• charge effects in the adsorption of polyacrylamides

    Charge effects in the adsorption of polyacrylamides

    Adsorption of relatively high molecular weight non-ionic and anionic polyacrylamides on sodium kaolinite has been studied simultaneously with various flocculation responses (per cent solids settled, settling rate and supernatant clarity) under controlled conditions of

  • charge effects in the adsorption of polyacrylamides

    Charge Effects in the Adsorption of Polyacrylamides

    Charge Effects in the Adsorption of Polyacrylamides on Sodium Kaolinite and Its Flocculation G. ATESOK*, P. SOMASUNDARAN and L. J. MORGAN School of Engineering and Applied Science, Columbia Univeraity, New York, NY 10027 (U.S.A. (Received January 22, 1987; in revised form September 15,1987) SUMMARY Adsorption of relatively high molecular

  • charge effects in the adsorption of polyacrylamides

    Charge effects in the adsorption of polyacrylamides

    Powder Technology, 54 (1988) 77 83 Charge Effects in the Adsorption of Polyacrylamides on Sodium Kaolinite and Its Flocculation G. ATESOK*, P. SOMASUNDARAN and L. J. MORGAN School of Engineering and Applied Science, Columbia University, New York, NY 10027 (US.A.) (Received January 22, 1987; in revised form September 15, 1987 ) 77 SUMMARY Adsorption of relatively high

  • the effect of polyacrylamide charge density and molecular

    The effect of polyacrylamide charge density and molecular

    The molecular weight has only small effect on the adsorption isotherms, where similar behaviour was observed for both C 496 and C 446. Download : Download full-size image; Fig. 5. Adsorption isotherms for 50 g/l (2% volume fraction) of kaolinite in 10 −3 M NaCl solution as a function of polymer dose at pH 7.

  • adsorption of cationic polyacrylamides onto monodisperse

    Adsorption of cationic polyacrylamides onto monodisperse

    Adsorption of Cationic Polyacrylamides onto Monodisperse Polystyrene Latices and Cellulose Fiber: Effect of Molecular Weight and Charge Density of Cationic Polyacrylamides HIROO TANAKA,1 LARS ODBERG,2 LARS WAGBERG,3 AND TOM LINDSTROM4 Swedish Pulp and Paper Research Institute, Box 5604, S-114 86 Stockholm, Sweden Received January 24, 1989; accepted March 29, 1989

  • adsorption of cationic surfactants on silica. surface

    Adsorption of Cationic Surfactants on Silica. Surface

    The surface charge of Aerosil OX50 in an aqueous dispersion has been studied in the presence of cationic surfactants (alkylpyridinium chlorides and trimethylammonium bromide) as a function of pH and salt concentration. The measurements were complemented with surfactant isotherms. To investigate the effect of the aliphatic surfactant tail, the surface charge−pH curves have also been measured

  • adsorption of cationic, anionic and hydrophobically

    Adsorption of cationic, anionic and hydrophobically

    2003-12-31· The adsorption of modified polyacrylamides (PAM) at the silica surface has been studied by ellipsometry. To study the influence of the type of modification of the polyacrylamide on the adsorption behaviour, we have used cationic, anionic and hydrophobically modified polyacrylamides with varying charge density and degree of hydrophobisation.

  • white powder very high charge degree polyacrylamide

    White Powder Very High Charge Degree Polyacrylamide

    It is the Cationic Polyacrylamide with High Molecular Weight and very high Charge Degree equivalent to Superfloc C496HMW for municipal water treatment and sludge dewatering, it can fit the equipments of belt press filter, Centrifuge or screw dewatering machine; Charge Effects in the Adsorption of Polyacrylamides on

  • successive adsorption of polyacrylamide compounds

    Successive adsorption of polyacrylamide compounds

    Successive adsorption of polyacrylamide compounds from electrolyte solutions on the surface of kaolinitic clay particles Article in Colloid Journal 70(2):148-151 · April 2011 with 7 Reads

  • the flocculation of kaolin suspensions with anionic

    The flocculation of kaolin suspensions with anionic

    The flocculation of kaolin suspensions with anionic polyacrylamides of varying molar mass and anionic character, 2. Polarographic study of the adsorption of anionic polyacrylamides onto clay

