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Influence of Organic Acids on the Surface Composition of Sea Spray Aerosol
Stockholm University, Faculty of Science, Department of Environmental Science and Analytical Chemistry. Uppsala University, Sweden.
Stockholm University, Faculty of Science, Department of Environmental Science and Analytical Chemistry.
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Number of Authors: 62020 (English)In: Journal of Physical Chemistry A, ISSN 1089-5639, E-ISSN 1520-5215, Vol. 124, no 2, p. 422-429Article in journal (Refereed) Published
Abstract [en]

Recent studies on sea spray aerosol indicate an enrichment of Ca2+ in small particles, which are often thought to originate from the very surface of a water body when bubbles burst. One model to explain this observation is the formation of ion pairs between Ca2+(aq) and surface-active organic species. In this study, we have used X-ray photoelectron spectroscopy to probe aqueous salt solutions and artificial sea spray aerosol to study whether ion pairing in the liquid environment also affects the surface composition of dry aerosol. Carboxylic acids were added to the sample solutions to mimic some of the organic compounds present in natural seawater. Our results show that the formation of a core-shell structure governs the surface composition of the aerosol. The core-shell structure contrasts previous observations of the dry sea spray aerosol on substrates. As such, this may indicate that substrates can impact the morphology of the dried aerosol.

Place, publisher, year, edition, pages
2020. Vol. 124, no 2, p. 422-429
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Chemical Sciences Physical Sciences
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URN: urn:nbn:se:su:diva-179628DOI: 10.1021/acs.jpca.9b09710ISI: 000508468500018PubMedID: 31833771OAI: oai:DiVA.org:su-179628DiVA, id: diva2:1414758
Available from: 2020-03-16 Created: 2020-03-16 Last updated: 2020-03-16Bibliographically approved

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Unger, IsaakSalter, MatthewZieger, PaulPatanen, Minna
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