The DOI matches its Crossref record; 106 of the 106 references it cites were found in a registry or an index.
Highly Acidic Ambient Particles, Soluble Metals, and Oxidative Potential: A Link between Sulfate and Aerosol Toxicity
Open accessAbstract
Soluble transition metals in particulate matter (PM) can generate reactive oxygen species in vivo by redox cycling, leading to oxidative stress and adverse health effects. Most metals, such as those from roadway traffic, are emitted in an insoluble form, but must be soluble for redox cycling. Here we present the mechanism of metals dissolution by highly acidic sulfate aerosol and the effect on particle oxidative potential (OP) through analysis of size distributions. Size-segregated ambient PM were collected from a road-side and representative urban site in Atlanta, GA. Elemental and organic carbon, ions, total and water-soluble metals, and water-soluble OP were measured. Particle pH was determined with a thermodynamic model using measured ionic species. Sulfate was spatially uniform and found mainly in the fine mode, whereas total metals and mineral dust cations were highest at the road-side site and in the coarse mode, resulting in a fine mode pH < 2 and near neutral coarse mode. Soluble metals and OP peaked at the intersection of these modes demonstrating that sulfate plays a key role in producing highly acidic fine aerosols capable of dissolving primary transition metals that contribute to aerosol OP. Sulfate-driven metals dissolution may account for sulfate-health associations reported in past studies.
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Cites
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The acidity of atmospheric particles and clouds
Pye, H. O. T., Nenes, A., Alexander, B., Ault, A. P., Barth, M. C., Clegg, S. L., Collett Jr., J. L., Fahey, K. M., Hennigan, C. J., Herrmann, H., et al. (2020) · Atmospheric Chemistry and Physics · doi:10.5194/acp-20-4809-2020 · Cited by 785
Self-citationGuo, H., Weber, R. J., & Nenes, A. (2017) · Scientific Reports · doi:10.1038/s41598-017-11704-0 · Cited by 268
Self-citationGuo, H., Liu, J., Froyd, K. D., Roberts, J. M., Veres, P. R., Hayes, P. L., Jimenez, J. L., Nenes, A., & Weber, R. J. (2017) · Atmospheric Chemistry and Physics · doi:10.5194/acp-17-5703-2017 · Cited by 267
Self-citationAerosol pH and its driving factors in Beijing
Ding, J., Zhao, P., Su, J., Dong, Q., Du, X., & Zhang, Y. (2019) · Atmospheric Chemistry and Physics · doi:10.5194/acp-19-7939-2019 · Cited by 256
Shi, L., Zhu, Q., Wang, Y., Hao, H., Zhang, H., Schwartz, J., Amini, H., van Donkelaar, A., Martin, R. V., Steenland, K., et al. (2023) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.2211282119 · Cited by 145
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Metadata
- Authors
- Fang, T., Guo, H., Zeng, L., Verma, V., Nenes, A., & Weber, R. J.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-02-13
- Volume
- 51
- Issue
- 5
- Pages
- 2611-2620
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2583909753
- Cited by
- 584
- References
- 106
- FWCI
- 23.17
- Type
- journal article
- Language
- en
- Open access
- green
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