  • influence of polymer charge type and density on

    INFLUENCE OF POLYMER CHARGE TYPE AND DENSITY ON

    and kaolinite. The relationship between charge-type and polymer adsorption, and the relationship between charge-density and cationic-polymer adsorption onto the soil, was similar to those associated with mont-morillonite. However, the effect of charge-density on adsorption of anionic polymers onto the soil differed from that for montmorillonite

  • adsorption of colloidal platinum nanoparticles to

    Adsorption of Colloidal Platinum Nanoparticles to

    Adsorption of colloidal nanoparticles to surfaces and supports is a convenient approach to heterogeneous catalysts, polymer additives, or wastewater treatment. We investigated the adsorption efficiency of laser-generated and initially ligand-free platinum nanoparticles to TiO2 supports as a function of pH, ionic strength, and ligand surface coverage.

  • adsorption of cationic surfactants on silica. comparison

    Adsorption of Cationic Surfactants on Silica. Comparison

    The adsorption of alkylpyridinium surfactants on Aerosil OX50 silica has been studied as a function of surfactant concentration, aliphatic chain length, pH, and ionic strength in solution. The adsorption isotherms are complemented by electrophoretic mobility measurements. The experimental results have been compared with calculations based on the SCFA theory for adsorption on a charge

  • charge density and ph effects on polycation adsorption

    Charge Density and pH Effects on Polycation Adsorption

    Charge Density and pH Effects on Polycation Adsorption on Poly-Si, SiO2, and Si3N4 Films and Impact on Removal During Chemical Mechanical Polishing

  • polyacrylamide

    Polyacrylamide

    Polyacrylamide (IUPAC poly(2-propenamide) or poly(1-carbamoylethylene), abbreviated as PAM) is a polymer (-CH 2 CHCONH 2-) formed from acrylamide subunits. It can be synthesized as a simple linear-chain structure or cross-linked, typically using N,N '-methylenebisacrylamide.In the cross-linked form, the possibility of the monomer being present is reduced even further.

  • white powder very high charge degree polyacrylamide

    White Powder Very High Charge Degree Polyacrylamide

    It is the Cationic Polyacrylamide with High Molecular Weight and very high Charge Degree equivalent to Superfloc C496HMW for municipal water treatment and sludge dewatering, it can fit the equipments of belt press filter, Centrifuge or screw dewatering machine; Charge Effects in the Adsorption of Polyacrylamides on

  • equilibrium adsorption studies of polysaccharides on talc

    Equilibrium adsorption studies of polysaccharides on talc

    Abstract. The effect of molecular weight, charge and the presence of the cations Ca 2+, Mg 2+ and K + on the adsorption of carboxymethyl cellulose on pure talc obtained from Balmat, New York, were investigated. Higher adsorption densities were obtained in the presence of Ca 2+ and Mg 2+ ions than with K + ions, and higher ionic strength solutions resulted in higher adsorption densities.

  • successive adsorption of polyacrylamide compounds

    Successive adsorption of polyacrylamide compounds

    Successive adsorption of polyacrylamide compounds from electrolyte solutions on the surface of kaolinitic clay particles Article in Colloid Journal 70(2):148-151 · April 2011 with 7 Reads

  • the flocculation of kaolin suspensions with anionic

    The flocculation of kaolin suspensions with anionic

    The flocculation of kaolin suspensions with anionic polyacrylamides of varying molar mass and anionic character, 2. Polarographic study of the adsorption of anionic polyacrylamides onto clay

  • soil science society of america journal abstract soil

    Soil Science Society of America Journal Abstract Soil

    2005-06-24· Effect of polyampholyte-bentonite interactions on the properties of saltwater mud Applied Clay Science 2018 163 Comparison of adsorption affinity of anionic and cationic polyacrylamides for montmorillonite surface in the presence of chromium(VI) ions Adsorption 2019 25:1

  • effects of polymer molecular weight on adsorption

    Effects of Polymer Molecular Weight on Adsorption

    The effects of polyacrylamide (PAM) molecular weights (MWs) on the PAM adsorption capacities and PAM-mediated flocculation of kaolinite suspensions were investigated using a series of nonionic PAMs with different MWs. Adsorption tests using aqueous kaolinite suspensions dosed with a series of PAMs with MWs of 1.5 kg/mol, 10 kg/mol, 0.6–1 Mg/mol, 5–6 Mg/mol, and 18 Mg/mol (referred to as 1

