Deposition and re-entrainment of model colloids in saturated consolidated porous media: Experimental study

Canseco, Vladimir; Djehiche, Abdelkader; Bertin, Henri; Omari, Abdelaziz

doi:10.1016/j.colsurfa.2009.09.033

Cited by 17 publications

(22 citation statements)

References 28 publications

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“…Each BTC contains three segments corresponding to the three experimental phases. Recent studies (Franchi and O'Melia, 2003; Hahn and O'Melia, 2004; Hahn et al, 2004; Redman et al, 2004; Shen et al, 2007, 2008; Canseco et al, 2009; Torkzaban et al, 2010; Johnson et al, 2010) have obtained evidence supporting the hypothesis that the colloids measured in phase 3 were those deposited at secondary minima in phase 1 and released upon elution with DI water, which eliminates the secondary minima of DLVO interaction energy curves. Microscopic observation (Liu et al, 2009) has further verified this hypothesis.…”

Section: Resultsmentioning

confidence: 80%

“…6), the values of M 3 were found to be consistently larger in sand than in glass bead columns for both colloids at all four ionic strengths. However, the theoretical result was obtained by considering a very specific case (i.e., MIN) where DLVO interaction energies were minimum, as discussed previously using the concept of “interaction volume.” Previous theoretical studies (Suresh and Walz, 1996; Bhattacharjee et al, 1998; Rabinovich et al, 2000b; Cooper et al, 2001; Hoek et al, 2003; Hoek and Agarwal, 2006; Katainen et al, 2006) focused on examining the effects of surface roughness on reduction of the energy barrier but ignored its influence on colloid deposition at secondary minima, despite strong experimental evidence to the contrary (Litton and Olson, 1996; Hahn and O'Melia, 2004; Hahn et al, 2004; Redman et al, 2004; Tufenkji and Elimelech, 2004a, 2005; Shen et al, 2007, 2008, 2010; Canseco et al, 2009). Because colloids associated with collector surfaces via secondary minima are easily influenced by hydrodynamic shear, colloid attachments in secondary minima have been considered to occur mainly at low flow regions (e.g., grain–grain contacts) (Elimelech and O'Melia, 1990a,b; Johnson et al, 2007; Torkzaban et al, 2008; Bradford et al, 2009).…”

Section: Resultsmentioning

confidence: 99%

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Surface Roughness Effect on Deposition of Nano‐ and Micro‐Sized Colloids in Saturated Columns at Different Solution Ionic Strengths

Shen

Wang

et al. 2011

Vadose Zone Journal

107

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In this study we conducted experiments with saturated columns packed with sand and glass beads to quantitatively examine surface roughness effect on deposition and release of micro‐ and nano‐sized colloids at different solution ionic strengths. Experimental results showed more colloid retentions in both primary and secondary energy minima in sand than in glass bead columns, especially at high solution ionic strengths (e.g., >0.01 M). This observation cannot be explained by the classic Derjaguin–Landau–Verwey–Overbeek (DLVO) theory, which assumes sphere‐smooth surface configuration. We modified the Derjaguin approximation approach and calculated interaction energies, which indicate that the sharp asperities on sand surfaces can facilitate colloid deposition in primary minima by reducing the energy barrier. In addition, the increased attachment in secondary minima in sand columns can be attributed to the presence of the valleys on sand surfaces where colloids associated at secondary minima can be shielded from hydrodynamic shear. Additional theoretical analysis verified that large valleys can locally increase the energy barrier as well as the secondary‐minimum depth, and hence, are favorable for colloid deposition in secondary minima. Whereas the reduction effects of surface roughness on energy barrier has been extensively addressed in the literature, our modified DLVO analysis and experimental results demonstrate that the effect of this mechanism is only effective at high ionic strength for large colloids (e.g., >0.01 M for the 1156 nm colloid in this study). We provide experimental evidence and theoretical demonstration that surface roughness also plays an important role in colloid deposition at secondary minima under unfavorable conditions. Our study provides a more complete understanding of the effect of surface roughness on colloid deposition.

