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Hygroscopic behavior of inorganic–organic aerosol systems including ammonium sulfate, dicarboxylic acids, and oligome.r
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SYSNO ASEP 0523796 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Hygroscopic behavior of inorganic–organic aerosol systems including ammonium sulfate, dicarboxylic acids, and oligome.r Tvůrce(i) Bouzidi, Hichem (UCHP-M) ORCID, RID, SAI
Zuend, A. (CA)
Ondráček, Jakub (UCHP-M) RID, ORCID, SAI
Schwarz, Jaroslav (UCHP-M) RID, ORCID, SAI
Ždímal, Vladimír (UCHP-M) RID, ORCID, SAIČíslo článku 117481 Zdroj.dok. Atmospheric Environment. - : Elsevier - ISSN 1352-2310
Roč. 229, 15 May (2020)Poč.str. 17 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova aerosol particles ; aerosol hygroscopic growth ; water uptake Vědní obor RIV DG - Vědy o atmosféře, meteorologie Obor OECD Meteorology and atmospheric sciences CEP LM2015037 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA17-19798S GA ČR - Grantová agentura ČR EF16_013/0001315 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UCHP-M - RVO:67985858 UT WOS 000530031600020 EID SCOPUS 85083048409 DOI 10.1016/j.atmosenv.2020.117481 Anotace 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. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2021 Elektronická adresa https://www.sciencedirect.com/journal/atmospheric-environment/vol/229/suppl/C
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