Hygroscopic behavior of inorganic–organic aerosol systems including ammonium sulfate, dicarboxylic acids, and oligome.r
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F20%3A00523796" target="_blank" >RIV/67985858:_____/20:00523796 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/journal/atmospheric-environment/vol/229/suppl/C" target="_blank" >https://www.sciencedirect.com/journal/atmospheric-environment/vol/229/suppl/C</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.atmosenv.2020.117481" target="_blank" >10.1016/j.atmosenv.2020.117481</a>
Alternative languages
Result language
angličtina
Original language name
Hygroscopic behavior of inorganic–organic aerosol systems including ammonium sulfate, dicarboxylic acids, and oligome.r
Original language description
We provide indirect evidence for the presence of an organic solid alongside solid AS. Hypothetically, the observed disagreement could also be due to a preferential interaction between –COOH and –CH2OCH2- groups, which may prevent a fraction of the organic acid amount to interact with water. For fully deliquesced particles, good agreement between model predictions and measurements are found for the mixed PEG–organic acids–AS systems. Upon dehydration, when the mass fraction of PEG <20%, the signature of effloresced AS in solid–liquid equilibrium with the remaining solution was observed. However, with higher organic volume fraction, the particles release water gradually without a noticeable efflorescence of AS down to 20% RH. For quinary PEG–organic acids–AS systems, the AIOMFAC-based equilibrium model predicts that liquid–liquid phase separation (LLPS) occurs with a clear distinction between a predominantly electrolyte-rich phase alfa (composed mainly of ammonium and sulfate ions, organic acids and water) and an organic-rich phase beta (composed mainly of PEG). The onset of LLPS is predicted at RH levels of 83–89% depending on the mixed particle’s composition. We also show that a residence time of ~10 s in the humidified section of the HTDMA instrument is sufficient for establishing gas–particle equilibrium of the 100 nm sized organic–inorganic particles studied in this work, this may differ in other cases when highly viscous particles are involved. The measurements offer valuable data for future work on the development and validation of organic solid–liquid equilibrium in thermodynamic models.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10509 - Meteorology and atmospheric sciences
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Atmospheric Environment
ISSN
1352-2310
e-ISSN
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Volume of the periodical
229
Issue of the periodical within the volume
15 May
Country of publishing house
GB - UNITED KINGDOM
Number of pages
17
Pages from-to
117481
UT code for WoS article
000530031600020
EID of the result in the Scopus database
2-s2.0-85083048409