Suspended Particles Transport and Deposition in Saturated Granular Porous Medium: Particle Size Effects

Bennacer, Lyacine; Ahfir, Nasre-Dine; Bouanani, Abderrazak; Alem, Abdellah; Wang, Huaqing

doi:10.1007/s11242-013-0220-4

Cited by 55 publications

(33 citation statements)

References 29 publications

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“…Thus, some colloids are getting slowed down having to pass through small pore spaces, where other colloids are managing to stay in fast flow paths. This result is in agreement with the work published by Jourak et al [2013] who studied theoretically the effects of particle-size distribution on the longitudinal dispersion coefficient in models of packed columns, and the work published by Bennacer et al [2013] who investigated experimentally the transport and deposition of suspended particles with different size distributions in water-saturated porous media. However, Keller et al [2004], Vasiliadou and Chrysikopoulos [2011], and Syngouna and Chrysikopoulos [2011] reported that a L decreases with increasing d p .…”

Section: 1002/2014wr016094supporting

confidence: 92%

Colloid particle size‐dependent dispersivity

Chrysikopoulos,

Katzourakis

2015

Water Resources Research

130

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Laboratory and field studies have demonstrated that dispersion coefficients evaluated by fitting advection-dispersion transport models to nonreactive tracer breakthrough curves do not adequately describe colloid transport under the same flow field conditions. Here an extensive laboratory study was undertaken to assess whether the dispersivity, which traditionally has been considered to be a property of the porous medium, is dependent on colloid particle size and interstitial velocity. A total of 48 colloid transport experiments were performed in columns packed with glass beads under chemically unfavorable colloid attachment conditions. Nine different colloid diameters and various flow velocities were examined. The breakthrough curves were successfully simulated with a mathematical model describing colloid transport in homogeneous, water-saturated porous media. The experimental data set collected in this study demonstrated that the dispersivity is positively correlated with colloid particle size, and increases with increasing velocity. The dispersivity values determined in this laboratory study were compared with 380 dispersivity values from earlier laboratory and field-scale solute, colloid and biocolloid transport studies published in the literature.

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Section: 1002/2014wr016094supporting

confidence: 92%

Colloid particle size‐dependent dispersivity

Chrysikopoulos,

Katzourakis

2015

Water Resources Research

130

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“…The size exclusion effect makes the particle plume have a lower effective dispersion coefficient than DT because of the preferential advection of particles along the central streamline (Ahfir et al, ; Auset & Keller, ; James & Chrysikopoulos, ). Bennacer et al () showed that the transport of SP was less rapid than that of DT whatever the flow velocity and the size distribution of the injected SP, because of the detours of the transport paths of SP. This can be attributed to the complicated coupling effects such as the electrostatic force, London–van der Waals force, hydrodynamic force, gravity, particle concentration, and the size exclusion effect for different SPs and pore structures of the matrix.…”

Section: Resultsmentioning

confidence: 99%

“…The classical solution based on the convection‐dispersion model (Ahfir et al, ; Bennacer et al, ; Chen & Bai, ; Massei et al, ) is often used to describe the seepage transport of SPs, in which the influence of the release effect on the deposition kinetics is not considered. However, this effect is prominent in the case of long‐time injection.…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…Equation can be used to simulate the breakthrough curves (BTCs) of the column tests for the so‐called “pulse injection”, where the injection duration is sufficiently short to be considered instantaneous (Bennacer et al, ; Chen & Bai, ). Actually, Equation can be degenerated to the classical solution based on the convection‐dispersion model by letting k r = 0 and t ′ = 0.…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…The particle size between 1 and 50 μm can be considered as a transition from the colloidal particles to the SPs (Bradford et al, ; Foppen et al, ; Sen & Khilar, ), and the seepage migration in this range is affected by multiple physical mechanisms, such as the electrostatic force, molecular diffusion, hydrodynamic force, and gravity. Generally, the finite size of a colloid particle excludes it from the slowest moving portion of the parabolic velocity profile within a fracture or a pore throat; thus, the effective particle velocity is increased, while the overall particle dispersion is reduced, but with a tendency to increase with increasing particle size (Bennacer et al, ; James & Chrysikopoulos, ). However, inconsistent results have also been reported (Keller et al, ; Vasiliadou & Chrysikopoulos, ).…”

Section: Introductionmentioning

confidence: 99%

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The effect of temperature on the seepage transport of suspended particles in a porous medium

Bai

Long

Rao

et al. 2016

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The main purpose of this study is to experimentally investigate the effect of temperature on the seepage transport of suspended particles (SP) with a median diameter of 10–47 μm in a porous medium for various seepage velocities. The results show that the rise of temperature accelerates the irregular movements of SPs in the porous medium and reduces their migration velocity. As a result, the pore volume corresponding to the peak value of the breakthrough curves is apparently delayed, and the peak value in the effluent is decreased. The migration velocity of SPs decreases with increasing particle size, regardless of the Darcy velocity and temperature. The longitudinal dispersivity of SPs decreases slightly with increasing temperature and then remains almost unchanged. Larger particles experience more irregular movements induced by the limit of pore size, which leads to a larger dispersivity. The deposition coefficient increases with increasing temperature, especially in the case of a high seepage velocity, and then tends to be stable. The deposition coefficient for large‐sized particles is higher than that for small‐sized particles, which can be attributed to the restriction of large‐sized particles by the narrow pores in the porous medium. The recovery rate decreases slightly with the increase of temperature until a critical value is reached, beyond which it remains almost unchanged. In summary, temperature is a significant factor affecting the transport and deposition of SPs in the porous medium, and the transport parameters such as particle velocity, dispersivity, and deposition coefficient.

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Modelling of colloidal particle and heavy metal transfer behaviours during seawater intrusion and refreshing processes

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The proper management of coastal aquifers commonly requires an understanding of regional mass flow and complete seawater-freshwater circulation. In this study, time series observations of seawater intrusion and refreshing were conducted using a column experiment based on natural flow conditions in coastal groundwater and a sampled medium from a coastal sandy aquifer without chemical treatment. Ranges of hydrodynamic and hydrochemical variables were tested and

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Suspended Particles Transport and Deposition in Saturated Granular Porous Medium: Particle Size Effects

Cited by 55 publications

References 29 publications

Colloid particle size‐dependent dispersivity

Colloid particle size‐dependent dispersivity

The effect of temperature on the seepage transport of suspended particles in a porous medium

Modelling of colloidal particle and heavy metal transfer behaviours during seawater intrusion and refreshing processes

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