Effect of bubble sizes on oxygen transfer efficiency of nano …
According to the two-film adsorption theory ... To evaluate the effect of bubble size on the efficiency of enhancing DO in water, MBs solution and NBs solution were introduced into water samples. ... Yan S-L, Wang X-Q, Zhu L-T, Zhang X-B, Luo Z-H (2023) Mechanisms and modeling of bubble dynamic behaviors and mass transfer …
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ability of aqueous solutions: Role of surfactant type …
To determine the main characteristics of the dynamic adsorption layer, formed in the process of bubble generation, we assume that the surfactant adsorption Γ(t) can be determined from the measured dynamic surface tension σ(t) using Eq. (5). Most of the studied surfactant concentrations are around and above the CMC.
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Motor oil removal from water by continuous froth flotation …
This is because the surfactant adsorption on the air bubble surface reduces the surface tension at the air–water interface, which would consequently reduce the holding forces during bubble formation, as well as decreases the coalescence rate of the air bubbles, as explained before. ... Effect of the bubble size on the dynamic adsorption …
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Bubble detachment by diffusion-controlled surfactant adsorption
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. Air bubbles of known volume (scaled bubble dimension λ =0.8, 1.0, 1.5) are maintained in tubes inclined at 25°, 45°, 65°, or 90°. Triton X-100 is infused into the bulk flow to achieve a ...
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Effect of Adsorption Dynamics on Hydrodynamic
In this paper, the effects of Langmuir number and Peclet number on the hydrodynamic characteristics of a bubble contaminated by surfactants are numerically studied at bubble Reynolds number Re = 100, 150 and 200. It is discovered that the hydrodynamics of a bubble with excessive pollution interface can lose two-dimensional …
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Toward Enhanced Aerosol Particle Adsorption in Never‐Bursting Bubble
The aerosol particle adsorption can be monitored by the transparency of bubble, which was analyzed using the MGV of the bubble photos (Figure 6c). To elucidate the effect of acoustic levitation on particle adsorption, we compared the temporal MGV of an acoustically levitated bubble and a traditional bubble without sound field.
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Dynamic adsorption layer formation and time of bubble …
The paper deals with the effect of the motion-induced dynamic adsorption layer profile on the time-scale of bubble attachment to a mica surface in solutions of cationic surfactants, n-alkyltrimethylammonium bromides (C n TABr). In distilled water both the mica and bubble surfaces are negatively charged and the wetting film is stable.
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A microfluidic study of bubble formation and …
Emulsifier adsorption Dynamic surface tension Bubble formation ... our microfluidic study highlights the dynamic effects in the presence of SDS and proteins during bubble for- ... bubble size with ...
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Effect of scale dependent dynamic properties on bubble size
The adsorption of the surfactants triggers chain reactions acting along different size-scales: it diminishes the tension at the air-liquid interface and increases its surface elasticity (micro ...
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Dynamic behavior of near-surface nanobubbles formation
The formation and development of nanobubbles near the solid surface were studied. •. The effects of bubble size and bubble spacing on bubble coalescence were revealed. •. The influence of wettability on the formation and development of surface nanobubbles was introduced. In this work, the molecular dynamics simulation was …
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Dynamic adsorption of water soluble crude oil components …
Environmental science & technology. 2013. TLDR. The interactions between crude oil droplets and air bubbles were studied by the droplet-bubble micromanipulator technique, and it was suggested that adsorption of dissolved hydrocarbons at air bubble surfaces may increase the potential energy barrier in the thin liquid film.
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Effect of dynamic adsorption layer over colliding bubble …
It was found that degrees of initial bubble adsorption coverage (which values were calculated according to existing adsorption models), has profound influence on kinetics of the dynamic adsorption ...
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Dynamic behaviour of the CO2 bubble in a bubble column …
Effect of capillary orifice size on CO 2 bubble behaviour. In this section, the effect of capillary orifice size on bubble dynamic behaviour was studied. The results are shown in Figs. 8 and 9. Figure 8a presents variations in bubble diameter with time before detachment. The larger capillary orifice sizes resulted in a higher bubble growth rate.
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A Theoretical Study on Surfactant Adsorption Kinetics: Effect of 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 …
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Dynamic froth stability: Particle size, airflow rate and …
In order to determine the effect of particle size on froth stability, a range of samples were prepared using by grinding for different lengths of time (milling times); the four different milling times used were 40, 55, 80 and 120 min (Table 1).Laser particle size analyses of each sample were performed after the milling operation.
