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Transport transformation and removal of iron in aqueous environments is primarily controlled by ferrous iron oxidation followed by aggregation and sedimentation of the resultant hydrous ferric oxides The latter mechanisms are particularly important for passive iron removal in mine water treatment systems yet the interrelation and underlying kinetics are poorly understood In this study
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Effects of exopolymers on particle size distributions of 07 06 2024 Second the EPS solution was and the Cilas data obtained in this study for a polydisperse particle standard with a nomical size of 10 100 µm In summary the effect of EPS and other organic matter on the PSD kinetics and sediment
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polydisperse distribution will occur The very fine droplets do not sediment with the majority of droplets leading to a secondary sedimentation Second sedimentation cannot be evaluated by optical technique in most case Ultrasonic scanning is a technique to overcome the mentioned obstacles The major advantage of this technology is that it is
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Applications of polydisperse sedimentation models Institut für EN English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian česk
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allows extending quantitative measurements of sedimentation profiles to a wide class of colloidal systems These concepts and methods are tested on a suspension of monodisperse hard and sticky spheres 2 Sedimentation kinetics Let us first recall some basic aspects of gravity settling for interacting colloids Consider a dispersion of spherical
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Many hypotheses concerning polydisperse sedimentation have been proposed and documented in literature but most of them have yet to be confirmed by ample experimental evidences that are unavailable at present because of the tremendous difficulty in performing controlled experiments with polydisperse suspensions
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Sedimentation kinetics of polydisperse second phase inclusions in molten selenium Authors first second and last of 6 Yu P Kirillov G A Voronin M F Churbanov Content type OriginalPaper Published 30 March 2024 Article 449 Sorbents based on modified polysiloxanes Authors first second and last of 9
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A mathematical model of the evaporation of a polydisperse ensemble of drops with allowance for a nonlinear diffusion term in the kinetic equation for the population density distribution function is developed The kinetics of heat transfer between phases is theoretically studied An analytical solution to the integro differential
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Second the slope of the sedimentation curves in the semi log scale in the sedimentation I region of the surface and sedimentation kinetics as a function of initial particle concentrations are not reported polydisperse particles fall into those two extreme regions However in region 2 the intermediate case
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In this paper we present measurements of the crystallization kinetics of binary mixtures of two different sized hard sphere particles The growth of the Bragg reflections over time were analyzed to yield the crystallite scattering vector the total amount of crystal and the average linear crystal s …
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Consider a dispersion of spherical ρ particles with radius R and material density p sedimenting For what follows it is also useful noticing that g is also along the z axis taken antiparallel to g in a solvent of density equal to the ratio D0/vS between the single particle diffusionρs and viscosity η
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In the evaluation of sedimentation equilibrium data for polydisperse nonideal solutions extrapolation procedures are required for the determination of the true solute weight average molecular weight and of the light scattering second virial coefficient
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The settling of a polydisperse suspension with a continuous particle size distribution PSD can be modeled by an equation of the generalized kinetic theory which represents the limit case of a
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Kirillov Voronin Shiryaev et al Sedimentation kinetics of polydisperse second phase inclusions in molten selenium Inorg Mater 47 449 454 2024 https ////S0020168511030149 Download citation Received 11 May 2024 Published 30 March 2024 Issue Date April 2024 DOI https ////S0020168511030149
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Sedimentation kinetics monitor inproceedings{Kamugasha2001SedimentationKM title={Sedimentation kinetics monitor} author={D Kamugasha and Haroun Mahgerefteh} year={2024} } D Kamugasha H Mahgerefteh Published 31 December 2024 Materials Science View via Publisher Save to Library Save Create Alert Alert
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Numerous engineering applications involve the sedimentation of small solid particles dispersed in a viscous fluid In polydisperse suspensions the particles belong to several species that differ in size density or both and segregate and create areas of different composition
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Article Sedimentation profiles of polydisperse fluids August 2024 Journal of Physics Condensed Matter 15 32 5417
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Measuring the concentration profiles induced by gravity settling is known to be an efficient route to obtain the equation of state of a colloidal suspension to inspect the fine details of the phase diagram and to provide clues on the nature of
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free unhindered sedimentation by the accumulation of precipitate mass on the cup of a BT 500 torsion balance in a cylinder with a working volume of 400 cm 3 It was shown in tentative experiments that the sedimentation kinetics was controlled most reliably and conveniently if to the concentration of a dispersed phase is equal to R
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Sedimentation kinetics of polydisperse second phase inclusions in molten selenium Authors Yu P Kirillov Russian Academy of Sciences G A Voronin V S Shiryaev Liudmila Ketkova
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Comparative analysis shows that for hampered embedding of particles in the sediment structure K < 1 intense stirring Bo > 1 leads to a much stronger concentration of particles near their sedimentation surface the local concentration of particles during the entire process being higher in the case of displacement of the free boundary
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Sedimentation of a particle is the result of the ratio between the gravity force exerted on the particle and the drag force that opposes the movement of the particle Thus in stable environmental conditions the particle reaches a terminal sedimentation velocity
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In this paper we present measurements of the crystallization kinetics of binary mixtures of two different sized hard sphere particles The growth of the Bragg reflections over time were
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focused on sedimentation from suspensions of one or two particle sizes rarely on truly polydisperse suspensions of particles and their deposits Hindered settling laws for poly disperse suspensions [see Masliyah 1979 Batchelor 1982 Davis and Acrivos 1985] have been derived to take into account the effect of particle concentration on the
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The sedimentation of microscopic particles in a fluid suspension is a problem of long standing interest in fluid dynamics For particles of uniform size and density the behaviour of the suspension is relatively well understood and can be characterized by the average settling velocity as a function of volume fraction u $
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Determination of molecular weight and second virial coefficient of polydisperse nonideal polymer solutions by the sedimentation equilibrium method Solanaceae Cultured Cells Isolation Physicochemical Properties and Inhibition Kinetics European Journal of Biochemistry 1975 55 1 Sedimentation Equilibrium of High Charge Density
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Sedimentation wherein particles fall under the action of gravity through a fluid in which they are suspended is commonly used in the chemical and petroleum industries as a way of separating… 343 Highly Influential View 10 excerpts references background and methods The rate of coagulation of a dilute polydisperse system of sedimenting spheres
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Sedimentation in a dilute polydisperse system of interacting spheres Part 1 General theory Volume 119 The second step is to determine p ij r from a differential equation of Fokker Planck type representing the effects of relative motion of the two particles due to gravity the interparticle force and Brownian diffusion The solution
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The coagulation and sedimentation of particles is central to many environmental and industrial processes Kinetic descriptions of this process can be divided into two approaches A second approach involves the use of simple rate expressions for the loss of particle mass with time where the order of the reaction is determined by the
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The behavior of polydisperse second phase inclusions in molten selenium during settling is modeled using solid carbon particles as an example A theoretical limit of the particle concentration in the surface layer of the melt is evaluated as a function of particle size and the particle concentration is determined as a function of time melt
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