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Hygroscopicity of secondary marine organic aerosols: Mixtures of alkylammonium salts and inorganic components.
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SYSNO ASEP 0542862 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Hygroscopicity of secondary marine organic aerosols: Mixtures of alkylammonium salts and inorganic components. Author(s) Asadzadeh, Behnaz (UCHP-M) SAI
Bouzidi, Hichem (UCHP-M) ORCID, RID, SAI
Bisson, R. (FR)
Ondráček, Jakub (UCHP-M) RID, ORCID, SAI
Schwarz, Jaroslav (UCHP-M) RID, ORCID, SAI
Lahib, A. (FR)
Ždímal, Vladimír (UCHP-M) RID, ORCID, SAIArticle number 148131 Source Title Science of the Total Environment. - : Elsevier - ISSN 0048-9697
Roč. 790, OCT 10 (2021)Number of pages 40 s. Language eng - English Country NL - Netherlands Keywords marine aerosol ; hygroscopicity ; alkylammonium salts Subject RIV DG - Athmosphere Sciences, Meteorology OECD category Meteorology and atmospheric sciences R&D Projects LM2018122 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_013/0001315 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access with time embargo (11.10.2023) Institutional support UCHP-M - RVO:67985858 UT WOS 000685278900003 EID SCOPUS 85107273921 DOI 10.1016/j.scitotenv.2021.148131 Annotation Field studies have identified alkylammonium salts as important components of secondary marine organic aerosols. In this work, we study the hygroscopic behavior of laboratory-generated alkylammonium aerosol particles, including monomethylammonium chloride (MMACl), dimethylammonium chloride (DMACl), trimethylammonium chloride (TMACl), diethylammonium chloride (DEACl), and their mixtures with inorganic salts containing ammonium sulfate (NH4)2SO4, sodium chloride NaCl, calcium nitrate Ca(NO3)2 and sodium sulfate Na2SO4 at different dry mass ratios with a hygroscopicity tandem differential mobility analyzer (HTDMA). The hygroscopic growth of pure alkylammonium salt particles (except for DEACl) reveals gradual water uptake over the whole studied range of relative humidities (RHs). In general, the impact of the presence of alkylammonium chloride on the phase behavior and hygroscopic growth of mixtures depends on the chemical composition of particles and volume fraction of the alkylammonium chloride in the mixtures. For alkylammonium/(NH4)2SO4 mixed particles (except for TMACl/(NH4)2SO4), the hygroscopic growth shows a smooth growth tendency when the organic content is high, while the deliquescence transition is observed for alkylammonium salt/NaCl mixtures at all mass ratios. Regarding the different mixtures of alkylammonium/Ca(NO3)2 particles, continuous water uptake without phase transition is observed over the studied RH range, indicating that alkylammonium salts impose no effect on the liquid-like state of calcium nitrate. The alkylammonium/Na2SO4 mixtures show obvious particle shrinkage prior to the deliquescence point. A similar behavior is also observed for alkylammonium salt/NaCl mixtures. The observed diameter reduction can be attributed to the transformation of porous or irregularly shaped solid particles into more compact near-spherical particles. In the following, measured growth factors (GFs) are compared with values predicted with the Zdanovskii–Stokes–Robinson (ZSR) mixing rule and ideal solution model. The ZSR predictions for different alkylammonium/inorganic mixtures are similar to the measured GFs as long as the mixed particles are in a liquid-like state. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0321314
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