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Formation and influence of the dynamic adsorption layer …
The adsorption coverage over surface of the detaching bubble is uniform and its magnitude is a function of the adsorption kinetics and rate of the bubble growth. Viscous drag exerted by continuous medium on surface of the rising bubble induces uneven distribution of the adsorption coverage and dynamic structure of the …
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Experimental Study of the Effect of the Surfactant on the Single Bubble
The effect of surface contamination on the bubble velocity is analyzed. Based on the stagnant cap model, a mathematical model coupling the surfactant adsorption and desorption on the bubble surface and the dynamic bubble motion in stagnant solutions is further proposed.
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Coalescence of surface bubbles: The crucial role of motion …
The paper presents the experimental studies on influence of degree of initial adsorption coverage and structure of the dynamic adsorption layer over a rising bubble on stability of single ...
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Journal of Colloid and Interface Science
Effects of dynamic adsorption on bubble formation and coalescence in partitioned-EDGE devicesq ... the bubble size and the bubble formation frequency – though they are interrelated [1]. On the ...
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Effects of dynamic adsorption on bubble formation and …
DOI: 10.1016/j.jcis.2021.06.014 Corpus ID: 235450502; Effects of dynamic adsorption on bubble formation and coalescence in partitioned-EDGE devices. @article{Deng2021EffectsOD, title={Effects of dynamic adsorption on bubble formation and coalescence in partitioned-EDGE devices.}, author={Boxin Deng and Karin …
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Effect of Particle Size and Hydrophobicity on Bubble …
The slurry phase, phase, and slurry– phase interfaces are the typical locations for bubble-particle detachment, and significant advancements have been achieved in the detachment theory of the slurry phase and phase. However, the microscopic detachment mechanism of particles at the slurry– phase interface is still …
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Study of Hexane Adsorption in Nanoporous MCM-41 Silica
Effect of Pore Structure in Mesoporous Silicas on VOC Dynamic Adsorption/Desorption Performance. Langmuir 2007, 23 (6), 3095-3102. DOI: 10.1021/la062616t. ... Molecular simulation of the pore size distribution effect on phase behavior of methane confined in nanopores. ... Effect of confinement on the bubble …
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Study on dynamic adsorption characteristics of gangue to …
From the mesoscopic void scale, the effects of gangue particle size gradation, inflow velocity and ion concentration on the flow field characteristics, ion migration and dynamic adsorption characteristics of gangue in the leaching column were explored, and the purification mechanism of the broken gangue to heavy metals in mine water was …
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Synthesis and properties of comb-like and linear polymers: Effects …
In this work, four types of comb-like dispersants and one linear dispersant were synthesized to explore the effect of dispersant structure on the bubble structure in water solution and mortar system for the first time. Dispersants were modified with different adsorption groups (i.e., carboxylic acid, phosphate ester, and sulfonic groups).
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Dynamic interfacial tension of surfactant solutions
The effect of adsorption isotherms on the adsorption kinetics was shown much later in ... The theoretical description of the dynamic adsorption on the bubble interface follows is governed by Fick's law (25). ... Download full-size image; Fig. 10. Dynamic adsorption of C 12 EO 5 (dashed lines) and C 14 EO 8 ...
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CFD simulation of bubble in flow field: Investigation of dynamic …
The effects of the adsorption and desorption of surfactants on the shear-induced lift force exerted on the surface of rising bubbles have also been studied [34]. ... Formation and influence of the dynamic adsorption layer on kinetics of the rising bubble collisions with solution/gas and solution/solid interfaces ... bubble size, and shape [36 ...
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A Theoretical Study on Surfactant Adsorption Kinetics: …
a diffusion-controlled adsorption process, bubble shape and needle size are two major factors affecting the DST. The existence of a needle accelerates the bulk diffusion for a small bubble; however, the shape of a large pendant bubble decelerates the bulk diffusion. An example using this method on the DST data of C12E4 is illustrated at the end of
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Formation and influence of the dynamic adsorption layer
The adsorption of surfactant molecules leads to the formation of dynamic adsorption layers (DAL) at the bubble surface and to a reduction of ... the particle size range, with greatest effect on ...
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The dynamic adsorption affinity of ligands is a surrogate for …
To account for the finite-size effects, several important correction schemes, e.g, the potential-alignment correction (qΔV), were considered in our defect calculations 25,26.
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Nanobubble–Nanoparticle Interactions in Bulk Solutions
Nanobubbles effect on heavy metal ions adsorption by activated carbon. Chemical Engineering ... Shahbazi, Arash Tehranchi. New Approach to Quartz Coarse Particles Flotation Using Nanobubbles, with Emphasis on the Bubble Size Distribution. International Journal of ... Dynamic behavior of two neighboring nanobubbles induced by …
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