Experimental Study of the Aerosolization from a Carbon Nanotube Bulk by a Vortex Shaker

Bihan, Olivier Le; Ustache, Aurélien; Bernard, Daniel; Aguerre-Chariol, Olivier; Morgeneyer, Martin

doi:10.1155/2014/193154

Cited by 15 publications

(11 citation statements)

References 17 publications

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“…The theoretical relationship between the properties of a powder and its dustiness remains poorly understood so that further experimental works are required [3,11] .…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, they are capable of testing powders for different energy levels by varying vortex speed and time. Morgeneyer et al [3] and [11] used the VS method to study the effects of tester parameters on dust generation of micron-sized alumina particles and carbon nano-tubes (CNTs), respectively. In [3] , the effect of the VS speed and sample mass on the dust generated from alumina were studied whereas [11] dealt with the effect of change in tube diameter in addition to vortex speed on dustiness of CNTs.…”

Section: Introductionmentioning

confidence: 99%

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Dust generation in powders: Effect of particle size distribution

et al. 2017

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This study explores the relationship between the bulk and grain-scale properties of powders and dust generation. A vortex shaker dustiness tester was used to evaluate 8 calcium carbonate test powders with median particle sizes ranging from 2µm to 136µm. Respirable aerosols released from the powder samples were characterised by their particle number and mass concentrations. All the powder samples were found to release respirable fractions of dust particles which end up decreasing with time. The variation of powder dustiness as a function of the particle size distribution was analysed for the powders, which were classified into three groups based on the fraction of particles within the respirable range. The trends we observe might be due to the interplay of several mechanisms like de-agglomeration and attrition and their relative importance.

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“…The theoretical relationship between the properties of a powder and its dustiness remains poorly understood so that further experimental works are required [3,11] .…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dust generation in powders: Effect of particle size distribution

et al. 2017

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“…The dustiness level and characteristics of dust release from a powder material depends on their characteristics and properties (e.g., density, particle size distribution, moisture content, and extent of aggregation and agglomeration [ 35 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 ]). Additionally, storage conditions can play a role in the dustiness.…”

Section: Discussionmentioning

confidence: 99%

Occupational Exposure and Environmental Release: The Case Study of Pouring TiO2 and Filler Materials for Paint Production

Fonseca

Viitanen

Kanerva

et al. 2021

IJERPH

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Pulmonary exposure to micro- and nanoscaled particles has been widely linked to adverse health effects and high concentrations of respirable particles are expected to occur within and around many industrial settings. In this study, a field-measurement campaign was performed at an industrial manufacturer, during the production of paints. Spatial and personal measurements were conducted and results were used to estimate the mass flows in the facility and the airborne particle release to the outdoor environment. Airborne particle number concentration (1 × 103–1.0 × 104 cm−3), respirable mass (0.06–0.6 mg m−3), and PM10 (0.3–6.5 mg m−3) were measured during pouring activities. In overall; emissions from pouring activities were found to be dominated by coarser particles >300 nm. Even though the raw materials were not identified as nanomaterials by the manufacturers, handling of TiO2 and clays resulted in release of nanometric particles to both workplace air and outdoor environment, which was confirmed by TEM analysis of indoor and stack emission samples. During the measurement period, none of the existing exposure limits in force were exceeded. Particle release to the outdoor environment varied from 6 to 20 g ton−1 at concentrations between 0.6 and 9.7 mg m−3 of total suspended dust depending on the powder. The estimated release of TiO2 to outdoors was 0.9 kg per year. Particle release to the environment is not expected to cause any major impact due to atmospheric dilution

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“…The vortex shaker (VS) method (Chakravarty et al, 2017a(Chakravarty et al, , 2017bLe Bihan et al, 2014;Morgeneyer et al, 2013) is a promising dust generation method which is capable of functioning with very small sample quantities (less than 4g). (Morgeneyer et al, 2013) and (Le Bihan et al, 2014) used the VS method to test dust generation of micron-sized alumina particles and nanoscale carbon nano-tubes (CNTs) for one hour with sample mass as small as 0.5 g, respectively. (Morgeneyer et al, 2013) studied the minimum level of bulk mass and optimum vortex speeds necessary to aerosolize micron-sized alumina particles.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Long-term dust generation from silicon carbide powders

Chakravarty

Fischer

García‐Triñanes

et al. 2018

Process Safety and Environmental Protection

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Most dustiness studies do not measure dust release over long durations, nor do they characterize the effect of dust release on bulk powders. In this study, we tested the dustiness of two different samples of silicon carbide (SiC) powders (referred to as F220 and F320) over six hours using a vortex shaker. Additionally, we characterized the bulk sample for change in shape and size distribution due to the testing. Both powders release respirable fractions of dust particles but differ in their dust generation behavior. The numbers of released respirable particles for powder F220 are more than two times higher than those of powder F320. The dust generation mechanism might include the release of aerosols due to the attrition of particles owing to inter-particle and particle-wall impaction. This study emphasizes the need for long duration dustiness tests for hard materials like SiC and characterization for change in bulk material properties due to dust generation and release. Furthermore, the results can aid in selecting the bulk material for long-term applications based on dustiness.

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Experimental Study of the Aerosolization from a Carbon Nanotube Bulk by a Vortex Shaker

Cited by 15 publications

References 17 publications

Dust generation in powders: Effect of particle size distribution

Dust generation in powders: Effect of particle size distribution

Occupational Exposure and Environmental Release: The Case Study of Pouring TiO2 and Filler Materials for Paint Production

Long-term dust generation from silicon carbide powders

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