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The Photochemical Conversion of Surrogate Emissions for Use in Toxicological Studies: Role of Particulate- and Gas-Phase Products

Metadata Updated: November 12, 2020

The production of photochemical atmospheres under controlled conditions in an irradiation chamber permits the manipulation of parameters that influence the resulting air pollutant chemistry and potential biological effects. To date no studies have examined how contrasting atmospheres with a similar Air Quality Health Index (AQHI), but with differing ratios of criteria air pollutants, might differentially affect health endpoints. Here we produced two atmospheres with similar AQHIs based on the final concentrations of ozone, nitrogen dioxide, and particulate matter (PM2.5). One simulated atmosphere (SA-PM) generated from irradiation of ~23 ppmC gasoline, ~5 ppmC of α-pinene, 529 ppb NO, and 3 µg m-3 (NH4)2SO4 as a seed resulted in ~976 µg m-3 PM2.5, 326 ppb NO2, and 141 ppb O3 (AQHI 97.7). The other atmosphere (SA-O3) generated from ~8 ppmC gasoline, 5 ppmC isoprene, 874 ppb NO, 2 µg m-3 (NH4)2SO4 resulted in ~55 µg m-3 PM2.5, 643 ppb NO2, and 430 ppb O3 (AQHI of 99.8). Chemical speciation by gas chromatography showed that photo-oxidation degraded the organic precursors and promoted the de novo formation of secondary reaction products such as formaldehyde and acrolein. Further work in accompanying papers describe toxicological outcomes from the two distinct photochemical atmospheres.

This dataset is associated with the following publication: Krug, J., M. Lewandowski, J. Offenberg, J. Turlington, W. Lonneman, N. Modak, T. Krantz, C. King, S. Gavett, I. Gilmour, D. DeMarini, and T. Kleindienst. Photochemical Conversion of Surrogate Emissions for Use in Toxicological Studies: Role of Particulate- and Gas-Phase Products. International Journal of Environmental Science and Technology. Springer, Heidelburg, GERMANY, 52(5): 3037-3044, (2018).

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Public: This dataset is intended for public access and use. License: See this page for license information.

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References

https://doi.org/10.1021/acs.est.7b04879

Dates

Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from EPA ScienceHub

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher U.S. EPA Office of Research and Development (ORD)
Maintainer
Identifier https://doi.org/10.23719/1407610
Data Last Modified 2017-08-24
Public Access Level public
Bureau Code 020:00
Schema Version https://project-open-data.cio.gov/v1.1/schema
Harvest Object Id d1f729da-3c48-4449-bca3-b38d48165b0b
Harvest Source Id 04b59eaf-ae53-4066-93db-80f2ed0df446
Harvest Source Title EPA ScienceHub
License https://pasteur.epa.gov/license/sciencehub-license.html
Program Code 020:094
Publisher Hierarchy U.S. Government > U.S. Environmental Protection Agency > U.S. EPA Office of Research and Development (ORD)
Related Documents https://doi.org/10.1021/acs.est.7b04879
Source Datajson Identifier True
Source Hash 7382ecf740459e7e1c4c2a58e283ef5c0f4b423d
Source Schema Version 1.1

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