A review of particle resuspension

Nicholson, K.W.

doi:10.1016/0004-6981(88)90433-7

Cited by 248 publications

(112 citation statements)

References 23 publications

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“…A good correlation was found between ambient concentrations in the PM size fractions and temperature, which influences the atmospheric resuspension of PM. 42,43 The increase in ambient concentrations found for typical soil-related elements can be attributed to greater soil dryness in spring/ summer, which fosters the formation of mechanical particles and their lift up in the atmosphere.…”

Section: Chemical Characterization Of Fine and Coarsementioning

confidence: 99%

Particle Size Distributions and Elemental Composition of Atmospheric Particulate Matter in Southern Italy

Sprovieri

Pirrone

2008

Journal of the Air & Waste Management Association

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Three 2-wk seasonal field campaigns were performed in 2003 and 2004 at a sampling site on the southern Tyrrhenian coast of Italy with the aim to investigate the dynamics and characteristics of particle-bound pollutants in the Mediterranean area. Fine (PM 2.5 ) and coarse particulate matter (PM 10 -2.5 ) size fractions were collected by a manual dichotomous sampler on 37-mm Teflon filters over a 24-hr sampling period. On average, 70% of the total PM 10 (PM 2.5 ϩ PM 10 -2.5 ) mass was associated with the coarse fraction and 30% with the fine fraction during the three campaigns. The ambient concentrations of Pb, Ni, Cr, Zn, Mn, V, Cd, Fe, Cu, Ca, and Mg associated with both size fractions were determined by atomic absorption spectrometry. Ambient concentrations showed differences in their absolute value, ranging from few ng ⅐ m Ϫ3 to g ⅐ m Ϫ3

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Section: Chemical Characterization Of Fine and Coarsementioning

confidence: 99%

Particle Size Distributions and Elemental Composition of Atmospheric Particulate Matter in Southern Italy

Sprovieri

Pirrone

2008

Journal of the Air & Waste Management Association

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“…Extensive reviews of resuspension processes and the available models were reported by Healy (1977), Sehmel (19801, Smith et al (1982), Hinds (1982), and Nicholson (1988). Collections of recent studies concerning particle removal from various surfaces were provided by Mittal (1988Mittal ( , 1989Mittal ( , 1991Mittal ( , and 1993.…”

Section: Introductionmentioning

confidence: 99%

Flow-Induced Resuspension of Rigid-Link Fibers from Surfaces

Fan

Soltani

Ahmadi

et al. 1997

Aerosol Science and Technology

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ABSTRACT. Flow-induced removal of curly fibers from surfaces is studied. A generic rigid-link fiber model consisting of a chain of five ellipsoids with different orientations is developed, and used to study fiber resuspension in laminar and turbulent flows. The contact surfaces of the fiber with the wall are modeled as spherical joints. The hydrodynamic forces and torques acting on the ellipsoidal segments as well as the adhesion forces of nodes in contact with the surface are evaluated. Various possible modes of fiber detachment from the surface are identified, and the state of limiting equilibrium are analyzed. The critical velocities for detaching fibers of various sizes, orientations, and filament thicknesses are evaluated and discussed.

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“…Estimates of the reaerosolization potential were based on resuspension rates and resuspension factor determinations. Such estimates may provide useful data for predictive transport models (16).…”

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confidence: 99%

Reaerosolization of Fluidized Spores in Ventilation Systems

Krauter

Biermann

2007

Appl Environ Microbiol

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This project examined dry, fluidized spore reaerosolization in a heating, ventilating, and air conditioning duct system. Experiments using spores of Bacillus atrophaeus, a nonpathogenic surrogate for Bacillus anthracis, were conducted to delineate the extent of spore reaerosolization behavior under normal indoor airflow conditions. Short-term (five air-volume exchanges), long-term (up to 21,000 air-volume exchanges), and cycled (on-off) reaerosolization tests were conducted using two common duct materials. Spores were released into the test apparatus in turbulent airflow (Reynolds number, 26,000). After the initial pulse of spores (approximately 10 10 to 10 11 viable spores) was released, high-efficiency particulate air filters were added to the air intake. Airflow was again used to perturb the spores that had previously deposited onto the duct. Resuspension rates on both steel and plastic duct materials were between 10 ؊3 and 10 ؊5 per second, which decreased to 10 times less than initial rates within 30 min. Pulsed flow caused an initial spike in spore resuspension concentration that rapidly decreased. The resuspension rates were greater than those predicted by resuspension models for contamination in the environment, a result attributed to surface roughness differences. There was no difference between spore reaerosolization from metal and that from plastic duct surfaces over 5 hours of constant airflow. The spores that deposited onto the duct remained a persistent source of contamination over a period of several hours.The threat from a bioweapon agent such as anthrax remains problematic. Because of the biological, technical, and pathological characteristics of Bacillus anthracis, it is attractive as a bioweapon (2, 10). When used as a weapon of mass destruction, the agent is dispersed in particles less than 5 m in diameter, a size that allows penetration into the pulmonary alveoli (18). Minimal data on human infective doses for inhalational Bacillus anthracis are available (14,24,25). The problem is further compounded by variations in individual susceptibility, B. anthracis strain virulence and spore preparation technique, and physical characteristics of the bioparticle. Thus, studying the fate and transport of fluidized spore concentrations is necessary in order to better predict the area of contamination and to more accurately model potential health risk.Ventilation systems provide a conduit to contaminate a building and the surrounding area. Such systems can become entry points or distribution systems for hazardous contaminants, including biological weapon agents (BWA) (15). Air circulation in ordinary buildings can assist the spread of airborne disease and can disperse contaminants (11,22). Reaerosolization of these hazardous bioparticles deposited onto surfaces can be a continuing source of contamination. For example, a study of reaerosolization of B. anthracis after dispersal in a postal facility found that a mail sorter remained contaminated many days after processing B. anthracis-contaminated letters ...

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A review of particle resuspension

Cited by 248 publications

References 23 publications

Particle Size Distributions and Elemental Composition of Atmospheric Particulate Matter in Southern Italy

Particle Size Distributions and Elemental Composition of Atmospheric Particulate Matter in Southern Italy

Flow-Induced Resuspension of Rigid-Link Fibers from Surfaces

Reaerosolization of Fluidized Spores in Ventilation Systems

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