Über Beziehungen zwischen Koagulation, elektrokinetischen Wanderungs-geschwindigkeiten, Ionenhydratation und chemischer Beeinflussung

Tuorila, Pauli

doi:10.1007/bf02555468

Cited by 46 publications

(6 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…4 and 5 indicate that 2 : 1 electrolytes were more effective than 1 : 1 electrolytes in increasing adsorption of HPAN. The order of cation effectiveness at 0.003 N concentration (Mg ~+ > Ca s+ > Ba ~+) was similar to that reported for reduction in zeta potential of kaolinite (Tuorila, 1928) .001…”

Section: And Discussionsupporting

confidence: 82%

“…1) was in the order Th 4+ > Ca 2+ > Ba 2+ > I-I + > NI-I~ > K + > Na +. This order is similar to the effect of such cations on the reduction of zeta potential of clays (Jenny and Reitmeier, 1935;Tuorila, 1928). Since both the clay and ttPAN are essentially polyanionic, a reduction in the magnitude of the potential barrier should increase the possibility of approach and attachment of an HPAN molecule to an adsorption site on the clay.…”

Section: And Discussionmentioning

confidence: 62%

“…Anion exchange on clays has been demonstrated (Dean and l~ubins, 1947;McAuliffe et al, 1948), but the exchange in some instances is accompanied by transformations in the crystal lattice (Low and Black, 1948;Romo and Roy, 1957;Schofield, 1940). Univalent anions have little effect on zeta potential of clay (Tuorila, 1928), but their marked effect on properties of colloidal systems has been ascribed to differences in electric field strength (Voet, 1937).…”

Section: And Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Adsorption of Hydrolyzed Polyacrylonitrile on Kaolinite

Mortensen

1960

Clays clay miner. (Natl. Conf. Clays Clay Miner.)

View full text Add to dashboard Cite

Adsorption experiments were conducted by mixing homoionic kaolinite and C14-1abeled hydrolyzed polyacrylonitrile (HPAN) in water and solutions oi electrolytes. Langmuir type adsorption isotherms resulted. Exchange cations on kaolinite increased adsorption in approximately the same order as such cations reduce zeta potential, i.e. Th 4+ :>Ca ~+ ~Ba ~+ ~H + ~NH4+ ~K § ~Na +. The anomalous increase in adsorption in the presence of polyvalent exchange cations suggested adsorption at the site of base exchange salt formation. Sorbed anions increased adsorption of HPAN in the order of electronegativity, i.e. F-~OH-~H2PO ~ ~C1-~CHaCO0-~NOT-An increase in the concentration oi electrolyte and acidity of the adsorbate medium increased adsorption of HPAN. This effect was apparently due to the reduction of electrostatic repulsion between HPAN and kaolinite and a reduction in size of the polymer coil. Divalent cations, especially the transition metals capable of being complexed by HPAN, were more effective than univalent cations. Dissolution of the clay lattice caused desorption of HPAN. HPAN adsorption reduced the intensity of the OH and O-A1-OH bands in infrared absorption spectra of the kaolinite. Preadsorption of aurintricarboxylic acid blocked adsorption of HPAN, suggesting that "positive spots" due to exposed lattice aluminum on edges of the clay platelets were adsorption sites.

show abstract

Section: And Discussionsupporting

confidence: 82%

Section: And Discussionmentioning

confidence: 62%

Section: And Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption of Hydrolyzed Polyacrylonitrile on Kaolinite

Mortensen

1960

Clays clay miner. (Natl. Conf. Clays Clay Miner.)

View full text Add to dashboard Cite

show abstract

“…The zeta, or electrokinetic, potential (ζ) is the effective charge energy of a solvated solute. It can be used to assess how well dispersed colloids remain in solution [1, 2, 3], and to model the electrokinetic behavior in adsorption processes. Protein-based therapeutics may be formulated at high concentrations that are prone to aggregation.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic radius coincides with the slip plane position in the electrokinetic behavior of lysozyme

Grisham

Nanda

2018

Proteins

View full text Add to dashboard Cite

The zeta potential (ζ) is the effective charge energy of a solvated protein, describing the magnitude of electrostatic interactions in solution. It is commonly used in the assessment of adsorption processes and dispersion stability. Predicting ζ from molecular structure would be useful to the structure-based molecular design of drugs, proteins, and other molecules that hold charge-dependent function while remaining suspended in solution. One challenge in predicting ζ is identifying the location of the slip plane (X ), a distance from the protein surface where ζ is theoretically defined. This study tests the hypothesis that the X can be estimated by the Stokes-Einstein hydrodynamic radius (R ), using globular hen egg white lysozyme as a model system. Although the X and R differ in their theoretical definitions, with the X being the position of the ζ during electrokinetic phenomena (e.g., electrophoresis) and the R being a radius pertaining to the edge of solvation during diffusion, they both represent the point where water and ions no longer adhere to a molecule. This work identifies the limited range of ionic strengths in which the X can be determined using diffusivity measurements and the Stokes-Einstein equation. In addition, a computational protocol is developed for determining the ζ from a protein crystal structure. At low ionic strengths, a hyperdiffusivity regime exists, requiring direct measurement of electrophoretic mobility to determine ζ. This work, therefore, supports a basic tenant of EDL theory that the electric double layer during diffusion and electrophoresis are equivalent in the Stokes-Einstein regime.

show abstract

“…47, 257 (1904). (8) Heyrovsky, J.: "Polarographie" in W. Bóttger's Physikalische Methoden der Analytischen Chemie, Vol. (10) Klemenc, A.: Z. physik.…”

unclassified

The Effect of Electrolytes on the Cataphoretic Mobility of Colloidal Carbon.

Ts'ai¹,

Chiang²

1941

J. Phys. Chem.

View full text Add to dashboard Cite

Although the colloidal properties of a large number of sols have been studied, very little is known about the nature of colloidal carbon. Carbon is used in many industries, especially in the manufacture of ink. Chinese ink, for example, is essentially a colloidal dispersion of carbon, with gelatin as the protective agent. Some knowledge of the colloidal properties of carbon is therefore of practical importance. In this laboratory we plan a

show abstract

Über Beziehungen zwischen Koagulation, elektrokinetischen Wanderungs-geschwindigkeiten, Ionenhydratation und chemischer Beeinflussung

Cited by 46 publications

References 20 publications

Adsorption of Hydrolyzed Polyacrylonitrile on Kaolinite

Adsorption of Hydrolyzed Polyacrylonitrile on Kaolinite

Hydrodynamic radius coincides with the slip plane position in the electrokinetic behavior of lysozyme

The Effect of Electrolytes on the Cataphoretic Mobility of Colloidal Carbon.

Contact Info

Product

Resources

About