High ionic strength electrokinetics of anatase in the presence of multivalent inorganic ions

Marek Kosmulski; Jarl B. Rosenholm

doi:10.1016/j.colsurfa.2004.09.009

High ionic strength electrokinetics of anatase in the presence of multivalent inorganic ions

Marek Kosmulski, Jarl B. Rosenholm

Molekylääritieteen ja -tekniikan laboratorio

Tutkimustuotos: Lehtiartikkeli › Artikkeli › Tieteellinen › vertaisarvioitu

16 Sitaatiot (Scopus)

Abstrakti

Shifts in the IEP of anatase induced by various combinations of 1:1 electrolytes (at concentration of 0.5 mol dm-3) and multivalent ions (concentrations in millimolar range) were studied. The high ionic strength enhanced the shift in the IEP of anatase to high pH induced by specific adsorption of barium and suppressed the shift in the IEP of anatase to low pH induced by specific adsorption of phosphate. The ζ potential of anatase at pH 3-5 is nearly zero in the presence of 0.01 mol dm-3 of sulfate at low ionic strength, but it assumes a positive value as high as 15 mV in the presence of 0.5 mol dm-3 NaI at otherwise the same conditions. Apparently, the contribution of 1:1 electrolytes to the surface charging at high ionic strengths is not mere neutralisation of the proton charge. © 2004 Elsevier B.V. All rights reserved.

Alkuperäiskieli	Englanti
Sivut	121-126
Sivumäärä	6
Julkaisu	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Vuosikerta	248
Numero	1-3
DOI - pysyväislinkit	https://doi.org/10.1016/j.colsurfa.2004.09.009
Tila	Julkaistu - syysk. 2004
OKM-julkaisutyyppi	A1 Julkaistu artikkeli, soviteltu

Pääsy asiakirjaan

10.1016/j.colsurfa.2004.09.009

Muut tiedostot ja linkit

https://www.mendeley.com/catalogue/78b1bec6-8e15-3773-b4e4-bb9d6958154b/

Viittausmuodot

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title = "High ionic strength electrokinetics of anatase in the presence of multivalent inorganic ions",

abstract = "Shifts in the IEP of anatase induced by various combinations of 1:1 electrolytes (at concentration of 0.5 mol dm-3) and multivalent ions (concentrations in millimolar range) were studied. The high ionic strength enhanced the shift in the IEP of anatase to high pH induced by specific adsorption of barium and suppressed the shift in the IEP of anatase to low pH induced by specific adsorption of phosphate. The ζ potential of anatase at pH 3-5 is nearly zero in the presence of 0.01 mol dm-3 of sulfate at low ionic strength, but it assumes a positive value as high as 15 mV in the presence of 0.5 mol dm-3 NaI at otherwise the same conditions. Apparently, the contribution of 1:1 electrolytes to the surface charging at high ionic strengths is not mere neutralisation of the proton charge. {\textcopyright} 2004 Elsevier B.V. All rights reserved.",

keywords = "Concentrated electrolyte solutions, Electric sonic amplitude, Isoelectric point, Specific adsorption, Zeta potential",

author = "Marek Kosmulski and Rosenholm, {Jarl B.}",

year = "2004",

month = sep,

doi = "10.1016/j.colsurfa.2004.09.009",

language = "English",

volume = "248",

pages = "121--126",

journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",

issn = "0927-7757",

publisher = "Elsevier",

number = "1-3",

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TY - JOUR

T1 - High ionic strength electrokinetics of anatase in the presence of multivalent inorganic ions

AU - Kosmulski, Marek

AU - Rosenholm, Jarl B.

PY - 2004/9

Y1 - 2004/9

N2 - Shifts in the IEP of anatase induced by various combinations of 1:1 electrolytes (at concentration of 0.5 mol dm-3) and multivalent ions (concentrations in millimolar range) were studied. The high ionic strength enhanced the shift in the IEP of anatase to high pH induced by specific adsorption of barium and suppressed the shift in the IEP of anatase to low pH induced by specific adsorption of phosphate. The ζ potential of anatase at pH 3-5 is nearly zero in the presence of 0.01 mol dm-3 of sulfate at low ionic strength, but it assumes a positive value as high as 15 mV in the presence of 0.5 mol dm-3 NaI at otherwise the same conditions. Apparently, the contribution of 1:1 electrolytes to the surface charging at high ionic strengths is not mere neutralisation of the proton charge. © 2004 Elsevier B.V. All rights reserved.

AB - Shifts in the IEP of anatase induced by various combinations of 1:1 electrolytes (at concentration of 0.5 mol dm-3) and multivalent ions (concentrations in millimolar range) were studied. The high ionic strength enhanced the shift in the IEP of anatase to high pH induced by specific adsorption of barium and suppressed the shift in the IEP of anatase to low pH induced by specific adsorption of phosphate. The ζ potential of anatase at pH 3-5 is nearly zero in the presence of 0.01 mol dm-3 of sulfate at low ionic strength, but it assumes a positive value as high as 15 mV in the presence of 0.5 mol dm-3 NaI at otherwise the same conditions. Apparently, the contribution of 1:1 electrolytes to the surface charging at high ionic strengths is not mere neutralisation of the proton charge. © 2004 Elsevier B.V. All rights reserved.

KW - Concentrated electrolyte solutions

KW - Electric sonic amplitude

KW - Isoelectric point

KW - Specific adsorption

KW - Zeta potential

UR - https://www.mendeley.com/catalogue/78b1bec6-8e15-3773-b4e4-bb9d6958154b/

U2 - 10.1016/j.colsurfa.2004.09.009

DO - 10.1016/j.colsurfa.2004.09.009

M3 - Article

SN - 0927-7757

VL - 248

SP - 121

EP - 126

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

IS - 1-3

ER -

High ionic strength electrokinetics of anatase in the presence of multivalent inorganic ions

Abstrakti

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