Conditions Affecting Formation of the Montmorillonite-Polyacrylic Acid Bond

Warkentin, B. P.; Miller, R. D.

doi:10.1097/00010694-195801000-00003

Cited by 16 publications

(4 citation statements)

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“…If both a sodium hosphate and a polymer are added to a clay suspension, then there will %e competition between them for the aluminium ions on the clay. This was shown by Warkentin and Miller (1958) using polymetaphosphate and PAA on Na-montmorillonite and indirect1 by Mortensen (1959) for sodium pyrophosphate and PAA on Na-kao P inite.…”

Section: Discussionmentioning

confidence: 88%

The Effect of Polymers on the Swelling of Montmorillonite

Emerson¹

1963

Journal of Soil Science

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Section: Discussionmentioning

confidence: 88%

The Effect of Polymers on the Swelling of Montmorillonite

Emerson¹

1963

Journal of Soil Science

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“…Variation of filtration rate with flocculant molecular weight as reported by La Mer and Healy (1963) and Walles (1968) has suggested that the more important parameter is not how much polymer has adsorbed onto the surface of the suspended particles, but the length of the extended polymer chain into the solution which affects the probability of a collision and the probability of forming a bridge. Warkentin and Miller (1958) have demonstrated that long anionic polymers can better remove turbidity than can short-chain polymers of the same degree of solubilization. In light of these results, the decrease in the flocculating capacity of the sheared polyelectrolyte solutions is explained below.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Effect of Shear on Polymer Aided Flocculation of Suspensions

Sylvester¹,

Toure²

1978

Ind. Eng. Chem. Prod. Res. Dev.

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The effect of shear on the flocculating effectiveness of two cationic polymers (NALCO 671 and Aquafloc 418), two anionic polymers (NALCO 8175 and 8170), and one nonionic polymer (NALCO 110-A) was evaluated. The flocculating effectiveness of the polymers tested was determined by conducting jar tests on 1 wt % kaolinite suspensions. The jar tests showed that each polymer possessed an optimum flocculation concentration resulting in a maximum reduction in turbidity. Shearing of the polymer solutions resulted in degradation of the polymer molecules, manifested by a decrease in solution viscosity. Degradation increased with increasing shearing time and continuously decreased the flocculation effectiveness of the polymers.

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“…These data suggest that HPAN is adsorbed on the edges of kaolinite platelets on positively charged sites (Ford, Loomis and "Fidiam, 1940;Schofield, 1940) of exposed lattice aluminum. Rheological (Street, 1959;Packter, 1957), swelling (Emerson, 1956;Warkentin and Miller, 1958), and surface (~Beischer, 1953;Thiessen, 1942) studies also suggest that polyanions are adsorbed on the edges of clay platelets.…”

Section: Normality Of Solution Electrolytementioning

confidence: 99%

“…Present address: Department of Agronomy, Ohio State University, Columbus, Ohio. 53O Emerson, 1956), displacement of water of hydration (M. E. Wadsworth and A. C. Peck, private communication, 1958) and ionic interaction with (001) edges of clay (Street, 1959;Packter, 1957;Warkentin and Miller, 1958) have been proposed as bonding mechanisms, but the evidence in support of these theories has been of indirect nature. The effect of exchange cations and anions and solution electrolytes on adsorption of synthetic polyelectrolytes on clays has not been adequately evaluated (Bergmann and Fiedler, 1956).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Hydrolyzed Polyacrylonitrile on Kaolinite

Mortensen

1960

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

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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.

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Conditions Affecting Formation of the Montmorillonite-Polyacrylic Acid Bond

Cited by 16 publications

References 0 publications

The Effect of Polymers on the Swelling of Montmorillonite

The Effect of Polymers on the Swelling of Montmorillonite

Effect of Shear on Polymer Aided Flocculation of Suspensions

Adsorption of Hydrolyzed Polyacrylonitrile on Kaolinite

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