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Modeling regional deposited dose of submicron aerosol particles

Hussein, Tareq; Löndahl, Jakob LU ; Paasonen, Pauli; Koivisto, Antti Joonas; Petaja, Tuukka; Hameri, Kaarle and Kulmala, Markku (2013) In Science of the Total Environment 458. p.140-149
Abstract
We developed a simple model to calculate the regional deposited dose of submicron aerosol particles in the respiratory system. This model incorporates measured outdoor and modeled indoor particle number size distributions, detailed activity patterns of three age groups (teens, adults, and the elderly), semi-empirical estimation of the regional deposition fraction, hygroscopic properties of urban aerosols, and reported breathing minute volumes. We calculated the total and regional deposited dose based on three concentration metrics: particle number (PN), mass (PM), and surface area (PSA). The 24-h total deposited dose of fine particles in adult males was around 40 mu g (57 x 109 particles, 8 x 102 mm(2)) and 41 mu g (40 x 109 particles, 8 x... (More)
We developed a simple model to calculate the regional deposited dose of submicron aerosol particles in the respiratory system. This model incorporates measured outdoor and modeled indoor particle number size distributions, detailed activity patterns of three age groups (teens, adults, and the elderly), semi-empirical estimation of the regional deposition fraction, hygroscopic properties of urban aerosols, and reported breathing minute volumes. We calculated the total and regional deposited dose based on three concentration metrics: particle number (PN), mass (PM), and surface area (PSA). The 24-h total deposited dose of fine particles in adult males was around 40 mu g (57 x 109 particles, 8 x 102 mm(2)) and 41 mu g (40 x 109 particles, 8 x 102 mm(2)) on workdays and weekends, respectively. The total and regional 24-h deposited dose based on any of the metrics was at most 1.5 times higher in males than in females. The deposited dose values in the other age groups were slightly different than in adults. Regardless of the particle size fraction or the deposited dose metric, the pulmonary/alveolar region received the largest fraction of the deposited dose. These values represent the lowest estimate of the deposited dose and they are expected to be higher in real-life conditions after considering indoor sources of aerosol particles and spatial variability of outdoor aerosols. This model can be extended to youngsters (<12 years old) after gaining accurate information about the deposition fraction inside their respiratory system and their breathing pattern. This investigation is foreseen to bridge the gap between exposure and response in epidemiological studies. (C) 2013 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Activity pattern, Hygroscopicity, Particle number size distribution, Particle number, Particle mass, Particle surface area
in
Science of the Total Environment
volume
458
pages
140 - 149
publisher
Elsevier
external identifiers
  • wos:000320901700017
  • scopus:84877353761
ISSN
1879-1026
DOI
10.1016/j.scitotenv.2013.04.022
project
MERGE
language
English
LU publication?
yes
id
68e8ea8b-ef04-4e41-ba91-9c80129f0986 (old id 3975699)
date added to LUP
2013-08-22 14:29:58
date last changed
2019-08-14 01:06:11
@article{68e8ea8b-ef04-4e41-ba91-9c80129f0986,
  abstract     = {We developed a simple model to calculate the regional deposited dose of submicron aerosol particles in the respiratory system. This model incorporates measured outdoor and modeled indoor particle number size distributions, detailed activity patterns of three age groups (teens, adults, and the elderly), semi-empirical estimation of the regional deposition fraction, hygroscopic properties of urban aerosols, and reported breathing minute volumes. We calculated the total and regional deposited dose based on three concentration metrics: particle number (PN), mass (PM), and surface area (PSA). The 24-h total deposited dose of fine particles in adult males was around 40 mu g (57 x 109 particles, 8 x 102 mm(2)) and 41 mu g (40 x 109 particles, 8 x 102 mm(2)) on workdays and weekends, respectively. The total and regional 24-h deposited dose based on any of the metrics was at most 1.5 times higher in males than in females. The deposited dose values in the other age groups were slightly different than in adults. Regardless of the particle size fraction or the deposited dose metric, the pulmonary/alveolar region received the largest fraction of the deposited dose. These values represent the lowest estimate of the deposited dose and they are expected to be higher in real-life conditions after considering indoor sources of aerosol particles and spatial variability of outdoor aerosols. This model can be extended to youngsters (&lt;12 years old) after gaining accurate information about the deposition fraction inside their respiratory system and their breathing pattern. This investigation is foreseen to bridge the gap between exposure and response in epidemiological studies. (C) 2013 Elsevier B.V. All rights reserved.},
  author       = {Hussein, Tareq and Löndahl, Jakob and Paasonen, Pauli and Koivisto, Antti Joonas and Petaja, Tuukka and Hameri, Kaarle and Kulmala, Markku},
  issn         = {1879-1026},
  keyword      = {Activity pattern,Hygroscopicity,Particle number size distribution,Particle number,Particle mass,Particle surface area},
  language     = {eng},
  pages        = {140--149},
  publisher    = {Elsevier},
  series       = {Science of the Total Environment},
  title        = {Modeling regional deposited dose of submicron aerosol particles},
  url          = {http://dx.doi.org/10.1016/j.scitotenv.2013.04.022},
  volume       = {458},
  year         = {2013},
}