• flocculation of colloidal silica with polyacrylamide

    Flocculation of colloidal silica with polyacrylamide

    Flocculation of colloidal silica with polyacrylaniide 467 CONCLUSION The pre-conditioning of silica with surfactants can induce the formation of agglomerates which are more effectively flocculated with polyacrylamide. The colloidal silica suspension studied was flocculated with PAM after pre-treatment with dodecylamine and produced a sediment

  • adsorption and flocculation behavior of cationic

    Adsorption and flocculation behavior of cationic

    Adsorption and flocculation behavior of cationic polyacrylamide and colloidal silica Article in Colloids and Surfaces A Physicochemical and Engineering Aspects 219(1-3):161-172 · June 2003 with

  • flocculation of colloidal silica with polyacrylamide

    Flocculation of colloidal silica with polyacrylamide

    The stability of colloidal silica in the presence of polyacrylamide has been studied by electroacoustic potential measurements and sedimentation testwork. Prior conditioning with AlCl 3 ·6H 2 0 or dodecylamine resulted in more effective action of the polymer.

  • technical note flocculation of colloidal silica with

    TECHNICAL NOTE FLOCCULATION OF COLLOIDAL SILICA WITH

    Flocculation of colloidal silica with polyacrylamide 465 The pH decreasing from 5.5 to 3.8 is consistent with the hydrolysis reactions which generate the active

  • adsorption and flocculation behavior of deepdyve

    Adsorption and flocculation behavior of DeepDyve

    2003-06-19· Read "Adsorption and flocculation behavior of cationic polyacrylamide and colloidal silica, Colloids and Surfaces A: Physicochemical and Engineering Aspects" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at

  • flocculation with levasil colloidal silica nouryon

    Flocculation with Levasil Colloidal Silica Nouryon

    Flocculation is the process of removing unwanted particulates (solids) from liquid, which are otherwise difficult to filter or settle out. At Levasil Colloidal Silica we contribute to your success with innovations in silica chemistry. Discover our broad product portfolio and reliable supply.

  • adsorption and flocculation of cationic polyacrylamide

    Adsorption and flocculation of cationic polyacrylamide

    Adsorption and flocculation of cationic polyacrylamide and colloidal silica Kinetic aspects Article in Internationale Papierwirtschaft IPW · January 2002 with 5 Reads How we measure 'reads'

  • adsorption and flocculation behavior of cationic

    Adsorption and flocculation behavior of cationic

    Polyacrylamide-induced fiber flocculation has been studied during the last decades and the general description of their action is based on known colloidal phenomena . The flocculation process can be divided into two stages; the adsorption of polyelectrolyte onto the fiber surfaces and the subsequent formation of flocs. Once it is distributed in

  • adsorption and flocculation behavior of cationic

    Adsorption and flocculation behavior of cationic

    2003-06-19· The adsorption of cationic polyacrylamide and silica nanoparticle systems onto a model surface has been compared with the adsorption and flocculation of a fiber suspension. An increase in ionic strength affects the polyelectrolyte adsorption in different ways in these two systems. With a silica surface, an increase in the ionic strength leads

  • synthesis of cationic polyacrylamide/silica nanocomposites

    Synthesis of cationic polyacrylamide/silica nanocomposites

    2012-10-05· We describe the preparation and characteristics of cationic polyacrylamide/silica (CPAAm/ASNP) nanocomposites for papermaking. The nanocomposites were successfully prepared by in situ inverse emulsion copolymerizations of acrylamide and [2-(acryloyloxy)ethyl]-trimethylammonium chloride (AOTAC) in the presence of acryl-grafted silica nanoparticles (ASNPs).

  • flocculation of colloidal silica with hydrolyzed

    Flocculation of Colloidal Silica with Hydrolyzed

    Flocculation of colloidal silica with aluminum fractal polymers was investigated by 27Al magic angle spinning and 29Si cross polarization magic angle spinning NMR as a function of aluminum concentration and pH. Aluminum flocculant species were prepared by dilution of a commercially available flocculant, WAC HB, the hydrolysis of which yields Al13 polymers.

  • (pdf) flocculation : a new way to treat the waste water

    (PDF) Flocculation : A New Way to Treat the Waste Water

    Flocculation : A new way to treat the waste water 105 2-sulfoethyl methacrylate is of limited commercial value owing to the hydrolytic instability of the ester linkage.

