Number of the records: 1

Hygroscopic behavior of inorganic–organic aerosol systems including ammonium sulfate, dicarboxylic acids, and oligome.r

SYSNO ASEP	0523796
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Hygroscopic behavior of inorganic–organic aerosol systems including ammonium sulfate, dicarboxylic acids, and oligome.r
Author(s)	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, SAI}
Article number	117481
Source Title	Atmospheric Environment. - : Elsevier - ISSN 1352-2310 Roč. 229, 15 May (2020)
Number of pages	17 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	aerosol particles ; aerosol hygroscopic growth ; water uptake
Subject RIV	DG - Athmosphere Sciences, Meteorology
OECD category	Meteorology and atmospheric sciences
R&D Projects	LM2015037 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	GA17-19798S GA ČR - Czech Science Foundation (CSF)
	EF16_013/0001315 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Method of publishing	Open access
Institutional support	UCHP-M - RVO:67985858
UT WOS	000530031600020
EID SCOPUS	85083048409
DOI	10.1016/j.atmosenv.2020.117481
Annotation	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.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2021
Electronic address	https://www.sciencedirect.com/journal/atmospheric-environment/vol/229/suppl/C

Number of the records: 1