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Effect Of The Bubble Size On The Dynamic Adsorption Of

  • Role of Subsurface Particulates on the Dynamic Adsorption ...

    In this study, the adsorption behavior of DPPC at the air/water interface was investigated with tensiometry, infrared reflection−absorption spectroscopy (IRRAS), and ellipsometry. Two different preparation protocols were used to vary the size and microstructure of dispersed particles, and their effects were assessed. Dec 04, 2007· A theoretical study on surfactant adsorption kinetics: effect of bubble shape on dynamic surface tension. Yang MW(1), Wei HH, Lin SY. Author information: (1)Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan.

  • Dynamic adsorption of beta-casein at the gas ... - DeepDyve

    Mar 01, 2006· Dynamic adsorption of beta-casein at the gas–liquid interface Dynamic adsorption of beta-casein at the gas–liquid interface Phan, C.M.; Nguyen, A.V.; Evans, G.M. 2006-03-01 00:00:00 The dynamic adsorption of beta-casein onto the air–water interface was experimentally studied in terms of the dynamic surface tension using the pendant bubble method. The Effect of Dynamic Surface Tension on Oxygen Transfer Coefficient in Fine Bubble Aeration System by Tai L. Huo Doctor of Philosophy in Civil Engineering University of California, Los Angeles, 1998 Professor Michael K. Stenstrom, Chair A bench-scale bubble aeration device was built and applied to the dynamic surface

  • Dynamic adsorption of water soluble crude oil components ...

    Sep 20, 2013· Previously, we have reported on how the ionic composition of the water influences the adsorption of water soluble crude oil components onto air–water interfaces (Eftekhardadkhah and Øye, submitted for publication). In this paper the focus is on the dynamic adsorption of water soluble components in synthetic produced water prepared from nine ... Oct 20, 2014· A new experimental protocol for flow field effects on dynamic adsorption layer. • Significant effects on a fresh air bubble in surfactants solution is observed. • Negligible effects of the flow field on the surfactant distribution for pre-aged bubbles. • It can be used for better understanding of rising bubbles in surfactant solutions.

  • Effect of the bubble size on the dynamic adsorption of ...

    Apr 01, 2006· Read "Effect of the bubble size on the dynamic adsorption of frothers and collectors in flotation, International Journal of Mineral Processing" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Oct 09, 2008· Dynamic adsorption properties of n-alkyl glucopyranosides determine their ability to inhibit cytolysis mediated by acoustic cavitation ..., 18, 21, 28, 34 since a longer time is required for these surfactants to attain the equilibrium surface excess. 38 This dynamic adsorption effect is ... Given the current data and the above description of ...

  • Dynamic adsorption of beta-casein at the gas–liquid ...

    The dynamic adsorption was determined in terms of the dynamic surface tension using the pedant bubble method (Miller et al., 1993) with a fully computer-controlled apparatus OCA 20 from DataPhysics (Germany).An air bubble was formed at the top of the needle with outside diameter of 1.26 mm by the use of a micro-syringe and a syringe pump. This is a repository copy of Evolution of bubble size distribution in particle stabilised bubble dispersions: Competition between particle adsorption and dissolution kinetics. White Rose Research Online URL for this paper:

  • A theoretical study on surfactant adsorption kinetics ...

    Dec 04, 2007· A theoretical study on surfactant adsorption kinetics: effect of bubble shape on dynamic surface tension. Yang MW(1), Wei HH, Lin SY. Author information: (1)Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan. concentrations of frother (5-10 ppm) already decreases the bubble size and prevents coalescence, even if surface tension is not decreased signi¿ cantly. The bubble formation and behaviour in À otation is most probably governed by the sub-millisecond adsorption phenomena taking place at air/liquid interfaces.

  • Micellar dissolution and diffusion effects on adsorption ...

