Resuspension

Ferro, A.

doi:10.1007/978-981-10-5155-5_11-1

Cited by 3 publications

(5 citation statements)

References 52 publications

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“…Existing resuspension models can be applied to determine the resuspension rate of settled particles due to human walking. However, the parameter values for the models vary widely [6,7] and parameter values specifically for viruses have not been determined [48]. Our model using parameter values from the literature resulted in lower resuspension rates than what we observed.…”

Section: Discussionmentioning

confidence: 66%

“…(6) The investigator performed a walking activity across the room for 20 min to resuspend the particles from the floor. (7) The investigator left the room and the room was left untouched overnight. (8) Impingers IMP-1r, IMP-2r, and IMP-3r were turned off after approximately 5.5 h and remained undisturbed for approximately 10 h. ( 9) Resuspension activity samples were collected and transferred the following morning to perform the viral RNA extraction and PCR analysis.…”

Section: Experimental Protocol For Initial Virus Emission and Resuspe...mentioning

confidence: 99%

“…Because resuspension is strongly dependent on particle size and the viral surface loading estimates are not size-resolved, we used the size distribution for the initial nebulized virus emission (Figures S1 and S2) to divide the measured viral surface loading results into different size bins (nominal particle diameters of 0.8, 1.8, 3.5, and 5.5 µm). We selected resuspension fraction values toward the center of the range for non-biological particles, as summarized by Ferro (2022) [7]. These were 5.0 × 10 −5 , 1.0 × 10 −4 , 5.0 × 10 −4 , and 1.0 × 10 −3 for nominal particle diameters of 0.8, 1.8, 3.5, and 5.5 µm, respectively.…”

Section: Resuspension Modelingmentioning

confidence: 99%

“…Many studies have been conducted to characterize particle resuspension from human activity [7]. Summarizing the resuspension emission rates reported by previous studies, [7] showed that emission rates vary over several orders of magnitude, even for the same size particles. For example, the reported resuspension emission rates for 1 µm particles range from 10 −2 to 10 2 mg min −1 for full-scale studies.…”

Section: Introductionmentioning

confidence: 97%

“…Human activities such as walking, sitting on furniture, and cleaning can resuspend settled particles back into the air [6]. Many studies have been conducted to characterize particle resuspension from human activity [7]. Summarizing the resuspension emission rates reported by previous studies, [7] showed that emission rates vary over several orders of magnitude, even for the same size particles.…”

Section: Introductionmentioning

confidence: 99%

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Resuspension of Seeded Particles Containing Live Influenza A Virus in a Full-Scale Laboratory

et al. 2023

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Many respiratory viruses, including influenza and SARS-CoV-2, are transmitted via the emission and inhalation of infectious respiratory aerosols in indoor environments. Resuspended particles from indoor surfaces and clothing can be a major source of airborne microbiological contaminants in indoor environments; however, it is unknown whether resuspended viruses contribute substantially to disease transmission. In this study, we investigated the resuspension via human walking activity of influenza A virus H3N2 laboratory strain, which was generated through a nebulizer into a sealed, unventilated biosafety level 2 (BSL-2) laboratory. The mean airborne viral concentrations following the resuspension events (3.7×103 viral RNA copies m−3) were two orders of magnitude lower than those following direct emission via the nebulizer (1.1×105 viral RNA copies m−3). The calculated resuspension emission factor (normalized ratio of the airborne mass to mass available for resuspension on the surface) of 10−3 was similar to reported values for 1–2 μm particles. Thus, depending on the infectious dose and viability of the virus, resuspension of settled respiratory viruses could lead to transmission, but the risk appears to be much lower than for direct respiratory emissions. To our knowledge, this is the first full-scale experimental study designed to quantify virus resuspension.

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Section: Discussionmentioning

confidence: 66%

Section: Experimental Protocol For Initial Virus Emission and Resuspe...mentioning

confidence: 99%

Section: Resuspension Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Resuspension of Seeded Particles Containing Live Influenza A Virus in a Full-Scale Laboratory

et al. 2023

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Dust resuspension rates in Kuwait: insights from 7Be and 137Cs radionuclides

Aba,

Al-Dousari,

Ismaeel

et al. 2024

Environ Sci Pollut Res

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Improving the forecast of fine dust emission and transmission from cattle barns: a comprehensive data package and analysis

Mostafa,

Paßmann,

Abdellatif

et al. 2024

Environ Sci Eur

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The livestock sector emits harmful gases and bioaerosols, impacting animals, plants, and human health. Ventilation systems in livestock buildings disperse polluted air, affecting nearby air quality depending on the wind patterns and atmospheric stability. Understanding pollutant emission and transmission is crucial for environmental mitigation. This study focuses on fine dust dispersion from dairy cattle buildings. Chemical and microscopic analyses were conducted to identify the cattle barn dust sources. Particle mass emissions were quantified by measuring particle mass concentrations and air volume flow using the tracer gas decay method. Seasonal and daily effects on dust emissions were studied. Remarkably, particle emissions remained below prescribed values in Germany. Additionally, particle transmission, including resuspension and adsorption parameters, was investigated using a developed wind tunnel. Resuspension measurements revealed minimal resuspended particle mass due to low ground wind speeds. Notably, wheat, as a model plant, exhibited high adsorption rates, which increased with particle size. Overall, the findings for resuspension and adsorption parameters provide an initial database for understanding fine dust transmission from cattle barns.

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Resuspension

Cited by 3 publications

References 52 publications

Resuspension of Seeded Particles Containing Live Influenza A Virus in a Full-Scale Laboratory

Resuspension of Seeded Particles Containing Live Influenza A Virus in a Full-Scale Laboratory

Dust resuspension rates in Kuwait: insights from 7Be and 137Cs radionuclides

Improving the forecast of fine dust emission and transmission from cattle barns: a comprehensive data package and analysis

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