Comparison of the transport of Bacteroides fragilis and Escherichia coli within saturated sand packs

Johanson, Jennifer J.; Feriancikova, Lucia; Banerjee, Areen; Saffarini, Daâd A.; Wang, Lixia; Jin, Li; Grundl, Tim; Xu, Shangping

doi:10.1016/j.colsurfb.2014.09.038

Cited by 12 publications

(4 citation statements)

References 36 publications

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“…aureus EVs became less negative, implying that the electrostatic repulsions between particles and collectors would be reduced to allow them to deposit to a greater extent. This observation is predicted by DLVO theory, and it follows a similar trend described in previous research regarding the effect of ionic strength on particle deposition, both for anthropogenic particles ,− and other biocolloids. ,, A similar destabilization could be seen in the less negative ζ-potential for P. fluorescens EVs at higher ionic strengths, but this effect was not observed for the deposition on collectors, as represented by the similar C / C 0 values.…”

Section: Resultssupporting

confidence: 89%

“…This observation is predicted by DLVO theory, and it follows a similar trend described in previous research regarding the effect of ionic strength on particle deposition, both for anthropogenic particles 36,42−44 and other biocolloids. 26,45,46 A similar destabilization could be seen in the less negative ζ-potential for P. fluorescens EVs at higher ionic strengths, but this effect was not observed for the deposition on collectors, as represented by the similar C/C 0 values. This implies that there may be other factors influencing the deposition of P. fluorescens EVs, such as steric effects from other extracellular materials, hydrophobic effects, or unique interactions from the presence of lipopolysaccharides (LPS).…”

Section: Breakthrough Curves and α Determinationmentioning

confidence: 59%

“…Looking first at trends for the influence of ionic strength on EV deposition, expectations based on trends predicted by DLVO are that particle deposition should be favored at a higher ionic strength. ,,− From Figure , we noted that none of the EV populations deposited on the collector particles to a high extent at low ionic strength (1 mM). As ionic strength increased, different trends emerged for the different EV populations.…”

Section: Resultsmentioning

confidence: 90%

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Characterizing the Transport and Surface Affinity of Extracellular Vesicles Isolated from Yeast and Bacteria in Well-Characterized Porous Media

Rogers,

Hicks,

Kan

et al. 2023

Environ. Sci. Technol.

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Extracellular vesicles (EVs) are membrane-bounded, nanosized particles, produced and secreted by all biological cell types. EVs are ubiquitous in the environment, operating in various roles including intercellular communication and plant immune modulation. Despite their ubiquity, the role of EV surface chemistry in determining transport has been minimally investigated. Using the zeta (ζ)-potential as a surrogate for surface charge, this work considers the deposition of EVs from the yeast, Saccharomyces cerevisiae , and two bacterial species, Staphylococcus aureus and Pseudomonas fluorescens , in well-characterized porous medium under various background conditions shown to influence the transport of other environmental colloidal particles: ionic strength and humic acid concentration. The affinity of S. cerevisiae EVs for the porous medium (glass beads) appeared to be sensitive to changes in ionic strength, as predicted by colloid stability (Derjaguin, Landau, Verwey, and Overbeek or DLVO) theory, and humic acid concentration, while P. fluorescens EVs deviated from DLVO predictions, suggesting that mechanisms other than charge stabilization may control the deposition of P. fluorescens . Calculations of attachment efficiency from these deposition studies were used to estimate EV transport using a clean-bed filtration model. Based on these calculations, EVs could be transported through such homogeneous porous media up to 15 m.

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Section: Resultssupporting

confidence: 89%

Section: Breakthrough Curves and α Determinationmentioning

confidence: 59%

Section: Resultsmentioning

confidence: 90%

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Characterizing the Transport and Surface Affinity of Extracellular Vesicles Isolated from Yeast and Bacteria in Well-Characterized Porous Media

Rogers,

Hicks,

Kan

et al. 2023

Environ. Sci. Technol.

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“…These surface properties indicate that the presence of PFAAs in subsurface or groundwater systems influences the fate and transport of the concerned bacteria. Specifically, although the significance of different physical, chemical, and biological factors (such as grain shape and size, , fluid conditions, solution ionic strength and composition, , nutrient conditions, bacterial cell type and motility, , bacterial growth phase, and surface macromolecules , ) have been previously demonstrated to strongly affect the transport and deposition of bacteria in porous media, the influence of PFAAs, which are emerging contaminants in the environment, on the transport and deposition of bacteria has never been explored. Furthermore, recent studies , have reported that the competition for deposition sites created by other inorganic or organic colloids on the sand surface, which normally originate in the sand chemical heterogeneity under natural conditions (i.e., unfavorable conditions), significantly influences bacterial transport.…”

Section: Introductionmentioning

confidence: 99%

Influence of Perfluorooctanoic Acid on the Transport and Deposition Behaviors of Bacteria in Quartz Sand

Tong

Kim

2016

Environ. Sci. Technol.

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The significance of perfluorooctanoic acid (PFOA) on the transport and deposition behaviors of bacteria (Gram-negative Escherichia coli and Gram-positive Bacillus subtilis) in quartz sand is examined in both NaCl and CaCl2 solutions at pH 5.6 by comparing both breakthrough curves and retained profiles with PFOA in solutions versus those without PFOA. All test conditions are found to be highly unfavorable for cell deposition regardless of the presence of PFOA; however, 7%-46% cell deposition is observed depending on the conditions. The cell deposition may be attributed to micro- or nanoscale roughness and/or to chemical heterogeneity of the sand surface. The results show that, under all examined conditions, PFOA in suspensions increases cell transport and decreases cell deposition in porous media regardless of cell type, presence or absence of extracellular polymeric substances, ionic strength, and ion valence. We find that the additional repulsion between bacteria and quartz sand caused by both acid-base interaction and steric repulsion as well as the competition for deposition sites on quartz sand surfaces by PFOA are responsible for the enhanced transport and decreased deposition of bacteria with PFOA in solutions.

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Retention and Transport of PAH-Degrading Bacterium Herbaspirillum chlorophenolicum FA1 in Saturated Porous Media Under Various Physicochemical Conditions

Gao

et al. 2017

Water Air Soil Pollut

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Comparison of the transport of Bacteroides fragilis and Escherichia coli within saturated sand packs

Cited by 12 publications

References 36 publications

Characterizing the Transport and Surface Affinity of Extracellular Vesicles Isolated from Yeast and Bacteria in Well-Characterized Porous Media

Characterizing the Transport and Surface Affinity of Extracellular Vesicles Isolated from Yeast and Bacteria in Well-Characterized Porous Media

Influence of Perfluorooctanoic Acid on the Transport and Deposition Behaviors of Bacteria in Quartz Sand

Retention and Transport of PAH-Degrading Bacterium Herbaspirillum chlorophenolicum FA1 in Saturated Porous Media Under Various Physicochemical Conditions

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