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Characterizing Aggregated Exposure to Primary Particulate Matter: Recommended Intake Fractions for Indoor and Outdoor Sources

Fantke, Peter and Jolliet, Olivier and Apte, Joshua S. and Hodas, Natasha and Evans, John and Weschler, Charles J. and Stylianou, Katerina S. and Jantunen, Matti and McKone, Thomas E. (2017) Characterizing Aggregated Exposure to Primary Particulate Matter: Recommended Intake Fractions for Indoor and Outdoor Sources. Environmental Science and Technology, 51 (16). pp. 9089-9100. ISSN 0013-936X. doi:10.1021/acs.est.7b02589.

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Exposure to fine particulate matter (PM_(2.5)) from indoor and outdoor sources is a leading environmental contributor to global disease burden. In response, we established under the auspices of the UNEP/SETAC Life Cycle Initiative a coupled indoor-outdoor emission-to-exposure framework to provide a set of consistent primary PM_(2.5) aggregated exposure factors. We followed a matrix-based mass balance approach for quantifying exposure from indoor and ground-level urban and rural outdoor sources using an effective indoor-outdoor population intake fraction and a system of archetypes to represent different levels of spatial detail. Emission-to-exposure archetypes range from global indoor and outdoor averages, via archetypal urban and indoor settings, to 3646 real-world cities in 16 parametrized subcontinental regions. Population intake fractions from urban and rural outdoor sources are lowest in Northern regions and Oceania and highest in Southeast Asia with population-weighted means across 3646 cities and 16 subcontinental regions of, respectively, 39 ppm (95% confidence interval: 4.3–160 ppm) and 2 ppm (95% confidence interval: 0.2–6.3 ppm). Intake fractions from residential and occupational indoor sources range from 470 ppm to 62 000 ppm, mainly as a function of air exchange rate and occupancy. Indoor exposure typically contributes 80–90% to overall exposure from outdoor sources. Our framework facilitates improvements in air pollution reduction strategies and life cycle impact assessments.

Item Type:Article
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URLURL TypeDescription Information
Fantke, Peter0000-0001-7148-6982
Apte, Joshua S.0000-0002-2796-3478
Additional Information:© 2017 American Chemical Society. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes. Received: May 19, 2017; Revised: July 6, 2017; Accepted: July 6, 2017; Published: July 6, 2017. We thank Jeffrey Siegel, Deborah Bennett, Jouni Tuomisto, Marko Tainio, and Michael Brauer for their manuscript comments and data inputs. This work was financially supported by the UNEP/SETAC Life Cycle Initiative and by the Marie Curie project Quan-Tox (grant agreement no. 631910) funded by the European Commission under the Seventh 556 Framework Programme. The authors declare no competing financial interest.
Funding AgencyGrant Number
Marie Curie Fellowship631910
European CommissionUNSPECIFIED
Issue or Number:16
Record Number:CaltechAUTHORS:20170707-124341897
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Official Citation:Characterizing Aggregated Exposure to Primary Particulate Matter: Recommended Intake Fractions for Indoor and Outdoor Sources Peter Fantke, Olivier Jolliet, Joshua S. Apte, Natasha Hodas, John Evans, Charles J. Weschler, Katerina S. Stylianou, Matti Jantunen, and Thomas E. McKone Environmental Science & Technology 2017 51 (16), 9089-9100 DOI: 10.1021/acs.est.7b02589
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78857
Deposited By: Tony Diaz
Deposited On:07 Jul 2017 20:07
Last Modified:15 Nov 2021 17:43

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