性和易用性方面仍然存在差距。另外，湿式洗涤器（大型非便携式工业系统）利用液体喷雾来从空气中去除气溶胶;目标是“洗涤”（即，清洁）工业烟囱的废气，而不是收集气溶胶进行分析。受湿式洗涤器的启发，我们开发了一种与现有便携式空气采样器根本不同的设备，该设备使用雾化微滴来捕获个人空间中的气溶胶（例如，家庭、办公室、学校）。我们的气溶胶采样设备只有一个小茶壶大小，无需专门培训即可操作，并具有在过饱和相对湿度环境中使液滴生长的弯曲流路。集成的开放式介观流体通道将聚结的液滴穿梭到收集室用于随后的样品分析。在这里，我们提出了气溶胶捕获到水滴的实验演示。迭代研究优化了非线性流动操纵挡板，并使83%的雾化微滴保留在我们的设备的有限体积中。作为将气溶胶捕获到液体介质中的概念验证，使用0.5-3 μm模型颗粒来评估气溶胶捕获效率。最后，我们证明了该设备可以捕获并保持生物气溶胶（噬菌体MS 2）的下游分析。
Aerosols dispersed and transmitted through the air (e.g., particulate matter pollution, bioaerosols) are ubiquitous and one of the leading causes of adverse health effects and disease transmission. A variety of sampling methods (e.g., filters, cyclones, impactors) have been developed to assess personal exposures. However, a gap still remains in the accessibility and ease-of-use of these technologies for people without experience or training in collecting airborne samples. Additionally, wet scrubbers (large non-portable industrial systems) utilize liquid sprays to remove aerosols from the air; the goal is to “scrub” (i.e., clean) the exhaust of industrial smokestacks, not collect the aerosols for analysis. Inspired by wet scrubbers, we developed a device fundamentally different from existing portable air samplers by using aerosolized microdroplets to capture aerosols in personal spaces (e.g., homes, offices, schools). Our aerosol-sampling device is the size of a small teapot, can be operated without specialized training, and features a winding flow path in a supersaturated relative humidity environment enabling droplet growth. The integrated open mesofluidic channels shuttle coalesced droplets to a collection chamber for subsequent sample analysis. Here, we present the experimental demonstration of aerosol capture into water droplets. Iterative study optimized the non-linear flow manipulating baffles and enabled an 83% retention of the aerosolized microdroplets in the confined volume of our device. As a proof-of-concept for aerosol capture into a liquid medium, 0.5–3 μm model particles were used to evaluate aerosol capture efficiency. Finally, we demonstrate the device can capture and keep a bioaerosol (bacteriophage MS2) viable for downstream analysis.
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DOI：
10.1073/pnas.1302566110
发表时间：
2013-06-18
影响因子：
11.1
作者：
Casavant, Benjamin P.;Berthier, Erwin;Beebe, David J.
通讯作者：
Beebe, David J.
影响因子：
7.4
作者：
Davis, Justin;Tiwari, Kartik;Novosselov, Igor
通讯作者：
Novosselov, Igor
影响因子：
3.7
作者：
He J;Beck NK;Kossik AL;Zhang J;Seto E;Meschke JS;Novosselov I
通讯作者：
Novosselov I
影响因子：
15.5
作者：
Gordon, Julian;Gandhi, Prasanthi;Gilbert, Jack A.
通讯作者：
Gilbert, Jack A.
影响因子：
9.9
作者：
CLEAVER, JW;YATES, B
通讯作者：
YATES, B