    Micellar Dissolution and Diffusion Effects on Adsorption Dynamics of Surfactants Ying-Chih Liao, Osman A. Basaran, and Elias I. Franses School of Chemical Engineering, Purdue University, West Lafayette, IN 47907 A one-dimensional (1-D) model for the diffusion-controlled dynamic adsorption and surface tension in micellar solutions of nonionic surfactants is de®eloped and tested with ... The phenomenon of hysteresis in ferromagnetic materials is the result of two effects: rotation of magnetization and changes in size or number of magnetic domains.In general, the magnetization varies (in direction but not magnitude) across a magnet, but in sufficiently small magnets, it does not.

  • Influence of the adsorbent particle size distribution on ...

    Influence of the adsorbent particle size distribution on the adsorption parameters from stirred tank dynamic experiments Proceedings of European Congress of Chemical Engineering (ECCE-6) Copenhagen, 16-20 September 2007 Influence of the adsorbent particle size distribution on the adsorption parameters from stirred tank dynamic experiments The adsorption of C12E8 onto a clean air−water interface is studied by using a video-enhanced pendant bubble tensiometry. The controlling mechanism for mass transfer changes as a function of bulk concentration; it shifts from diffusion control at dilute concentration to mixed diffusion−kinetic control at more elevated bulk concentration.

  • Dynamic Studies of Soluble Adsorption Layers | Request PDF

    Dynamic Studies of Soluble Adsorption Layers ... of the surface by a bubble-pressure method. The effect of salts can be explained on the assumption that adsorption at the surface is controlled by ... is the surfactant at the interface (e.g., the air bubble surrounded by water) with the polar or charge end in the water and the non polar end protruding into the bubble. The net effect is to reduce oxygen transfer in the area around the bubble by reducing molecular diffusion of oxygen. The time required for adsorption varies with the surfactant ...

  • Effects of Surfactants on High Regularity of 3D Porous ...

    Three-dimensional porous nickel (3D-PN) film with large specific surface area and high porosity has been successfully prepared by hydrogen bubble dynamic template (HBDT) method. This work presents the effects of PEG 10000 and 1,4-butynediol as new additive combination on surface morphology of the PN film. Meanwhile, the application of 3D-PN in Zn2+ adsorption was preliminarily investigated in ... Interfacial tension is an important physical property affecting the droplet formation process in microfluidic devices. This work presents the variation of dynamic interfacial tension caused by slow adsorption of surfactant, as well as its influence on the liquid/liquid microdispersion process in a T-shaped microchannel. Using hexane/water−Tween 20 as the working system, it was observed that ...

  • A Theoretical Study on Surfactant Adsorption Kinetics ...

    A Theoretical Study on Surfactant Adsorption Kinetics: Effect of Bubble Shape on Dynamic Surface Tension Article in Langmuir 23(25):12606-16 · January 2008 with 44 Reads How we measure 'reads' The effect of these different pore size characteristics on the adsorption kinetics, obtained by fitting the data to the linear driving force (LDF) model, is that the resulting adsorption rate constants are higher across much of the relative pressure range (p/p s) studied for the resin based carbon compared to the nutshell material ...

  • CO2-Soluble Ionic Surfactants and CO2 Foams for High ...

    The goal of this study is to identify CO 2-soluble ionic surfactants that stabilize C/W foams at elevated temperatures up to 120 °C in the presence of a high salinity brine using aqueous phase stability, static and dynamic adsorption, CO 2 solubility, interfacial tension, foam bubble size, and foam viscosity measurements. An anionic sulfonate ... Request PDF on ResearchGate | " Bubble-on-demand " generator with precise adsorption time control | The paper presents the principles of our new single bubble generator, which allows a precise ...

  • Effect of confinement on the bubble points of hydrocarbons ...

    We find that the bubble point is dramatically affected by pore diameter: at 38.1 nm the confinement effect is insignificant, but at 4.3 nm two distinct bubble points appear, suggesting two distinct populations of evaporating fluid. Deviations are as great as ±15 K for both peaks relative to the bulk bubble … A planar or spherical fluid−liquid interface was commonly assumed on studying the surfactant adsorption kinetics for a pendant bubble in surfactant solutions. However, the shape of a pendant bubble deviates from a sphere unless the bubble's capillary constant is close to zero. Up to date, the literature has no report about the shape effect on the relaxation of surface tension due to the ...

