School children’s personal exposure to ultrafine particles in the urban environment

Mazaheri, Mandana, Clifford, Sam, Jayaratne, Rohan, Mokhtar, Megat, Fuoco, Fernanda, Buonanno, Giorgio, & Morawska, Lidia (2014) School children’s personal exposure to ultrafine particles in the urban environment. Environmental Science & Technology (including News & Research Notes), 48(1), pp. 113-120.

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There has been considerable scientific interest in personal exposure to ultrafine particles (UFP).

In this study, the inhaled particle surface area doses and dose relative intensities in the tracheobronchial and alveolar regions of lungs were calculated using the measured 24-hour UFP time series of school children personal exposures for each recorded activity. Bayesian hierarchical modelling was used to determine mean doses and dose intensities for the various microenvironments.

Analysis of measured personal exposures for 137 participating children from 25 schools in the Brisbane Metropolitan Area showed similar trends for all the participating children. Bayesian regression modelling was performed to calculate the daily proportion of children's total doses at different microenvironments. The proportion of alveolar doses in the total daily dose for \emph{home}, \emph{school}, \emph{commuting} and \emph{other} were 55.3\%, 35.3\%, 4.5\% and 5.0\%, respectively, with the \emph{home} microenvironment contributing a majority of children's total daily dose.

Children's mean indoor dose was never higher than the outdoor's at any of the schools, indicating there were no persistent indoor particle sources in the classrooms during the measurements. Outdoor activities, eating/cooking at home and commuting were the three activities with the highest dose intensities. Personal exposure was more influenced by the ambient particle levels than immediate traffic.

Impact and interest:

25 citations in Scopus
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13 citations in Web of Science®

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ID Code: 65099
Item Type: Journal Article
Refereed: Yes
Keywords: personal exposure, school children, ultrafine particles, surface area dose, urban environment
DOI: 10.1021/es403721w
ISSN: 0013-936X
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Aerosols (040101)
Australian and New Zealand Standard Research Classification > ENVIRONMENTAL SCIENCES (050000) > ENVIRONMENTAL SCIENCE AND MANAGEMENT (050200) > Environmental Monitoring (050206)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ENVIRONMENTAL ENGINEERING (090700) > Environmental Engineering not elsewhere classified (090799)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 American Chemical Society
Deposited On: 04 Dec 2013 23:19
Last Modified: 26 Nov 2014 13:03

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