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dc.contributor.authorZawadowicz, Maria Anna
dc.contributor.authorProud, Simon R.
dc.contributor.authorSeppalainen, Sandra S.
dc.contributor.authorCziczo, Daniel James
dc.date.accessioned2015-11-02T18:17:35Z
dc.date.available2015-11-02T18:17:35Z
dc.date.issued2015-08
dc.date.submitted2015-06
dc.identifier.issn1680-7324
dc.identifier.issn1680-7316
dc.identifier.urihttp://hdl.handle.net/1721.1/99653
dc.description.abstractAtmospheric aerosol particles are often partially or completely composed of inorganic salts, such as ammonium sulfate and sodium chloride, and therefore exhibit hygroscopic properties. Many inorganic salts have well-defined deliquescence and efflorescence points at which they take up and lose water, respectively. Field measurements have shown that atmospheric aerosols are not typically pure inorganic salt, instead, they often also contain organic species. There is ample evidence from laboratory studies that suggests that mixed particles exist in a phase-separated state, with an aqueous inorganic core and organic shell. Although phase separation has not been measured in situ, there is no reason it would not also take place in the atmosphere. Here, we investigate the deliquescence and efflorescence points, phase separation and ability to exchange gas-phase components of mixed organic and inorganic aerosol using a flow tube coupled with FTIR (Fourier transform infrared) spectroscopy. Ammonium sulfate aerosol mixed with organic polyols with different O : C ratios, including 1,4-butanediol, glycerol, 1,2,6-hexanetriol, 1,2-hexanediol, and 1,5-pentanediol have been investigated. Those constituents correspond to materials found in the atmosphere in great abundance and, therefore, particles prepared in this study should mimic atmospheric mixed-phase aerosol particles. Some results of this study tend to be in agreement with previous microscopy experiments, but others, such as phase separation properties of 1,2,6-hexanetriol, do not agree with previous work. Because the particles studied in this experiment are of a smaller size than those used in microscopy studies, the discrepancies found could be a size-related effect.en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (Earth and Space Science Fellowship)en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (Grant NNX13AO15G)en_US
dc.description.sponsorshipUnited States. National Oceanic and Atmospheric Administration (Grant NA11OAR4310159)en_US
dc.language.isoen_US
dc.publisherCopernicus GmbHen_US
dc.relation.isversionofhttp://dx.doi.org/10.5194/acp-15-8975-2015en_US
dc.rightsCreative Commons Attributionen_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.sourceCopernicus Publicationsen_US
dc.titleHygroscopic and phase separation properties of ammonium sulfate/organics/water ternary solutionsen_US
dc.typeArticleen_US
dc.identifier.citationZawadowicz, M. A., S. R. Proud, S. S. Seppalainen, and D. J. Cziczo. “Hygroscopic and Phase Separation Properties of Ammonium Sulfate/organics/water Ternary Solutions.” Atmos. Chem. Phys. 15, no. 15 (2015): 8975–8986.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Civil and Environmental Engineeringen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciencesen_US
dc.contributor.mitauthorZawadowicz, Maria Annaen_US
dc.contributor.mitauthorProud, Simon R.en_US
dc.contributor.mitauthorSeppalainen, Sandra S.en_US
dc.contributor.mitauthorCziczo, Daniel Jamesen_US
dc.relation.journalAtmospheric Chemistry and Physicsen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsZawadowicz, M. A.; Proud, S. R.; Seppalainen, S. S.; Cziczo, D. J.en_US
dc.identifier.orcidhttps://orcid.org/0000-0003-1851-8740
dc.identifier.orcidhttps://orcid.org/0000-0003-4234-0954
mit.licensePUBLISHER_CCen_US
mit.metadata.statusComplete


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