Physical properties of short chain aqueous organosulfate aerosol

Abstract

Organosulfates comprise a significant proportion of the organic fraction of aerosol. Organosulfate aerosol physical properties, such as water activity, density, refractive index, and surface tension, are key to predicting their...

Deactivating Effect of Hydroxyl Radicals Reactivity by Sulfate and Sulfite Functional Groups in Aqueous Phase─Atmospheric Implications for Small Organosulfur Compounds

“…For instance, MS and ES can be formed via the atmospheric processing (e.g., oxidation) of other organosulfates that are commonly found in the atmosphere. 2,22,23 MSA is abundant in marine aerosols, and the ratio of MSA to non-sea-salt sulfate (nss-sulfate) in aerosols is often used to indicate the contribution of biological activities to nss-sulfate in the marine boundary layer. 24−29 HMS has been recently recognized as an important organosulfur compound in urban environments, particularly in winter haze.…”

“…These organosulfur compounds have been detected in atmospheric aerosols. For instance, MS and ES can be formed via the atmospheric processing (e.g., oxidation) of other organosulfates that are commonly found in the atmosphere. ,, MSA is abundant in marine aerosols, and the ratio of MSA to non-sea-salt sulfate (nss-sulfate) in aerosols is often used to indicate the contribution of biological activities to nss-sulfate in the marine boundary layer. − HMS has been recently recognized as an important organosulfur compound in urban environments, particularly in winter haze. − There are fewer reports on atmospheric occurrence of HES, but it is chosen to examine the effect of an additional −CH 2 group on the reactivity as compared to HMS.…”

Predicting Hygroscopic Growth of Organosulfur Aerosol Particles Using COSMOtherm

“…When in equilibrium with surrounding RH, the degree of water uptake (i.e., hygroscopicity) largely affects aerosol phase states, optical properties, chemical reactivity, and cloud formation potential. A range of laboratory studies have investigated the hygroscopicity for both commercially available and synthesized OS compounds under sub-saturated (RH<100%) conditions (Hansen et al, 2015;Estillore et al, 2016;Peng et al, 2021Peng et al, , 2022Ohno et al, 2022;Bain et al, 2023). Inorganic salts typically show distinct deliquescence and efflorescence RH (DRH and ERH) points, while the studied OS compounds consistently show continuous growth with increasing RH.…”