High ionic strength electrokinetics

Marek Kosmulski; Jarl B. Rosenholm

doi:10.1016/j.cis.2004.09.005

High ionic strength electrokinetics

Marek Kosmulski, Jarl B. Rosenholm

Laboratory of Molecular Science and Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

72 Citations (Scopus)

Abstract

The electrokinetic potentials at high ionic strengths can be measured by means of electroacoustic method. The reported values are surprisingly high: up to 25 mV in 1 mol dm-3 1:1 electrolyte solution. The IEP of metal oxides in concentrated solutions of 1:1 electrolytes shifts to substantially higher pH values with respect to the pristine value, although these electrolytes are inert at low concentration. The shift in the IEP is salt-specific, and it is correlated with the hard-soft character of the anion and of the cation. © 2004 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	93-107
Number of pages	15
Journal	Advances in Colloid and Interface Science
Volume	112
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cis.2004.09.005
Publication status	Published - Mar 2004
MoE publication type	A1 Journal article-refereed

Keywords

Colloid vibration current
Concentrated electrolyte solutions
Electric sonic amplitude
Isoelectric point
Zeta potential

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10.1016/j.cis.2004.09.005

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abstract = "The electrokinetic potentials at high ionic strengths can be measured by means of electroacoustic method. The reported values are surprisingly high: up to 25 mV in 1 mol dm-3 1:1 electrolyte solution. The IEP of metal oxides in concentrated solutions of 1:1 electrolytes shifts to substantially higher pH values with respect to the pristine value, although these electrolytes are inert at low concentration. The shift in the IEP is salt-specific, and it is correlated with the hard-soft character of the anion and of the cation. {\textcopyright} 2004 Elsevier B.V. All rights reserved.",

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AU - Rosenholm, Jarl B.

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AB - The electrokinetic potentials at high ionic strengths can be measured by means of electroacoustic method. The reported values are surprisingly high: up to 25 mV in 1 mol dm-3 1:1 electrolyte solution. The IEP of metal oxides in concentrated solutions of 1:1 electrolytes shifts to substantially higher pH values with respect to the pristine value, although these electrolytes are inert at low concentration. The shift in the IEP is salt-specific, and it is correlated with the hard-soft character of the anion and of the cation. © 2004 Elsevier B.V. All rights reserved.

KW - Colloid vibration current

KW - Concentrated electrolyte solutions

KW - Electric sonic amplitude

KW - Isoelectric point

KW - Zeta potential

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DO - 10.1016/j.cis.2004.09.005

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EP - 107

JO - Advances in Colloid and Interface Science

JF - Advances in Colloid and Interface Science

IS - 1-3

ER -

High ionic strength electrokinetics

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Keywords

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