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Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Surface Roughness Effect on Deposition of Nano‐ and Micro‐Sized Colloids in Saturated Columns at Different Solution Ionic Strengths

Shen

Wang

et al. 2011

Vadose Zone Journal

107

View full text Add to dashboard Cite

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“…The geometrical configuration and physical parameters chosen for this study are based on recent experiments [29,30]. In those works, deposition and release of negatively charged colloidal latex particles of a radius, a p , of 400 nm in an artificial sintered silicate porous medium were investigated.…”

Section: Configurationmentioning

confidence: 99%

Numerical simulation of retention and release of colloids in porous media at the pore scale

Sefrioui

Ahmadi

Omari

et al. 2013

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Transport of a solid colloidal particle was simulated at the pore scale in presence of surface roughness and particle/pore physicochemical interaction by adopting a “one fluid” approach. A code developed in our laboratory was used to solve equations of motion, while implementing additional modules in order to take into account lubrication and physicochemical forces. Particles were recognized through a phase indicator function and the particle/fluid interface position at each instant was obtained by solving a transport equation. Roughnesses of different shapes were considered and the magnitude of the particle/pore physicochemical interaction was monitored through the change of the ionic strength of the suspending fluid. We first show that if pore surface is smooth no retention of the transported particle occurs whether the particle/pore surface is attractive or repulsive. However for shape roughnesses of “peak” or “valley”, particles may be retained inside pores or not depending on the considered ionic strength. In absence of particle retention, the residence time (the time needed for a particle to travel a characteristic pore distance) is finite and was found to be an increasing function of ionic strength for every considered roughness at fixed hydrodynamic conditions.International audienceTransport of a solid colloidal particle was simulated at the pore scale in presence of surface roughness and particle/pore physicochemical interaction by adopting a “one fluid” approach. A code developed in our laboratory was used to solve equations of motion, while implementing additional modules in order to take into account lubrication and physicochemical forces. Particles were recognized through a phase indicator function and the particle/fluid interface position at each instant was obtained by solving a transport equation. Roughnesses of different shapes were considered and the magnitude of the particle/pore physicochemical interaction was monitored through the change of the ionic strength of the suspending fluid. We first show that if pore surface is smooth no retention of the transported particle occurs whether the particle/pore surface is attractive or repulsive. However for shape roughnesses of “peak” or “valley”, particles may be retained inside pores or not depending on the considered ionic strength. In absence of particle retention, the residence time (the time needed for a particle to travel a characteristic pore distance) is finite and was found to be an increasing function of ionic strength for every considered roughness at fixed hydrodynamic conditions

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“…The transport process is usually modelled by a mass balance equation with fixed release and deposition rates described as a first-order kinetic equation. This approach has been used for saturated porous media (Tosco et al 2009;Canesco et al 2009) but also in unsaturated soils (Massoudieh andGinn 2007, Torkzaban et al 2008;Simunek et al 2006). In the majority of the studies, a single class of fines is modelled but work has been done to take into account fines of different size or nature in the porous media or in fractures (James and Chrysikopoulos 1999).…”

Section: Introductionmentioning

confidence: 98%

Experimental Investigation and Modelling of Colloidal Release in Porous Media

et al. 2011

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Gas production from underground storage reservoirs is sometimes associated with solid particles eroded from the rock matrix. This phenomenon often called sand production can cause damage to the storage equipments, leading the operator to choke the wells and prevent them from producing at full capacity. Colloid release is often associated as a precursor of larger solid production. Indeed, in sandstone storage sites, clay release induced by the presence of condensed water associated with the gas production in the near-wellbore region can be a forecast of intergranular cement erosion. The objective of this work is twofold: firstly to experimentally investigate colloidal particle detachment through ionic strength reduction (absence of salinity of the condensed water) in porous media and secondly to determine its evolution with time and to model it. Laboratory experiments with model systems are developed to reproduce the particle generation and their transport in porous media. The model porous medium is a packed column of two powders: silicon carbide particles of 50 µm and silica particles of 0.5 µm (3% by weight) initially mixed together. Brine flows at different concentrations are imposed through the porous sample and, at very low salt concentration, colloid silica particles are massively released from the medium. Experimental evolutions of the particle concentration with time are compared to solutions of the advection-dispersion equation including first-order source terms for colloid release. The dispersion coefficients of the porous medium have been determined with tracer tests. The experimental results exhibit a different behaviour at short-and long-time intervals and a model has been built to predict the colloid production evolution with the introduction of two different time scales for the eroded rate. The model can be used in a core test to evaluate the amount of detachable fines and the rate of erosion.

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Deposition and re-entrainment of model colloids in saturated consolidated porous media: Experimental study

Cited by 17 publications

References 28 publications

Surface Roughness Effect on Deposition of Nano‐ and Micro‐Sized Colloids in Saturated Columns at Different Solution Ionic Strengths

Surface Roughness Effect on Deposition of Nano‐ and Micro‐Sized Colloids in Saturated Columns at Different Solution Ionic Strengths

Numerical simulation of retention and release of colloids in porous media at the pore scale

Experimental Investigation and Modelling of Colloidal Release in Porous Media

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