Deposition of tobacco smoke particles in a low ventilation room

Journal Article · Tue Feb 01 00:00:00 EST 1994 · Aerosol Science and Technology; (United States)

DOI:https://doi.org/10.1080/02786829408959676· OSTI ID:7234581

Xu, M; Nematollahi, M; Sextro, R G; Gadgil, A J ^[1]; Nazaroff, W W ^[2]

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1. Lawrence Berkeley Lab., CA (United States)
2. Univ. of California, Berkeley, CA (United States)

Deposition on indoor surfaces is an important removal mechanism for tobacco smoke particles. We report measurements of deposition rates of environmental tobacco smoke particles in a room-size chamber. The deposition rates were determined from the changes in measured concentrations by correcting for the effects of coagulation and ventilation. The airflow turbulent intensity parameter was determined independently by measuring the air velocities in the chamber. Particles with diameters < 0.25 [mu]m coagulate to form larger particles of sizes between 0.25 and 0.5 [mu]m. The effect of coagulation on the particles > 0.5 [mu]m was found to be negligible. Comparison between our measurements and calculations using the theory of Crump and Seinfeld (1981) showed smaller measured deposition rates for particles from 0.1 to 0.3 [mu]m in diameter and greater measured deposition rates for particles larger than 0.6 [mu]m at three mixing intensities. Comparison of Nazaroff and Cass' model (1989a) for natural convection flow showed good agreement with the measurements for particles > 0.1 [mu]m in diameter; however, measured deposition rates exceeded model predictions by a factor of approximately 4 for particles in size range of 0.05-0.1 [mu]m in diameter. These results were used to predict deposition of sidestream smoke particles on interior surfaces. 31 refs., 8 figs., 1 tab.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 7234581
• Journal Information: Aerosol Science and Technology; (United States), Vol. 20:2; ISSN 0278-6826
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
DEPOSITION
MATHEMATICAL MODELS
SMOKES
AEROSOLS
CONVECTION
FLOCCULATION
INDOOR AIR POLLUTION
TOBACCO PRODUCTS
TURBULENT FLOW
VENTILATION
AIR POLLUTION
COLLOIDS
DISPERSIONS
ENERGY TRANSFER
FLUID FLOW
HEAT TRANSFER
MASS TRANSFER
POLLUTION
PRECIPITATION
RESIDUES
SEPARATION PROCESSES
SOLS
540120* - Environment
Atmospheric- Chemicals Monitoring &amp; Transport- (1990-)
990200 - Mathematics &amp; Computers