  • (pdf) regularities of flocculation of silica hydrosol

    (PDF) Regularities of flocculation of silica hydrosol

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  • flocculation of kaolin particles with cationic lignin

    Flocculation of kaolin particles with cationic lignin

    The kaolin suspension has been used as a representative of colloidal systems for decades because its surface characteristics are well-understood to allow investigations on flocculation and

  • flocculation and dewatering of kaolin deepdyve

    Flocculation and dewatering of kaolin DeepDyve

    2002-09-01· Read "Flocculation and dewatering of kaolin suspensions in the presence of polyacrylamide and surfactants, International Journal of Mineral Processing" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at

  • evaluation of the flocculation characteristics

    Evaluation of the Flocculation Characteristics

    This manuscript illustrates the feasibility of polyacrylamide grafted xanthan gum/silica based nanocomposite toward its potential application as high performance flocculant for treatment of synthetic effluents and mine wastewater. The flocculation performance of the nanocomposite was systematically evaluated by floc size measurement as well as by traditional turbidity and settling velocity

  • adsorption and flocculation behavior of cationic

    Adsorption and flocculation behavior of cationic

    2003 (English) In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 219, no 03-jan, p. 161-172 Article in journal (Refereed) Published Abstract [en] The adsorption of cationic polyacrylamide and silica nanoparticle systems onto a model surface has been compared with the adsorption and flocculation of a fiber suspension.

  • regularities of flocculation of silica springerlink

    Regularities of flocculation of silica SpringerLink

    2015-10-16· A decrease in the aggregate stability of colloidal silica and conformational contraction of macromolecular coils with the introduction of the electrolyte leads to the formation of polymer—silica floccules. Flocculation of silica particles at macromolecules proceeds via the mechanism of heterocoagulation. When forming the hybrid polymer

  • stability and characterisation of emulsions in the

    Stability and Characterisation of Emulsions in the

    the presence of both surfactant and colloidal particles (hydrophilic silica) has been studied and compared to the stability of systems where only the surfactant or the colloidal particles act as the emulsifier. No attempt was made to stop the emulsions from creaming. Two types of surfactants were selected; those that have the ability to

  • zeta potential and viscosity of colloidal silica

    Zeta potential and viscosity of colloidal silica

    Zeta potential and viscosity of colloidal silica suspensions: Effect of seawater salts, pH, flocculant, and shear rate Cristian P. Romero,a Ricardo I. Jeldres,b Gonzalo

  • rheological properties of silica suspensions

    Rheological Properties of Silica Suspensions

    2000-07-24· The adsorption of polyacrylamide (PAAm) on silica particles and its effect on the rheological properties of the suspensions were studied with a coaxial cylinder type rheometer. The following two unique observations are reported: (1) For suspensions prepared with PAAm solution in glycerin, the apparent viscosity of suspensions is lower than that of the medium.

  • aging and loss of flocculation activity of aqueous

    Aging and loss of flocculation activity of aqueous

    N.J.D. Graham, Orthokinetic flocculation rates for amorphous silica microspheres with cationic polyelectrolytes, Colloids and Surfaces, 3, 1, (61), (1981). Crossref Joachim Klein and Aloys Westerkamp,Peculiarities of polyacrylamide analysis by aqueous GPC,Journal of Polymer Science: Polymer Chemistry Edition,19,3,(707-718),(2003) .

  • coagulation of colloidal solutions and coagulation

    Coagulation Of Colloidal Solutions and Coagulation

    What is Coagulation? Coagulation is a process of accumulation and settling down of particles within a colloid. Get to know about the coagulation of colloidal solutions

  • effect of cationic polyacrylamide on precipitated calcium

    Effect of cationic polyacrylamide on precipitated calcium

    2012-08-20· Read "Effect of cationic polyacrylamide on precipitated calcium carbonate flocculation: Kinetics, charge density and ionic strength, Colloids and Surfaces A: Physicochemical and Engineering Aspects" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • water treatment with levasil colloidal silica nouryon

    Water treatment with Levasil Colloidal Silica Nouryon

    In some water treatment applications, colloidal silica facilitates the flocculation of undesirable materials from process streams. Colloidal silica can also improve the dewatering and retention efficiency of the removed precipitates. Benefits of Levasil Colloidal Silica in water treatment Flocculation Remove unwanted solids from liquid, which are otherwise difficult to filter or settle out

  • flocculation studies on hematite-silica system using

    Flocculation studies on hematite-silica system using

    Flocculation studies on hematite-silica system using polymeric flocculants F F 0 Orumwense• & 1 C Nwachukwub •Mechanical Engineering Department, "f>roduction Engineering Department, University of Benin, P. M. B. 1154, Benin City, Edo State, Ni geria

  • molecular and surface interactions between polymer

    Molecular and Surface Interactions between Polymer

    Solution salinity plays an important role in the interactions between polymer flocculants and solid colloid particles which determine the flocculation performance. In this work, chitosan-graft-polyacrylamide (chi-g-PAM) was synthesized and characterized. The influence of solution salinity (viz., addition of NaCl and CaCl2) on the flocculation of chi-g-PAM on kaolinite suspension and the

  • the flocculation of kaolin with polyacrylamides core

    The flocculation of kaolin with polyacrylamides CORE

    (1965). Role of surface silanol groups in the flocculation of silica suspensions by polyacrylamide. (1970). Sedimentation of a porous sphere. (1962). Settling rates and sediment volumes of flocculated kaolin suspensions. Silberberg A.(1967) Adsorption of flexibile macromolecules. III. Generalized treatment of the isolated macromolecule; the

