Revisiting the size selective performance of EPA's high-volume total suspended particulate matter (Hi-Vol TSP) sampler
Revisiting the size selective performance of EPA's high-volume total suspended particulate matter (Hi-Vol TSP) sampler
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DOI：
10.1080/02786826.2017.1316358
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发表时间：
2017-01-01
影响因子：
5.2
通讯作者：
Vanderpool, Robert W.
中科院分区：
文献类型：
--
作者：
Krug, Jonathan D.;Dart, Andrew;Vanderpool, Robert W.
根据国家环境空气质量标准（NAAQS），空气中铅的测量是通过大体积总悬浮颗粒物（Hi-Vol TSP）采样器进行的。在1973年至1983年的十年间，有12篇出版物探讨了Hi-Vol TSP的采样特征和有效性，但其性能仍然存在不确定性。本文概述了有关高体积TSP性能的现有文献，并根据四个因素确定了报告的采样器有效性：粒径（报告有效性为7%-100%）、风速（-36%至100%）、采样器方向（7%-100%）和运行状态（107%-140%）。在受控风洞环境中用固体多分散气溶胶评估了高体积TSP的有效性。等速采样器与Hi-Vol TSP一起部署，对空气动力学直径从5到35 μ m的气溶胶进行了三种风速（2、8和24km h(-1)）、三种采样器方向（0度、45度、90度）和两种工作状态（开、关）的研究。结果表明，颗粒直径是影响有效性的最大因素，其次是风速。采样器的方向在2和8km h（-1）时没有显著影响，但在24km h（-1）时有显著影响。在被动状态下，根据颗粒大小和风速的不同，Hi-Vol TSP收集了1%至7%的可用气溶胶。本研究的结果并不否定以往的研究结果，而是有助于我们对Hi-Vol TSP的尺寸选择性能的整体理解。虽然结果与以前的研究普遍一致，但发现Hi-Vol TSP对这四个因素的依赖性比以前报道的要小。(c) 2017年美国气溶胶研究协会
Under the National Ambient Air Quality Standard (NAAQS) for airborne lead, measurements are conducted by means of a high-volume total suspended particulate matter (Hi-Vol TSP) sampler. In the decade between 1973 and 1983, there were 12 publications that explored the sampling characteristics and effectiveness of the Hi-Vol TSP, yet there persists uncertainty regarding its performance. This article presents an overview of the existing literature on the performance of the Hi-Vol TSP, and identifies the reported sampler effectiveness with respect to four factors: particle size (reported effectiveness of 7%-100%), wind speed (-36% to 100%), sampler orientation (7%-100%), and operational state (107%-140%). Effectiveness of the Hi-Vol TSP was evaluated with a solid, polydisperse aerosol in a controlled wind tunnel setting. Isokinetic samplers were deployed alongside the Hi-Vol TSP to investigate three wind speeds (2, 8, and 24km h(-1)), three sampler orientations (0 degrees, 45 degrees, 90 degrees), and two operational states (on, off) for aerosols with aerodynamic diameters from 5 to 35 mu m. Results indicate that particle diameter was the largest determining factor of effectiveness followed by wind speed. Orientation of the sampler did not have a significant effect at 2 and 8km h(-1) but did at 24km h(-1). In a passive state, the Hi-Vol TSP was collected between 1% and 7% of available aerosol depending on particle size and wind speed. Results of this research do not invalidate results of previous studies but rather contribute to our overall understanding of the Hi-Vol TSP's size-selective performance. While results generally agreed with previous studies, the Hi-Vol TSP was found to exhibit less dependence on these four factors than previously reported.(c) 2017 American Association for Aerosol Research