Cotransport of clay colloids and viruses in water saturated porous media

Syngouna, Vasiliki I.; Chrysikopoulos, Constantinos V.

doi:10.1016/j.colsurfa.2012.10.018

Cited by 114 publications

(85 citation statements)

References 68 publications

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“…Other clay types are those composed of a mixture of these four clays (Jiang 2012). Clay particles have a high potential to interact with other (bio) colloids and could serve as carriers of colloids due to their surface charge heterogeneity (Schroth and Sposito 1997;Vasiliadou and Chrysikopoulos 2011;Syngouna and Chrysikopoulos 2013;Cai et al 2014). Depending on the physicochemical conditions in the porous media, clay particles may facilitate or hinder the mobility of colloids in a study by Yang et al (2012), they found that the presence of bentonite in suspensions significantly reduced the transport of bacteria in the quartz sand porous media while Abdel-Fattah et al (2013) observed that the plutonium colloids transport was facilitated though subsurface soil by presence of smectite clay.…”

Section: Introductionmentioning

confidence: 99%

“…Presence of clay particles in porous media is another influential parameter on NPs transport (Schroth and Sposito 1997;Vasiliadou and Chrysikopoulos 2011;Syngouna and Chrysikopoulos 2013;Cai et al 2014). Clay particles are the most abundant inorganic colloids in natural aquatic systems (Cai et al 2014) and there are approximately thirty different types (Wilson et al 2014).…”

Section: Introductionmentioning

confidence: 99%

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Influence of clay particles on Al2O3 and TiO2 nanoparticles transport and retention through limestone porous media: measurements and mechanisms

et al. 2015

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Utilization of nanoparticles (NPs) for a broad range of applications has caused considerable quantities of these materials to be released into the environment. Issues of how and where the NPs are distributed into the subsurface aquatic environments are questions for those in environmental engineering. This study investigated the influence of three abundant clay minerals namely kaolinite, montmorillonite, and illite in the subsurface natural aquatic systems on the transport and retention of aluminum oxide (Al 2 O 3 , 40 nm) and titanium dioxide (TiO 2 , 10-30 nm) NPs through saturated limestone porous media. The clay concentrations in porous media were set at 2 and 4 vol% of the holder capacity. Breakthrough curves in the columns outlets were measured using a UV-Vis spectrophotometer. It was found that the maximum NPs recoveries were obtained when there was no clay particle in the porous medium. On the other hand, increase in concentration of clay particles has resulted in the NPs recoveries being significantly declined. Due to fibrous structure of illite, it was found to be more effective for NPs retention in comparison to montmorillonite and kaolinite. Overall, the position of clay particles in the porous media pores and their morphologies were found to be two main reasons for increase of NPs retention in porous media.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of clay particles on Al2O3 and TiO2 nanoparticles transport and retention through limestone porous media: measurements and mechanisms

et al. 2015

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“…For nonperiodic or heterogeneous porous media, where REV selection Previous studies have suggested that colloid transport in porous media is significantly affected by particle size [Fontes et al, 1991, Gannon et al, 1991. Early breakthrough of colloids and biocolloids as compared to that of conservative tracers has been observed in several studies [Bales et al, 1989;Toran and Palumbo, 1992;Powelson et al, 1993;Grindrod et al, 1996;Dong et al, 2002;Keller et al, 2004;Vasiliadou and Chrysikopoulos, 2011;Sinton et al, 2012;Syngouna and Chrysikopoulos, 2013;Chrysikopoulos and Syngouna, 2014]. Colloid early breakthrough can be attributed to effective porosity reduction (colloids cannot penetrate smaller pores due to their inability to fit into them), preferential flow paths through high-conductivity regions, and exclusion from the lower-velocity regions [Chrysikopoulos and Abdel-Salam, 1997;Dong et al, 2002;Ginn, 2002;Ahfir et al, 2009], which can also be viewed as a reduction of the effective porosity of the porous medium [Morley et al, 1998].…”

Section: Introductionmentioning

confidence: 99%

Colloid particle size‐dependent dispersivity

Chrysikopoulos,

Katzourakis

2015

Water Resources Research

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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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“…Katzourakis and Chrysiko poulos [24] developed a conceptual and mathematical model for colloid and virus cotransport in porous media. They solved the governing equations numerically using finite difference methods and tested their results with experimental data collected by Syngouna and Chrysikopoulos [23]. The results showed that interactions between colloids and viruses can dramatically affect the fate and transport of viruses in porous media.…”

Section: Introductionmentioning

confidence: 94%

“…Sen [22] has reviewed a large volume of work that has already been performed towards understanding the processes in pathogenic biocolloidal contaminants transport in saturated and unsaturated porous media. Syngouna and Chrysikopoulos [23] conducted experiments to investigate the effects of cotransport of colloidal clay and viruses in saturated porous media. These experiments have been done in laboratory-packed columns.…”

Section: Introductionmentioning

confidence: 99%

Colloid-Associated Groundwater Contaminant Transport in Homogeneous Saturated Porous Media: Mathematical and Numerical Modeling

Kheirabadi

Niksokhan

Omidvar

2016

Environ Model Assess

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During the past two decades, significant efforts have been made to study contaminant transport in the presence of colloids. Several researchers reported that colloidal particles could enhance the migration of contaminants in groundwater by reducing retardation factor. When the colloidal particles are present in the aquifer, the subsurface system can be considered as a three-phase system with two solid phases and an aqueous phase. The interaction between contaminants, colloids, and solid matrix should be considered in assessing the fate and transport of the contaminant in the groundwater flow system. In this study, a one-dimensional numerical model is developed by employing a fully implicit finite difference method. This model is based on mass balance equations and mass partition mechanisms between the carriers and solid matrix, as well as between the carriers and contaminants in a saturated homogeneous porous medium. This phenomenon is presented by two approaches: equilibrium approach and fully kinetic first-order approach. The formulation of the model can be simplified by employing equilibrium partitioning of particles. However, contaminant transport can be predicted more accurately in realistic situations by kinetic modeling. To test the sensitivity of the model, the effect of the various chemical and physical coefficients on the migration of contaminant was investigated. The results of numerical modeling matched favorably with experimental data reported in the literature.

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Cotransport of clay colloids and viruses in water saturated porous media

Cited by 114 publications

References 68 publications

Influence of clay particles on Al2O3 and TiO2 nanoparticles transport and retention through limestone porous media: measurements and mechanisms

Influence of clay particles on Al2O3 and TiO2 nanoparticles transport and retention through limestone porous media: measurements and mechanisms

Colloid particle size‐dependent dispersivity

Colloid-Associated Groundwater Contaminant Transport in Homogeneous Saturated Porous Media: Mathematical and Numerical Modeling

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