  • layer charge effects on adsorption and diffusion

    Layer Charge Effects on Adsorption and Diffusion

    2019-10-28· Molecular simulations using classical force fields were performed to study the adsorption and diffusion properties of water and ions in the high-charge (Arizona-type) montmorillonite clays with varying relative humidity (RH) at 298.15 K. The simulation results of basal distances derived from swelling free energy curves and of water uptake are in good agreement with experiments. Overall, the

  • adsorption of polyacrylamides on kaolinite and its

    Adsorption of Polyacrylamides on Kaolinite and Its

    Adsorption of Polyacrylamides on Kaolinite and Its Flocculation and Stabilization P SOMASUNDARAN. Y. H. CHIA. and R. GORELIK Henry Krumb School of Mines. Columbia University. N~' York. NY 10027 Adsorption of nonionic and anionic polyacrylamides on kaolinite clay is studied together with various flocculation properties (settling rate, sediment

  • adsorption of cationic, anionic and hydrophobically

    Adsorption of cationic, anionic and hydrophobically

    2003-12-31· The adsorption of modified polyacrylamides (PAM) at the silica surface has been studied by ellipsometry. To study the influence of the type of modification of the polyacrylamide on the adsorption behaviour, we have used cationic, anionic and hydrophobically modified polyacrylamides with varying charge density and degree of hydrophobisation. The adsorbed amount

  • factor affecting adsorption emedicalprep

    Factor Affecting Adsorption eMedicalPrep

    Factor Affecting Adsorption. Factors which affect the extent of adsorption . The following are the factors which affect the adsorption, (1) Nature of the adsorbate (gas) and adsorbent (solid) (i) In general, easily liquefiable gases e.g., CO 2, NH 3, Cl 2 and SO 2 etc. are adsorbed to a greater extent than the elemental gases e.g. H 2, O 2, N 2, He etc. (while chemisorption is specific in nature.)

  • effect of cationic polyacrylamide adsorption kinetics

    Effect of Cationic Polyacrylamide Adsorption Kinetics

    The effect of polymer adsorption kinetics and ionic strength on the dynamics of particle flocculation was quantified using a model system consisting of precipitated calcium carbonate (PCC) and cationic polyacrylamide (CPAM) at a low shear rate. All early flocculations detectable by a photodispersion analyzer (PDA) happened in nonequilibrium polymer adsorption regimes.

  • (pdf) adsorption of cationic polyacrylamides onto

    (PDF) Adsorption of cationic polyacrylamides onto

    Adsorption of cationic polyacrylamides onto monodisperse polystyrene latices and cellulose fiber: Effect of molecular weight and charge density of cationic polyacrylamides

  • adsorption of charged and uncharged polyacrylamides

    ADSORPTION OF CHARGED AND UNCHARGED POLYACRYLAMIDES

    Abstract. Adsorption of aCrylallide tBsed homo and copolymers on hematite was investigated as a function of the nature of the polr-er charge and functionality of the polymer. Effect of addition of sodium dodecylsulfonate and dodecylamine hydrochloride was also studied and was determined

  • acetamide and polyacrylamide adsorption onto

    ACETAMIDE AND POLYACRYLAMIDE ADSORPTION ONTO

    Abstract--The adsorption of acetamide and partly hydrolyzed polyacrylamides onto montmorillonite has been investigated with emphasis on the valency of the exchangeable cation of the clay and the ionic strength of the medium. A difference in the adsorption of acetamide from 3 mg/g to 0.6 mg/g was observed when a Na+-clay was changed to a AP+-clay. For polyacrylamide, an opposite effect was

  • adsorption of cationic, anionic and hydrophobically

    Adsorption of cationic, anionic and hydrophobically

    The adsorption of modified polyacrylamides (PAM) at the silica surface has been studied by ellipsometry. To study the influence of the type of modification of the polyacrylamide on the adsorption behaviour, we have used cationic, anionic and hydrophobically modified polyacrylamides with varying charge density and degree of hydrophobisation. The adsorbed amount and adsorbed layer thickness

