Particle deposition onto people in a transit venue [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 574.5 [Unassigned]
• Thông tin xuất bản: Argonne, Ill. : Oak Ridge, Tenn. : Argonne National Laboratory ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2016
• Mô tả vật lý: Size: p. 237-249 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 262035
• Chủ đề: 1. 59 basic biological sciences; 2. 60 applied life sciences; 3. Bioterrorism; 4. Fomite transport; 5. Particle deposition

Tóm tắt

Following the release of an aerosolized biological agent in a transit venue, material deposited on waiting passengers and subsequently shed from their clothing may significantly magnify the scope and consequences of such an attack. Published estimates of the relevant particle deposition and resuspension parameters for complex, real-world environments such as a transit facility are non-existent. In this study, measurements of particle deposition velocity onto cotton fabric samples affixed to stationary and walking persons in a large multimodal transit facility were obtained for tracer particle releases carried out as part of a larger study of subway airflows and particulate transport. Deposition velocities onto cotton and wool were also obtained using a novel automated sampling mechanism deployed at locations in the transit facility and throughout the subway. The data revealed higher deposition velocities than have been previously reported for people exposed in test chambers or office environments. Furthermore, the relatively high rates of deposition onto people in a transit venue obtained in this study suggest it is possible that fomite transport by subway and commuter/regional rail passengers could present a significant mechanism for rapidly dispersing a biological agent throughout a metropolitan area and beyond.