Influence of removal time and particle size on the particle substrate adhesion force

Felicetti, Marcos Alceu; Piantino, F.; Coury, José Renato; Aguiar, Mônica Lopes

doi:10.1590/s0104-66322008000100009

Cited by 18 publications

(11 citation statements)

References 18 publications

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“…Consequently, the ratio of dislodging forces to adhesion forces is expected to increase with increasing particle size. Such behavior is consistent with theory and with prior experimental observations …”

Section: Resultssupporting

confidence: 92%

Clothing as a transport vector for airborne particles: Chamber study

Licina

Nazaroff

2018

Indoor Air

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Strong evidence suggests that clothing serves as a reservoir of chemical pollutants and particles, including bioaerosols, which may have health significance. However, little is known about the role that clothing may play as a transport vector for inhaled airborne particles. Here, we contribute toward bridging the knowledge gap by conducting experiments to investigate clothing release fraction (CRF), determined as the size-dependent ratio of released to deposited particulate matter in the diameter range 0.5-10 μm. In a fully controlled chamber with low background particle levels, we deployed a programmable robot to reproducibly quantify the size-dependent CRF as a function of motion type and intensity, dust loadings, and activity duration. On average, 0.3%-3% of deposited particles were subsequently released with fabric motion, confirming that clothing can act as a vehicle for transporting airborne particles. The CRF increased with the vigor of movement and with dust loading. Rubbing and shaking the fabric were more effective than fabric stretching in resuspending particles. We also found that most of the release happened quickly after the onset of the resuspension activity. Particle size substantially influenced the CRF, with larger particles exhibiting higher values.

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Section: Resultssupporting

confidence: 92%

Clothing as a transport vector for airborne particles: Chamber study

Licina

Nazaroff

2018

Indoor Air

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“…Also, literature reports fluctuations (increase and decrease) in the flavonoid content as a function of time for aqueous ethanol extracts. It was hypothesized that increased time increased adhesion of diffused particles (flavonoid) around the cell walls of the supporting material (glass or plastic tubes) where extraction was conducted, which may hinder extraction 54 .…”

Section: Influence Of Extraction Parameters On Concentrations Of Flavmentioning

confidence: 99%

Influence of Acidity and Extraction Time on the Recovery of Flavonoids from Grape Skin Pomace Optimized by Response Surface Methodology

Putnik

Kovačević

Radojčin

et al. 2017

Chem.Biochem.Eng.Q.

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Grape pomace is recognized as an economical source for the recovery of a large number of biologically active compounds, such as polyphenols. Grape pomace extracts can be successfully used as raw material for functional foods production, since they are generally recognized as safe for the food industry. This study aimed to quantify the amounts of recovered flavonoids (total flavonoids, proanthocyanidins, anthocyanins, and flavonols) from grape skin pomace (Vitis vinifera L. cv. Merlot) under conventional extraction with different acidities (0.5 % -1 % HCl) and lengths of extraction time (30-60 minutes). The grand average values in this study were as follows: (i)

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“…Before soil moisture effects can be incorporated, the accuracy of the cohesive force parameterization must be assessed. Due to the limited understanding of this force and due to large variability in the data available from literature [e.g., Zimon , ; Felicetti et al , ], no precise accuracy estimate can be provided. To evaluate the dust flux uncertainties arising from the cohesive force, a sensitivity experiment is conducted.…”

Section: Effects Of Soil Moisture and Surface Roughness On Dust Emissionmentioning

confidence: 99%

Further development of a parameterization for convective turbulent dust emission and evaluation based on field observations

Klose

Shao

et al. 2014

JGR Atmospheres

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Further developments of a parameterization scheme for convective turbulent dust emission (CTDE) are presented. The scheme is advanced by including (1) a new statistical description of instantaneous momentum flux, (2) a correction function for cohesive force to account for the effect of soil moisture, and (3) a correction function for lifting force to consider the effect of vegetation roughness elements. The probability density function describing instantaneous momentum flux is now derived from large-eddy simulations for different atmospheric stabilities. The vegetation correction function is based on a drag partition theory. Additional improvements on the representations of interparticle cohesive force and particle size distribution are introduced. The new CTDE scheme is tested against the field data obtained at a sand storm monitoring station in the Horqin Sandy Land in China in 2011 and during the Japan-Australia Dust Experiment in Australia in 2006.

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Influence of removal time and particle size on the particle substrate adhesion force

Cited by 18 publications

References 18 publications

Clothing as a transport vector for airborne particles: Chamber study

Clothing as a transport vector for airborne particles: Chamber study

Influence of Acidity and Extraction Time on the Recovery of Flavonoids from Grape Skin Pomace Optimized by Response Surface Methodology

Further development of a parameterization for convective turbulent dust emission and evaluation based on field observations

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