Powder Intrinsic Properties as Dustiness Predictor for an Efficient Exposure Assessment?
aerosol
dustiness
exposure
powder
prediction
Journal
Annals of work exposures and health
ISSN: 2398-7316
Titre abrégé: Ann Work Expo Health
Pays: England
ID NLM: 101698454
Informations de publication
Date de publication:
13 11 2019
13 11 2019
Historique:
received:
31
07
2018
revised:
04
07
2019
accepted:
25
07
2019
pubmed:
7
10
2019
medline:
1
7
2020
entrez:
7
10
2019
Statut:
ppublish
Résumé
Dustiness is not an intrinsic physically defined property of a powder, but the tendency of particles to become airborne in response to mechanical and/or aerodynamic stimuli. The present study considers a set of 10 physical properties to which the powder dustiness can be attributed. Through a preliminary investigation of a standardized continuous drop test scenario, we present first set of results on the varying degrees or weights of influence of these properties on the aerosolization tendency of powder particles. The inter-particle distance is found to be the most dominant property controlling the particle aerosolization, followed by the ability of powder particles to get electrostatically charged. We observe the kinetics involved during powder aerosolization to be governed by two ratios: drag force/cohesive force and drag force/gravitational force. The converging tendencies in these initial results indicate that these physical properties can be used to model dustiness of falling powder, which can eventually be used in risk assessment tools for an efficient exposure estimation of the powders.
Identifiants
pubmed: 31587034
pii: 5581944
doi: 10.1093/annweh/wxz065
pmc: PMC6853698
doi:
Substances chimiques
Aerosols
0
Air Pollutants, Occupational
0
Dust
0
Powders
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1029-1045Informations de copyright
© The Author(s) 2019. Published by Oxford University Press on behalf of the British Occupational Hygiene Society.
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