Static permittivity of environmentally relevant low-concentration aqueous solutions of NaCl, NaNO3, and Na2SO4

dc.contributor.author Gorji, Amin
dc.contributor.author Bowler, Nicola
dc.contributor.author Bowler, Nicola
dc.contributor.department Electrical and Computer Engineering
dc.contributor.department Materials Science and Engineering
dc.contributor.department Center for Nondestructive Evaluation (CNDE)
dc.date 2020-07-07T20:52:48.000
dc.date.accessioned 2020-07-09T11:46:30Z
dc.date.available 2020-07-09T11:46:30Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 2020
dc.date.embargo 2021-07-01
dc.date.issued 2020-07-01
dc.description.abstract <p>In this paper, the result of a systematic study and molecular mechanisms governing the dielectric spectra of aqueous solutions of NaCl, NaNO3, and Na2SO4 with environmentally relevant concentrations (∼mmol/l) are presented, for frequencies from 200 MHz up to 20 GHz and at temperature 25.00 ± 0.01 °C. The measured spectra were fitted with a Debye relaxation model using a non-linear, weighted, least-squares analysis. Conductivity was measured independently to reduce uncertainty in obtaining other parameters by spectral fitting. Careful experimentation provided dielectric data of sufficiently low uncertainty to enable observation of polarization mechanisms that emerge only in the low-concentration regime. The data were fitted by a concentration-dependent parametric model that includes terms accounting for internal depolarizing fields and the solvent dilution effect (mixture relation), the kinetic depolarization effect, the dielectric saturation effect, and the Debye–Falkenhagen effect that accounts for the contribution of ionic atmosphere polarization. It has been shown that, in NaCl and NaNO3 solutions at sufficiently low concentrations, the static permittivity increases due to the Debye–Falkenhagen effect. It has also been shown that, to calculate the number of irrotationally bound water molecules ZIB, the measured static permittivity values should be corrected to account for the contributions of kinetic depolarization and Debye–Falkenhagen effects. Otherwise, unrealistic values of ZIB are obtained. An explanation for the different strengths of the Debye–Falkenhagen effect observed for the different electrolyte solutions, essentially due to the electrophoretic effect and coordination number, is also presented.</p>
dc.description.comments <p>This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Gorji, Amin, and Nicola Bowler. "Static permittivity of environmentally relevant low-concentration aqueous solutions of NaCl, NaNO3, and Na2SO4." <em>The Journal of Chemical Physics</em> 153, no. 1 (2020): 014503 and may be found at DOI: <a href="https://doi.org/10.1063/1.5144301" target="_blank">10.1063/1.5144301</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/mse_pubs/378/
dc.identifier.articleid 1381
dc.identifier.contextkey 18408288
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath mse_pubs/378
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/92861
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/mse_pubs/378/2020_BowlerNicola_StaticPermittivity.pdf|||Fri Jan 14 23:51:17 UTC 2022
dc.source.uri 10.1063/1.5144301
dc.subject.disciplines Biological and Chemical Physics
dc.subject.disciplines Environmental Health and Protection
dc.subject.disciplines Materials Science and Engineering
dc.subject.keywords Dielectric spectroscopy
dc.subject.keywords Ionic conductivity
dc.subject.keywords Dielectric relaxation spectroscopy
dc.subject.keywords Chemical bonding
dc.subject.keywords Material characterization methods
dc.subject.keywords Debye model
dc.subject.keywords Debye-Huckel equation
dc.subject.keywords Polarization
dc.subject.keywords Dielectric properties
dc.subject.keywords Electrolytes
dc.title Static permittivity of environmentally relevant low-concentration aqueous solutions of NaCl, NaNO3, and Na2SO4
dc.type article
dc.type.genre article
dspace.entity.type Publication
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relation.isOrgUnitOfPublication bf9f7e3e-25bd-44d3-b49c-ed98372dee5e
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