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Hygroscopic properties of sodium and potassium salts as related to saline mineral dusts and sea salt aerosols
Zhang, Huanhuan1,3; Gu, Wenjun1,3; Li, Yong Jie2; Tang, Mingjin1,3,4
2020-09-01
Source PublicationJournal of Environmental Sciences (China)
ISSN1001-0742
Volume95Pages:65-72
Abstract

Mineral dust, soil, and sea salt aerosols are among the most abundant primary inorganic aerosols in the atmosphere, and their hygroscopicity affects the hydrological cycle and global climate. We investigated the hygroscopic behaviors of six Na- and K-containing salts commonly found in those primary organic aerosols. Their hygroscopic growths as a function of relative humidity (RH) agree well with thermodynamic model prediction. Temperature dependence of deliquescence RH (DRH) values for five of those salts was also investigated, which are comparable to those in literature within 1%–2% RH, most showing negative dependence on temperature. Hygroscopic growth curves of real-world soil and sea salt samples were also measured. The hygroscopic growths of two more-hydroscopic saline soil samples and of sea salt can be predicted by the thermodynamic model based on the measured water-soluble ionic composition. The substantial amounts of water-soluble ions, including Na and K, in saline soil samples imply that even nascent saline soil samples are quite hygroscopic at high-RH (>80%) conditions. For three less-hygroscopic dust samples, however, measurements showed higher water uptake ability than that predicted by the thermodynamic model. The small amount of water taken up by less-hygroscopic dust samples suggests that dust particles might contain thin layers of water even to very low RH. The results of this study provide a comprehensive characterization of the hygroscopicity of Na- and K-containing salts as related to their roles in the hygroscopic behaviors of saline mineral dusts and sea salt aerosols.

KeywordDust Hygroscopicity Potassium Sea Salt Sodium Soil
DOI10.1016/j.jes.2020.03.046
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000548603700009
PublisherSCIENCE PRESS, 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA
Scopus ID2-s2.0-85085102471
Fulltext Access
FWCI0.7231178
Citation statistics
Document TypeJournal article
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorLi, Yong Jie
Affiliation1.State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
2.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Avenida da Universidade, Taipa, Macau, China
3.University of Chinese Academy of Sciences, Beijing, 100049, China
4.Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Zhang, Huanhuan,Gu, Wenjun,Li, Yong Jie,et al. Hygroscopic properties of sodium and potassium salts as related to saline mineral dusts and sea salt aerosols[J]. Journal of Environmental Sciences (China),2020,95:65-72.
APA Zhang, Huanhuan,Gu, Wenjun,Li, Yong Jie,&Tang, Mingjin.(2020).Hygroscopic properties of sodium and potassium salts as related to saline mineral dusts and sea salt aerosols.Journal of Environmental Sciences (China),95,65-72.
MLA Zhang, Huanhuan,et al."Hygroscopic properties of sodium and potassium salts as related to saline mineral dusts and sea salt aerosols".Journal of Environmental Sciences (China) 95(2020):65-72.
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