Articles | Volume 22, issue 9
https://doi.org/10.5194/acp-22-6045-2022
https://doi.org/10.5194/acp-22-6045-2022
Research article
 | 
09 May 2022
Research article |  | 09 May 2022

Iron from coal combustion particles dissolves much faster than mineral dust under simulated atmospheric acidic conditions

Clarissa Baldo, Akinori Ito, Michael D. Krom, Weijun Li, Tim Jones, Nick Drake, Konstantin Ignatyev, Nicholas Davidson, and Zongbo Shi

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Cited articles

Baker, A. R., Li, M., and Chance, R.: Trace Metal Fractional Solubility in Size-Segregated Aerosols From the Tropical Eastern Atlantic Ocean, Global Biogeochem., 34, e2019GB006510, https://doi.org/10.1029/2019GB006510, 2020. 
Baker, A. R., Kanakidou, M., Nenes, A., Myriokefalitakis, S., Croot, P. L., Duce, R. A., Gao, Y., Guieu, C., Ito, A., Jickells, T. D., Mahowald, N. M., Middag, R., Perron, M. M. G., Sarin, M. M., Shelley, R., and Turner, D. R.: Changing atmospheric acidity as a modulator of nutrient deposition and ocean biogeochemistry, Sci. Adv., 7, eabd8800, https://doi.org/10.1126/sciadv.abd8800, 2021. 
Baldo, C.: Research data supporting “Iron from coal combustion particles dissolves much faster than mineral dust under simulated atmospheric acidic conditions”, University of Birmingham [data set], https://doi.org/10.25500/edata.bham.00000702, 2022. 
Baldo, C., Formenti, P., Nowak, S., Chevaillier, S., Cazaunau, M., Pangui, E., Di Biagio, C., Doussin, J.-F., Ignatyev, K., Dagsson-Waldhauserova, P., Arnalds, O., MacKenzie, A. R., and Shi, Z.: Distinct chemical and mineralogical composition of Icelandic dust compared to northern African and Asian dust, Atmos. Chem. Phys., 20, 13521–13539, https://doi.org/10.5194/acp-20-13521-2020, 2020. 
Bibi, I., Singh, B., and Silvester, E.: Dissolution kinetics of soil clays in sulfuric acid solutions: Ionic strength and temperature effects, Appl. Geochem., 51, 170–183, https://doi.org/10.1016/j.apgeochem.2014.10.004, 2014. 
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Short summary
High ionic strength relevant to the aerosol-water enhanced proton-promoted dissolution of iron in coal fly ash (up to 7 times) but suppressed oxalate-promoted dissolution at low pH (< 3). Fe in coal fly ash dissolved up to 7 times faster than in Saharan dust at low pH. A global model with the updated dissolution rates of iron in coal fly ash suggested a larger contribution of pyrogenic dissolved Fe over regions with a strong impact from fossil fuel combustions.
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