  • adsorption of citric acid on cerium oxide nanoparticles

    Adsorption of citric acid on cerium oxide nanoparticles

    ADSORPTION OF CITRIC ACID ON CERIUM OXIDE NANOPARTICLES (NANOCERIA): EFFECTS OF pH, SURFACE CHARGE AND AGGREGATION by Induni Wathsala Siriwardane A thesis submitted in partial fulfillment of the requirements for the Master of Science degree in Chemistry in the Graduate College of The University of Iowa July 2012

  • soil science society of america journal abstract soil

    Soil Science Society of America Journal Abstract Soil

    2005-06-24· Effect of polyampholyte-bentonite interactions on the properties of saltwater mud Applied Clay Science 2018 163 Comparison of adsorption affinity of anionic and cationic polyacrylamides for montmorillonite surface in the presence of chromium(VI) ions Adsorption 2019 25:1

  • bridging adsorption of cationic polyacrylamides in

    Bridging Adsorption Of Cationic Polyacrylamides In

    Recently, cationic polyacrylamides (CPAM) have been successfully applied in water shutoff treatments of oil and gas wells. These polymers adsorb strongly on reservoir rocks, building up an adsorbed layer of significant thickness. Moreover, under high rates, the coiled macromolecules stretch and can bridge large pore throats. This so-called

  • effects of polymer molecular weight on adsorption

    Effects of Polymer Molecular Weight on Adsorption

    Effects of Polymer Molecular Weight on Adsorption and Flocculation in Aqueous Kaolinite Suspensions Dosed with Nonionic Polyacrylamides Byung Joon Lee 1,* and Mark A. Schlautman 2 1 Department of Construction and Environmental Engineering, Kyungpook National University, 2559 Gyeongsang-daero, Sangju, Gyeongbuk 742-711, Korea

  • comparison of adsorption affinity of anionic and cationic

    Comparison of adsorption affinity of anionic and cationic

    At pH 5 there is the point of zero charge of montmorillonite and adsorption of anionic polyacrylamide chains (whose carboxyl groups are totally dissociated, Table 1) can lead to electrosteric interactions between the solid particles covered with the AN PAM layers. But the greatest effect of montmorillonite suspension destabilization (among all

  • equilibrium adsorption studies of polysaccharides on talc

    Equilibrium adsorption studies of polysaccharides on talc

    Abstract. The effect of molecular weight, charge and the presence of the cations Ca 2+, Mg 2+ and K + on the adsorption of carboxymethyl cellulose on pure talc obtained from Balmat, New York, were investigated. Higher adsorption densities were obtained in the presence of Ca 2+ and Mg 2+ ions than with K + ions, and higher ionic strength solutions resulted in higher adsorption densities.

  • adsorption of polyacrylamides on mineral surfaces

    Adsorption of polyacrylamides on mineral surfaces

    The adsorption of neutral and hydrolyzed polyacrylamides, which are currently used in enhanced oil recovery, on minerals the surfaces of which carry silanol and aluminol groups such as siliceous minerals and akolinite is studied. All experiments are conducted in batch on powdered minerals. The

  • factor affecting adsorption emedicalprep

    Factor Affecting Adsorption eMedicalPrep

    Factor Affecting Adsorption. Factors which affect the extent of adsorption . The following are the factors which affect the adsorption, (1) Nature of the adsorbate (gas) and adsorbent (solid) (i) In general, easily liquefiable gases e.g., CO 2, NH 3, Cl 2 and SO 2 etc. are adsorbed to a greater extent than the elemental gases e.g. H 2, O 2, N 2, He etc. (while chemisorption is specific in nature.)

  • surface chemistry and charge of cellulosic fibres

    Surface chemistry and charge of cellulosic fibres

    Surface chemistry and charge of cellulosic fibres Per Stenius PS Interfaces, Stockholm Laboratory of Forest Products Chemistry. Aalto University, Helsinki/Espoo, Finland [email protected] . 2 Scots Pine (Pinus silvestris) A renewable, biodegradable, environmentally benign material . 3 Structure of the stem Pith– the central part of the wood, that is formed durig its first year of growth Xylem

  • the effect of surface charge on photocatalytic degradation

    The effect of surface charge on photocatalytic degradation

    Additionally, the effect of pH on the surface charge was monitored by XPS to determine the amount of hydroxyl groups on the TiO2 NPs surface. Furthermore, the photocatalytic activity of the

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