  • determination of very low concentrations

    Determination of very low concentrations

    A method is described for the analytical determination of low concentrations of polyacrylamide or polyethyleneoxide flocculants in water, in the range 0–10 parts/10 6. It depends on measuring the turbidity produced by mixing the polymer solution with a dilute solution of tannic acid in

  • interaction and adsorption of hydrophobically modified

    Interaction and Adsorption of Hydrophobically Modified

    The adsorption of polymers affects the cost and oil recovery in oil reservoir exploitation and the flocculation effect in the treatment of oil sand tailings. The adhesion and adsorption of a hydrophobically modified polyacrylamide (HMPAM), i.e., P(AM-NaAA-C 16 DMAAC), on silica and asphaltene were investigated using surface force measurements, thermodynamic analysis and quartz crystal

  • aggregation of colloidal silica by n-alkyl sulfates

    Aggregation of Colloidal Silica by n-Alkyl Sulfates

    Flocculation of colloidal silica with polyacrylamide and the effect of dodecylamine and aluminium chloride pre-conditioning. Minerals Engineering 1998, 11 (5),463-467. DOI: 10.1016/S0892-6875(98)00026-0. Gerhard Lagaly, Oliver Schulz, Ralf Zimehl.

  • molecular and surface interactions between polymer

    Molecular and Surface Interactions between Polymer

    Solution salinity plays an important role in the interactions between polymer flocculants and solid colloid particles which determine the flocculation performance. In this work, chitosan-graft-polyacrylamide (chi-g-PAM) was synthesized and characterized. The influence of solution salinity (viz., addition of NaCl and CaCl2) on the flocculation of chi-g-PAM on kaolinite suspension and the

  • regularities of associate formation between springerlink

    Regularities of associate formation between SpringerLink

    2012-04-17· It is shown that water-soluble acrylic polymers can increase the aggregative stability of colloidal silica even in the presence of an electrolyte. Assumptions are made on the possibility of heterocoagulation of silica nanoparticles on macromolecular coils of acrylamide copolymers at the initial stages of the sol-gel process.

  • beverage clarification with colloidal silica nouryon

    Beverage clarification with Colloidal Silica Nouryon

    In beverage clarification Levasil Colloidal Silica is used as a functional-processing aid for removing undesirable components from liquids At Levasil Colloidal Silica we contribute to your success with innovations in silica chemistry. Discover our broad product portfolio and reliable supply.

  • synthesis of cationic polyacrylamide/silica

    Synthesis of cationic polyacrylamide/silica

    2012-10-05· Read "Synthesis of cationic polyacrylamide/silica nanocomposites from inverse emulsion polymerization and their flocculation property for papermaking, Colloids and Surfaces A: Physicochemical and Engineering Aspects" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • adsorption kinetics of cationic polyacrylamides

    Adsorption kinetics of cationic polyacrylamides

    The adsorption of cationic polyacrylamide (C-PAM) and silica nanoparticles onto a model surface of silicon oxide was compared with the adsorption of C-PAM to fibres and their influence on flocculation of a fibre suspension. An increase in ionic strength affects the polyelectrolyte adsorption in different ways for these two systems. With the silica surface, an increase in the ionic strength

  • water treatment precipating silica degremont®

    water treatment precipating silica Degremont®

    This colloidal silica is not ionised and, therefore, is not properly eliminated by traditional systems used in the treatment of boiler water (clarification + ion exchange) (see chapter treatment and conditioning of industrial water) and poses severe problems (scaling, vapor quality). Consequently, supplementary methods have been developed:

  • paper & packaging with levasil colloidal silica nouryon

    Paper & Packaging with Levasil Colloidal Silica Nouryon

    Levasil Colloidal Silica is a key component in the paper manufacturing industry. It is used to enhance the frictional and printing properties of board stock. Images printed on paper treated with colloidal silica are crisper and clearer. Finally, colloidal silica is a common retention and drainage aid used during paper manufacturing.

  • flocculation studied with the esa technique, journal

    Flocculation Studied with the ESA Technique, Journal

    Flocculation Studied with the ESA Technique Flocculation Studied with the ESA Technique Walldal, Charlotte 1999-09-01 00:00:00 The aim of this paper is to show that the ESA (electrokinetic sonic amplitude) technique can be used to study the flocculation between cationic polyelectrolytes and negatively charged silica particles. The ESA signal was measured when cationic polyacrylamide

  • coagulation and flocculation for raw water ecolab

    Coagulation and Flocculation for Raw Water Ecolab

    Coagulation and flocculation involves the removal of suspended solids and turbidity from water to prepare it for use or for further treatment. This step typically uses the difference in density between the water and the suspended material for separation. The process of coagulation, along with flocculation, is used whenever the natural settling

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