Surface/bulk partitioning and acid/base speciation of aqueous decanoate: direct observations and atmospheric implications
(2012) In Atmospheric Chemistry and Physics 12(24). p.12227-12242- Abstract
- Dilute aqueous solutions of the atmospheric organic surfactant sodium decanoate have been studied using surface sensitive X-ray photoelectron spectroscopy combined with synchrotron radiation. We studied the decanoate/decanoic acid speciation and preferential adsorption at the vapor-liquid interface, and the responses to mixing in solution with some of the most common atmospheric inorganic ions, Na+, NH4+, Cl-, and SO42-. We observe little or no influence of Na+, Cl-, or SO42- ions, on neither the relative speciation nor the individual adsorption properties of decanoate and decanoic acid. In particular, no significant salting-out effect due to common Na+ cations of the organic and inorganic salts was observed for these solutions. On the... (More)
- Dilute aqueous solutions of the atmospheric organic surfactant sodium decanoate have been studied using surface sensitive X-ray photoelectron spectroscopy combined with synchrotron radiation. We studied the decanoate/decanoic acid speciation and preferential adsorption at the vapor-liquid interface, and the responses to mixing in solution with some of the most common atmospheric inorganic ions, Na+, NH4+, Cl-, and SO42-. We observe little or no influence of Na+, Cl-, or SO42- ions, on neither the relative speciation nor the individual adsorption properties of decanoate and decanoic acid. In particular, no significant salting-out effect due to common Na+ cations of the organic and inorganic salts was observed for these solutions. On the other hand, mixing with NH4+ cations resulted in a pronounced surface enhancement of decanoic acid, which is attributed to surface specific acid-base chemistry. These changes in surface/bulk partitioning and surface speciation may significantly affect properties of aqueous droplets containing decanoate/decanoic acid, and potential implications for several processes critical to the climate effects of atmospheric aerosols are discussed. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3512407
- author
- Prisle, N. L. ; Ottosson, N. ; Öhrwall, Gunnar LU ; Soderstrom, J. ; Dal Maso, M. and Bjorneholm, O.
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Atmospheric Chemistry and Physics
- volume
- 12
- issue
- 24
- pages
- 12227 - 12242
- publisher
- Copernicus GmbH
- external identifiers
-
- wos:000312666100030
- scopus:84871754539
- ISSN
- 1680-7324
- DOI
- 10.5194/acp-12-12227-2012
- language
- English
- LU publication?
- yes
- id
- 54f0e9d7-3007-46af-a313-1971f4645ddb (old id 3512407)
- date added to LUP
- 2016-04-01 10:32:46
- date last changed
- 2022-03-27 17:22:47
@article{54f0e9d7-3007-46af-a313-1971f4645ddb, abstract = {{Dilute aqueous solutions of the atmospheric organic surfactant sodium decanoate have been studied using surface sensitive X-ray photoelectron spectroscopy combined with synchrotron radiation. We studied the decanoate/decanoic acid speciation and preferential adsorption at the vapor-liquid interface, and the responses to mixing in solution with some of the most common atmospheric inorganic ions, Na+, NH4+, Cl-, and SO42-. We observe little or no influence of Na+, Cl-, or SO42- ions, on neither the relative speciation nor the individual adsorption properties of decanoate and decanoic acid. In particular, no significant salting-out effect due to common Na+ cations of the organic and inorganic salts was observed for these solutions. On the other hand, mixing with NH4+ cations resulted in a pronounced surface enhancement of decanoic acid, which is attributed to surface specific acid-base chemistry. These changes in surface/bulk partitioning and surface speciation may significantly affect properties of aqueous droplets containing decanoate/decanoic acid, and potential implications for several processes critical to the climate effects of atmospheric aerosols are discussed.}}, author = {{Prisle, N. L. and Ottosson, N. and Öhrwall, Gunnar and Soderstrom, J. and Dal Maso, M. and Bjorneholm, O.}}, issn = {{1680-7324}}, language = {{eng}}, number = {{24}}, pages = {{12227--12242}}, publisher = {{Copernicus GmbH}}, series = {{Atmospheric Chemistry and Physics}}, title = {{Surface/bulk partitioning and acid/base speciation of aqueous decanoate: direct observations and atmospheric implications}}, url = {{http://dx.doi.org/10.5194/acp-12-12227-2012}}, doi = {{10.5194/acp-12-12227-2012}}, volume = {{12}}, year = {{2012}}, }