Polyacrylamide-sodium kaolinite interactions: Flocculation behavior of polymer clay suspensions

Nabzar, L.; Pefferkorn, E.; Varoqui, R.

doi:10.1016/0021-9797(84)90240-6

Cited by 78 publications

(40 citation statements)

References 21 publications

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“…These values are similar to the free energy of formation of 1 mol of hydrogen bonds of −20.9 kJ/mol (13,14), suggesting that adsorption of anionic polyacrylamide on kaolinite is facilitated by hydrogen bonding. This corresponds well with the literature in the area which states that polyacrylamide flocculants adsorb to the kaolinite edge hydroxyl groups via hydrogen bonding (1,15,16).…”

Section: Adsorption Isothermssupporting

confidence: 63%

See 1 more Smart Citation

Kinetics of Adsorption of High Molecular Weight Anionic Polyacrylamide onto Kaolinite: The Flocculation Process

Taylor

Morris

Self

et al. 2002

Journal of Colloid and Interface Science

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Section: Adsorption Isothermssupporting

confidence: 63%

“…Several studies have been performed examining the adsorption of polyacrylamide onto kaolinite (1)(2)(3)(4)(5)(6)(7). All authors have concluded that adsorption occurs primarily onto the edge surface of kaolinite, with Lee et al (7) stating that 94% of adsorption takes place at the edge surface.…”

Section: Introductionmentioning

confidence: 97%

Kinetics of Adsorption of High Molecular Weight Anionic Polyacrylamide onto Kaolinite: The Flocculation Process

Taylor

Morris

Self

et al. 2002

Journal of Colloid and Interface Science

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“…Adsorption of PAM on soil and clay mineral surfaces has been demonstrated to be rapid and irreversible in several studies although the degree of adsorption is dependent on PAM conformation, soil or mineral properties, and soil solution characteristics (Hollander et al, 1981;Nabzar et al, 1984Nabzar et al, , 1988Nadler et al, 1992;Pradip and Fuerstnau, 1980;Tanaka et al, 1990). Because of its high affinity for clay mineral surfaces in soil, PAM becomes concentrated in the upper portions of soil profiles to which it is applied in irrigation water.…”

Section: Pam Properties Affecting Efficacymentioning

confidence: 99%

“…H bonding (Kohl and Taylor, 1961;Nabzar et al, 1984Nabzar et al, , 1988 and ligand exchange (Theng, 1982) are often sighted as primary bonding mechanisms. H bonding may occur between polymer amide groups and free hydroxyl groups of the adsorbent surface that are not already bonded with other close hydroxyls (Griot and Kitchener, 1965;Pefferkorn et al, 1990).…”

Section: Pam and Camentioning

confidence: 99%

Polyacrylamide in Agriculture and Environmental Land Management

Sojka

Bjorneberg

Entry

et al. 2007

Advances in Agronomy

347

240

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“…PAA proved a higher suspension stability at low or high concentration than at a medium concentration. 1,2) The sodium salt of polyacrylic acid (Na-PAA) is adsorbed by alumina sites on the edge of kaolinite particles but not on the site of silica on basal plane of particles. 15) The acid form of carboxylic acid of PAA can be adsorbed via hydrogen bonding between the carbonyl group of carboxylic acid and the hydroxyl group on a surface of the kaolinite basal plane.…”

mentioning

confidence: 99%

Effect of Polyvinylpyrrolidone and Sodium Lauroyl Isethionate on Kaolinite Suspension in an Aqueous Phase

Kwan

Chu

Shimabayashi

2006

CHEMICAL & PHARMACEUTICAL BULLETIN

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Kaolinite is a very useful raw material in industries, such as paints, paper, plastics, cosmetics, pharmaceuticals, and ceramics. Rheological properties and/or suspension stability of kaolinite are crucial factors in these products. The rheology and suspension of kaolinite has been studied intensively so far.1-8) Nakagaki M., et al. [3][4][5] provided evidences that the divalent cations exert stronger effect than monovalent cations on a reduced viscosity and Bingham yield value of the suspension. In an aqueous suspension of kaolinite, the -NH group of urea, hydrazine and formamide, and the -OH group of alcohols form the hydrogen bonding with an -SiO group on kaolinite surface to alter fluidity of a suspension. 10,11) In this situation divalent cations manifest stronger effect than monovalent ones on the Bingham yield value.3-6) The edge(ϩ)/face(Ϫ) inter-particle interactions promote aggregation and increase the viscosity of a suspension. On the other hand, adsorption of multivalent anions decreases charge density on the edge, diminishing edge(ϩ)/face(Ϫ) interparticle interaction, which results in reduction of the viscosity. 7)Johnson indicated that the kaolinite edge contains both silica-and alumina-like sites positively charged at low pH, but bears a negative charge at high pH. Kaolinite face contains by contrast only silica-like charge sites and remains negatively charged within a wide pH range. 12,13) Heath and Todros 14) derived both a Bingham yield value and viscosity of kaolin suspension as a function of pH and electrolyte concentration. Their results showed a minimum viscosity around pH 7 and they assumed that the isoelectric point of particle's edges was around pH 7. Adsorption of polyacrylic acid (PAA) on kaolinite particles affected flocculation/dispersion of a suspension solution. PAA proved a higher suspension stability at low or high concentration than at a medium concentration.1,2) The sodium salt of polyacrylic acid (Na-PAA) is adsorbed by alumina sites on the edge of kaolinite particles but not on the site of silica on basal plane of particles.15) The acid form of carboxylic acid of PAA can be adsorbed via hydrogen bonding between the carbonyl group of carboxylic acid and the hydroxyl group on a surface of the kaolinite basal plane.16) Gebhardt and Fuerstenau 17) measured the adsorption amount of PAA by silica. Conceicao et al. 18) probed influence of carboxymethylcellulose on rheological behavior of kaolinite suspension in the presence of ammonium polycarbonate as a dispersant. The presence of carboxymethylcellulose in kaolinite suspension conferred a shear thinning behavior, especially in the low shear rate range, followed by a trend to Newtonian fluid behavior. Na kagaki M., et al. 3,4) pointed out that polyvinylpyrrolidone (PVP) acts on kaolinite suspension as a flocculating agent at concentration lower than 2ϫ10 Ϫ3 %, but as a dispersing agent above that point. Yalcin et al. 19) studied the influence of surfactants (sodium or ammonium dodecyl sulfate, SDS or ADS) on flow behavior of ben...

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Polyacrylamide-sodium kaolinite interactions: Flocculation behavior of polymer clay suspensions

Cited by 78 publications

References 21 publications

Kinetics of Adsorption of High Molecular Weight Anionic Polyacrylamide onto Kaolinite: The Flocculation Process

Kinetics of Adsorption of High Molecular Weight Anionic Polyacrylamide onto Kaolinite: The Flocculation Process

Polyacrylamide in Agriculture and Environmental Land Management

Effect of Polyvinylpyrrolidone and Sodium Lauroyl Isethionate on Kaolinite Suspension in an Aqueous Phase

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