Formation and development of salt crusts on soil surfaces

Handle URI:
http://hdl.handle.net/10754/621651
Title:
Formation and development of salt crusts on soil surfaces
Authors:
Dai, Sheng; Shin, Hosung; Santamarina, Carlos ( 0000-0001-8708-2827 )
Abstract:
The salt concentration gradually increases at the soil free surface when the evaporation rate exceeds the diffusive counter transport. Eventually, salt precipitates and crystals form a porous sodium chloride crust with a porosity of 0.43 ± 0.14. After detaching from soils, the salt crust still experiences water condensation and salt deliquescence at the bottom, brine transport across the crust driven by the humidity gradient, and continued air-side precipitation. This transport mechanism allows salt crust migration away from the soil surface at a rate of 5 μm/h forming salt domes above soil surfaces. The surface characteristics of mineral substrates and the evaporation rate affect the morphology and the crystal size of precipitated salt. In particular, substrate hydrophobicity and low evaporation rate suppress salt spreading.
KAUST Department:
Earth Science and Engineering Program
Citation:
Dai S, Shin H, Santamarina JC (2015) Formation and development of salt crusts on soil surfaces. Acta Geotechnica 11: 1103–1109. Available: http://dx.doi.org/10.1007/s11440-015-0421-9.
Publisher:
Springer Nature
Journal:
Acta Geotechnica
Issue Date:
14-Dec-2015
DOI:
10.1007/s11440-015-0421-9
Type:
Article
ISSN:
1861-1125; 1861-1133
Sponsors:
This work has been supported by the Goizueta Foundation and US Department of Energy. Constructive comments from two anonymous reviewers have greatly improved this manuscript.
Appears in Collections:
Articles; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorDai, Shengen
dc.contributor.authorShin, Hosungen
dc.contributor.authorSantamarina, Carlosen
dc.date.accessioned2016-11-03T13:21:54Z-
dc.date.available2016-11-03T13:21:54Z-
dc.date.issued2015-12-14en
dc.identifier.citationDai S, Shin H, Santamarina JC (2015) Formation and development of salt crusts on soil surfaces. Acta Geotechnica 11: 1103–1109. Available: http://dx.doi.org/10.1007/s11440-015-0421-9.en
dc.identifier.issn1861-1125en
dc.identifier.issn1861-1133en
dc.identifier.doi10.1007/s11440-015-0421-9en
dc.identifier.urihttp://hdl.handle.net/10754/621651-
dc.description.abstractThe salt concentration gradually increases at the soil free surface when the evaporation rate exceeds the diffusive counter transport. Eventually, salt precipitates and crystals form a porous sodium chloride crust with a porosity of 0.43 ± 0.14. After detaching from soils, the salt crust still experiences water condensation and salt deliquescence at the bottom, brine transport across the crust driven by the humidity gradient, and continued air-side precipitation. This transport mechanism allows salt crust migration away from the soil surface at a rate of 5 μm/h forming salt domes above soil surfaces. The surface characteristics of mineral substrates and the evaporation rate affect the morphology and the crystal size of precipitated salt. In particular, substrate hydrophobicity and low evaporation rate suppress salt spreading.en
dc.description.sponsorshipThis work has been supported by the Goizueta Foundation and US Department of Energy. Constructive comments from two anonymous reviewers have greatly improved this manuscript.en
dc.publisherSpringer Natureen
dc.subjectDesertificationen
dc.subjectEfflorescenceen
dc.subjectEvaporationen
dc.subjectPorous mediaen
dc.subjectSalten
dc.titleFormation and development of salt crusts on soil surfacesen
dc.typeArticleen
dc.contributor.departmentEarth Science and Engineering Programen
dc.identifier.journalActa Geotechnicaen
dc.contributor.institutionSchool of Civil and Environmental Engineering, Georgia Institute of Technology, 790 Atlantic Drive, Atlanta, GA, United Statesen
dc.contributor.institutionSchool of Civil and Environmental Engineering, University of Ulsan, Daehak-ro 102, Nam-gu, Ulsan, South Koreaen
kaust.authorSantamarina, Carlosen
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