  • Effect of the bubble size on the dynamic adsorption of ...

    This paper presents an analysis on the dynamic adsorption of frothers and collectors onto air bubbles in flotation. The analysis was carried out using the theory on the surfactant transfer by diffusion and adsorption. The bubble size was considered when solving the diffusion equation for the dynamic … Composition and Dynamic Adsorption of Crude Oil Components Dissolved in Synthetic Produced Water at Different pH Values Article in Industrial & Engineering Chemistry Research 55(11) · …

  • Nanobubbles (ultrafine bubbles)

    The rationale for bulk nanobubble stability. A review of some hypotheises for the stability of bulk nanobubbles has been produced [].The likely reason for the long-lived presence of nanobubbles (first described on this website in 2007) is that the nanobubble gas/liquid interface has a negative charge [3424, 3473, 3531] that introduces an opposing force to the surface tension, so slowing or ... by using a low cost natural adsorbent perlite. In the batch mode studies, the dynamic behaviour of the adsorption was investigated on the effect of initial metal ion concentration, temperature, adsorbent dosage and pH. The thermodynamic parameters were also evaluated from the adsorption measurements. The

  • A Theoretical Study on Surfactant Adsorption Kinetics ...

    A Theoretical Study on Surfactant Adsorption Kinetics: Effect of Bubble Shape on Dynamic Surface Tension Article in Langmuir 23(25):12606-16 · January 2008 … Dynamic Studies of Soluble Adsorption Layers ... of the surface by a bubble-pressure method. The effect of salts can be explained on the assumption that adsorption at the surface is controlled by ...

  • The dynamic adsorption of Xe on a fixed bed adsorber at 77 K

    The dynamic adsorption of Xe on a fixed bed adsorber at 77 K Bin Long 1,2,1), Jun- Li Li 1, Qun- Shu Wang 2, Shu- Juan Feng 2, Guo- Qing Zhou 2, Tian- Cheng Feng 2, Yan- Jie Tian 2, Huai- Cheng Ma 2 1Key Laboratory of Particle and Radiation Imaging of Ministry of Education, Department of Engineering Physics, Tsinghua University, Beijing 100084, China 2Northwest Institute of Nuclear Technology ... Oct 23, 2003· Bubble detachment by diffusion-controlled surfactant adsorption Bubble detachment by diffusion-controlled surfactant adsorption Eckmann, David M.; Cavanagh, Daniel P. 2003-10-23 00:00:00 The effect of the diffusion-controlled adsorption of the surfactant Triton X-100 on detachment of gas bubbles adherent to the wall in pipe flow is studied.

  • Effect of Substrate Strain on Adsorption | Science

    Direct evidence for the effect of local strain at a surface on the bonding strength for adsorbates is presented. Scanning tunneling microscopy revealed that adsorbed oxygen atoms on Ru(0001) surfaces are located preferentially on top of nanometer-size protrusions above subsurface argon bubbles, where tensile strain prevails, and are depleted around their rim in regions of compression, relative ... Effect of the bubble size on the dynamic adsorption of frothers and collectors in flotation Article in International Journal of Mineral Processing 79(1):18-26 · April 2006 with 58 Reads

  • Dynamic Surface Tension Effects on Oxygen Transfer in ...

    Dynamic Surface Tension Effects on Oxygen Transfer in ... 12 Bubble Life vs. Flow 69 13 Effect of Repeated Aeration Runs 73 14 Effect of Antifoam Agents 75 ... it especially neglects the effect of surfactant adsorption at the interface because of the steady-state assumption. It is therefore more desirable to incorporate the This article presents the dynamic behaviour of a single effect two bed adsorption chiller employing adsorbent beds with various layers of loose grain configurations and silica gel particle sizes, which is based on the experimentally confirmed adsorption isotherms and kinetics data.

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