Interactions of organosulfates with water vapor under sub- and supersaturated conditions

C. Peng; C. Peng; P. N. Razafindrambinina; K. A. Malek; L. Chen; L. Chen; L. Chen; W. Wang; R.-J. Huang; Y. Zhang; Y. Zhang; X. Ding; X. Ding; M. Ge; X. Wang; X. Wang; A. A. Asa-Awuku; A. A. Asa-Awuku; M. Tang; M. Tang; M. Tang

doi:10.5194/acp-21-7135-2021

Atmospheric Chemistry and Physics (May 2021)

Interactions of organosulfates with water vapor under sub- and supersaturated conditions

C. Peng,
C. Peng,
P. N. Razafindrambinina,
K. A. Malek,
L. Chen,
L. Chen,
L. Chen,
W. Wang,
R.-J. Huang,
Y. Zhang,
Y. Zhang,
X. Ding,
X. Ding,
M. Ge,
X. Wang,
X. Wang,
A. A. Asa-Awuku,
A. A. Asa-Awuku,
M. Tang,
M. Tang,
M. Tang

Affiliations

C. Peng: State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Protection and Resources Utilization, and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
C. Peng: CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China
P. N. Razafindrambinina: Department of Chemistry and Biochemistry, College of Computer, Mathematical and Natural Sciences, University of Maryland, College Park, MD 20742, USA
K. A. Malek: Department of Chemical and Biomolecular Engineering, A. James Clark School of Engineering, University of Maryland, College Park, MD 20742, USA
L. Chen: State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Protection and Resources Utilization, and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
L. Chen: CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China
L. Chen: University of Chinese Academy of Sciences, Beijing 100049, China
W. Wang: State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
R.-J. Huang: Key Laboratory of Aerosol Chemistry and Physics, State Key Laboratory of Loess and Quaternary Geology, Institute of Earth and Environment, Chinese Academy of Sciences, Xi'an 710061, China
Y. Zhang: State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Protection and Resources Utilization, and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
Y. Zhang: CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China
X. Ding: State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Protection and Resources Utilization, and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
X. Ding: CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China
M. Ge: State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
X. Wang: State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Protection and Resources Utilization, and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
X. Wang: CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China
A. A. Asa-Awuku: Department of Chemistry and Biochemistry, College of Computer, Mathematical and Natural Sciences, University of Maryland, College Park, MD 20742, USA
A. A. Asa-Awuku: Department of Chemical and Biomolecular Engineering, A. James Clark School of Engineering, University of Maryland, College Park, MD 20742, USA
M. Tang: State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Protection and Resources Utilization, and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
M. Tang: CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China
M. Tang: University of Chinese Academy of Sciences, Beijing 100049, China

DOI: https://doi.org/10.5194/acp-21-7135-2021
Journal volume & issue: Vol. 21
pp. 7135 – 7148

Abstract

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Organosulfates (OSs) are important constituents of secondary organic aerosols, but their hygroscopic properties and cloud condensation nucleation (CCN) activities have not been well understood. In this work we employed three complementary techniques to characterize interactions of several OSs with water vapor under sub- and supersaturated conditions. A vapor sorption analyzer was used to measure mass changes in OS samples with relative humidity (RH, 0 %–90 %); among the 11 organosulfates examined, only sodium methyl sulfate (methyl-OS), sodium ethyl sulfate (ethyl-OS), sodium octyl sulfate (octyl-OS) and potassium hydroxyacetone sulfate were found to deliquesce as RH increased, and their mass growth factors at 90 % RH were determined to be 3.65 ± 0.06, 3.58 ± 0.02, 1.59 ± 0.01 and 2.20 ± 0.03. Hygroscopic growth of methyl-, ethyl- and octyl-OS aerosols was also studied using a humidity tandem differential mobility analyzer (H-TDMA); continuous hygroscopic growth was observed, and their growth factors at 90 % RH were determined to be 1.83 ± 0.03, 1.79 ± 0.02 and 1.21 ± 0.02. We further investigated CCN activities of methyl-, ethyl- and octyl-OS aerosols, and their single hygroscopicity parameters (κccn) were determined to be 0.459 ± 0.021, 0.397 ± 0.010 and 0.206 ± 0.008. For methyl- and ethyl-OS aerosols, κccn values agree reasonably well with those derived from H-TDMA measurements (κgf) with relative differences being < 25 %, whereas κccn was found to be ∼ 2.4 times larger than κgf for octyl-OS, likely due to both the solubility limit and surface tension reduction.

Published in Atmospheric Chemistry and Physics

ISSN: 1680-7316 (Print); 1680-7324 (Online)
Publisher: Copernicus Publications
Country of publisher: Germany
LCC subjects: Science: Physics; Science: Chemistry
Website: http://www.atmospheric-chemistry-and-physics.net/

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