Shiraiwa, Manabu and Zuend, Andreas and Bertram, Allan K. and Seinfeld, John H. (2013) Gas-particle partitioning of atmospheric aerosols: interplay of physical state, non-ideal mixing and morphology. Physical Chemistry Chemical Physics, 15 (27). pp. 11441-11453. ISSN 1463-9076. doi:10.1039/c3cp51595h. https://resolver.caltech.edu/CaltechAUTHORS:20130613-081545477
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Abstract
Atmospheric aerosols, comprising organic compounds and inorganic salts, play a key role in air quality and climate. Mounting evidence exists that these particles frequently exhibit phase separation into predominantly organic and aqueous electrolyte-rich phases. As well, the presence of amorphous semi-solid or glassy particle phases has been established. Using the canonical system of ammonium sulfate mixed with organics from the ozone oxidation of α-pinene, we illustrate theoretically the interplay of physical state, non-ideality, and particle morphology affecting aerosol mass concentration and the characteristic timescale of gas–particle mass transfer. Phase separation can significantly affect overall particle mass and chemical composition. Semi-solid or glassy phases can kinetically inhibit the partitioning of semivolatile components and hygroscopic growth, in contrast to the traditional assumption that organic compounds exist in quasi-instantaneous gas–particle equilibrium. These effects have significant implications for the interpretation of laboratory data and the development of improved atmospheric air quality and climate models.
Item Type: | Article | |||||||||
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Additional Information: | © 2013 the Owner Societies. Received 14 Apr 2013, Accepted 29 May 2013. First published online 29 May 2013. This work was funded by US National Science Foundation grant AGS-1057183. MS was supported by the Japan Society for the Promotion of Science (JSPS) Postdoctoral Fellowship for Research Abroad. | |||||||||
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Issue or Number: | 27 | |||||||||
DOI: | 10.1039/c3cp51595h | |||||||||
Record Number: | CaltechAUTHORS:20130613-081545477 | |||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20130613-081545477 | |||||||||
Official Citation: | Shiraiwa, M., A. Zuend, et al. (2013). "Gas-particle partitioning of atmospheric aerosols: interplay of physical state, non-ideal mixing and morphology." Physical Chemistry Chemical Physics 15(27): 11441-11453. | |||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
ID Code: | 38934 | |||||||||
Collection: | CaltechAUTHORS | |||||||||
Deposited By: | Tony Diaz | |||||||||
Deposited On: | 25 Jun 2013 23:59 | |||||||||
Last Modified: | 09 Nov 2021 23:41 |
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