Cotransport of <i>Pseudomonas putida</i> and kaolinite particles through water‐saturated columns packed with glass beads

Vasiliadou, Ioanna A.; Chrysikopoulos, Constantinos V.

doi:10.1029/2010wr009560

Cited by 100 publications

(77 citation statements)

References 80 publications

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“…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%

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%

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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“…Furthermore, theoretical and numerical procedures have been developed for the estimation of hydrodynamic dispersion coefficients for both periodic as well as heterogeneous porous media. Macroscopic dispersion is traditionally determined by averaging pore-scale simulations of dispersion, which are based on detailed descriptions of the pore structure [van Milligen and Bons, 2012;Icardi et al, 2014]. For periodic porous media, dispersion coefficients may be determined with volume averaging and generalized Taylor-Aris-Brenner techniques, by defining a representative elementary volume (REV) [Whitaker, 1986;Chrysikopoulos et al, 1992aChrysikopoulos et al, , 1992b.…”

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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“…Here too, we witness a higher attachment of bacteria onto kaolinite than to bentonite clay. Also, earlier work has exhibited from the batch experiments conducted with kaolinite and bacteria that they showed attachment which was adequately described by Langmuir isotherm [10]. In that study, the observed reduction of the bacteria Pseudomonas putida recovery in the column outflow was attributed to bacteria attachment onto kaolinite particles, which were retained in the solid matrix (glass beads) of the column.…”

Section: Influence Of Kaolinite On the Transport Of Bacteriamentioning

confidence: 72%

“…The role of natural organic matter and inorganic colloids on the transport of bacteria has received significant attention in the past few years [10]. Studies have revealed that the inorganic colloids are primarily responsible for the migration of contaminants in soils and aquifers [11].…”

Section: Introductionmentioning

confidence: 99%

Transport of E. coli in Presence of Naturally Occuring Colloids in Saturated Porous Media

Madumathi

2017

Water Conserv Sci Eng

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This study focuses on the effects of organic (humic acid substances) and inorganic (bentonite clay, silicate, and kaolinite clay) colloids on the transport of bacteria under saturated flow conditions. The transport experiments of Escherichia coli were performed in 40-cm long column filled with river sand of diameter 400 μm. Batch sorption experiments were conducted to understand the attachment kinetics of bacteria in the presence of humic acid and clay colloids. Humic acid was found to enhance the transport of bacteria by 17.3% in the presence of NaCl and by 10.3% in the presence of CaCl 2 while clay colloids were found to reduce the transport. The transport of bacteria decreased by 11.8, 33.8, and 67% (in the presence of NaCl) and by 58.8, 41.18, and 76.5% (in the presence of CaCl 2 ) with bentonite clay, silicate, and kaolinite clay colloids, respectively. The addition of divalent ion enhanced the complexity leading to the formation of complexes thereby reducing the transport. The combined existence of these colloids, the water chemistry, and the chemical composition of the colloids could govern the interaction processes in the subsurface matrix and can hence influence the transport of biocolloids in the environment significantly.

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Cotransport of Pseudomonas putida and kaolinite particles through water‐saturated columns packed with glass beads

Cited by 100 publications

References 80 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

Transport of E. coli in Presence of Naturally Occuring Colloids in Saturated Porous Media

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