Articles | Volume 20, issue 3
https://doi.org/10.5194/acp-20-1849-2020
https://doi.org/10.5194/acp-20-1849-2020
Research article
 | 
17 Feb 2020
Research article |  | 17 Feb 2020

Water-soluble iron emitted from vehicle exhaust is linked to primary speciated organic compounds

Joseph R. Salazar, Benton T. Cartledge, John P. Haynes, Rachel York-Marini, Allen L. Robinson, Greg T. Drozd, Allen H. Goldstein, Sirine C. Fakra, and Brian J. Majestic

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Latest update: 30 May 2023
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Short summary
The solubility of atmospheric iron is important in human health and environmental chemistry. To understand the origin of water-soluble iron in urban areas, tailpipe emissions were collected from 32 low-emitting vehicles, from which iron solubility averaged 30 % (0–82 %), more than 10 times the average in the Earth's crust. Water-soluble iron was independent of almost all exhaust components and of the iron phase in the particles but was correlated with specific exhaust-derived organic compounds.
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