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Buttner, Mark P.; Cruz-Perez, Patricia; Garrett, Paula J.; Stetzenbach, Linda D.

doi:10.1023/a:1007513303358

Cited by 21 publications

(3 citation statements)

References 13 publications

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“…The performance characteristics of bioaerosol impingers have been evaluated and compared with those of other bioaerosol samplers in several field and laboratory studies published during the past decade: Macher and First (1984), Henningson and Fangmark (1987), Zimmerman et al (1987), Henningson et al (1988), Hering (1989), Kang and Frank (1989a,b), Buttner andStetzenbach (1990, Jensen et al (19921, Thorne et al (1992), Nevalainen et al (19931, Griffiths and DeCosemo (1994); Grinshpun et al (1994), Henningson and Ahlberg (1994), Juozaitis et al (1994). Since the early 1960s, some commercially available impingers have been proposed as reference bioaerosol samplers, e g , the AGI-30 was recommended by Brachman et al (1964) as a reference sampler.…”

Section: Introductionmentioning

confidence: 99%

Effect of Impaction, Bounce and Reaerosolization on the Collection Efficiency of Impingers

Grinshpun

Willeke

Ulevičius

et al. 1997

Aerosol Science and Technology

111

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ABSTRACT. The collection efficiency of liquid impingers was studied experimentally as a function of the sampling flow rate with test particles in the bacterial size range. Three impingers were tested: two All-Glass Impingers (AGI-4 and AGI-301, widely used for bioaerosol sampling, and a newly developed slot impinger. The aerosol particles were generated by a Collison nebulizer, and an Aerosizer was used to measure the particle concentrations and size distributions upstream and downstream of each impinger. The effect of the air pressure drop across the impinger on the Aerosizer performance was investigated, and the particle measurement system was modified and calibrated accordingly. While inertial impaction is the dominant particle removal mechanism in impingers, particle bounce and reaerosolization were also found to have significant effects on the impinger collection characteristics. At relatively high flow rates and low levels of collection fluid (corresponding to the collection fluid level after evaporation of most of the liquid during prolonged impingement), the liquid under the impinger jet was observed to be removed by the air pressure and pushed against the container's walls. Particles, such as bacterial or fungal spores, may thus bounce from the bottom of the collection vessel and escape with the effluentair flow or may impact sideways into the liquid that was previously pushed against the walls. It was found that such particle bounce may significantly reduce the collection efficiency of impingers containing a small amount of liquid. When the impingers were operated at a high level of collection fluid and sufficiently high sampling flow rates, it was observed that the bubbles, rising through the liquid, entrained previously collected particles and created new aerosols by bursting at the liquidair surface. Such particle reaerosolization was also found to reduce the impinger collection efficiency.

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Section: Introductionmentioning

confidence: 99%

Effect of Impaction, Bounce and Reaerosolization on the Collection Efficiency of Impingers

Grinshpun

Willeke

Ulevičius

et al. 1997

Aerosol Science and Technology

111

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“…These spores were well suited for this study because they are spherical with a diameter between approximately 1.0 and 3.0 lm, while most fungal spores have diameters between 2.0 and 10.0 lm (American Thoracic Society 1997). Buttner et al (1999) used P. chrysogenum in their studies on duct and floor materials, while Kildeso et al (2003) used P. chrysogenum in an experiment to determine the air velocities needed to release spores from wet building materials. Spores from the plates were harvested by flooding dishes with 1 g of 0.5-mm-diameter glass beads (BioSpec Products, Bartlesville, OK) and distilled water, shaking them for 10 s and pouring the suspension into a sterile vessel containing distilled water.…”

Section: Target Fungimentioning

confidence: 99%

“…Buttner et al (1999) demonstrated that HVAC (heating, ventilating, and air conditioning) systems in a laboratory setting have the potential to allow the movement of airborne spores into a simulated room. Airaksinen et al (2003) found that spore movement was possible through residential flooring held vertically between two chambers inside a laboratory.…”

Section: Introductionmentioning

confidence: 99%

Lateral fungal spore movement inside a simulated wall

Muise

Seo

2008

Aerobiologia

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Moisture inside walls can facilitate mold growth if left untreated. Once spores become airborne they may interact with pressures inside walls. Two laboratory experiments were conducted to determine if airborne spores have the potential to migrate laterally inside walls with and without wiring installations. A simulated wall was fabricated, and Penicillium chrysogenum spores were aerosolized into a distant stud bay and an adjacent stud bay. The wall was subjected to a typical indoor pressure. Spore levels inside the bays were sampled, and a total of 36 trials (n = 36) were conducted. Results of Kruskal-Wallis tests revealed that spore levels inside the sampling bay and the distant bay with wiring installations were not significantly different. Spore levels inside the sampling bay were significantly lower than the adjacent bay without wiring installations (P \ 0.05). The findings of the study suggest airborne fungal spores have the potential to move laterally inside walls.

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Spatiotemporal distribution and the passive dispersal of fungal spores through HVAC systems

Lin

Lee

et al. 2021

Aerobiologia

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Untitled

Cited by 21 publications

References 13 publications

Effect of Impaction, Bounce and Reaerosolization on the Collection Efficiency of Impingers

Effect of Impaction, Bounce and Reaerosolization on the Collection Efficiency of Impingers

Lateral fungal spore movement inside a simulated wall

Spatiotemporal distribution and the passive dispersal of fungal spores through HVAC systems

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