Quantification of bacterial mass recovery as a function of pore-water velocity and ionic strength

Choi, Nag-Choul; Kim, Dong Ju; Kim, Song Bae

doi:10.1016/j.resmic.2006.09.007

Cited by 39 publications

(34 citation statements)

References 31 publications

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“…3). According to the CFT, it is expected to observe an increase of virus retention in porous media with decreasing q or U, because the number of collisions between viruses and collectors (glass beads) is expected to increase too (Camesano and Logan 1998;Choi et al 2007;Pang 2009). Note that the CFT assumes that the column packing is clean, and that deposited colloids do not affect the rate of colloid removal.…”

Section: Calculation Of Parameter Valuesmentioning

confidence: 99%

Transport of Human Adenoviruses in Water Saturated Laboratory Columns

et al. 2015

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Groundwater may be contaminated with infective human enteric viruses from various wastewater discharges, sanitary landfills, septic tanks, agricultural practices, and artificial groundwater recharge. Coliphages have been widely used as surrogates of enteric viruses, because they share many fundamental properties and features. Although a large number of studies focusing on various factors (i.e. pore water solution chemistry, fluid velocity, moisture content, temperature, and grain size) that affect biocolloid (bacteria, viruses) transport have been published over the past two decades, little attention has been given toward human adenoviruses (hAdVs). The main objective of this study was to evaluate the effect of pore water velocity on hAdV transport in water saturated laboratory-scale columns packed with glass beads. The effects of pore water velocity on virus transport and retention in porous media was examined at three pore water velocities (0.39, 0.75, and 1.22 cm/min). The results indicated that all estimated average mass recovery values for hAdV were lower than those of coliphages, which were previously reported in the literature by others for experiments conducted under similar experimental conditions. However, no obvious relationship between hAdV mass recovery and water velocity could be established from the experimental results. The collision efficiencies were quantified using the classical colloid filtration theory. Average collision efficiency, α, values decreased with decreasing flow rate, Q, and pore water velocity, U, but no significant effect of U on α was observed. Furthermore, the surface properties of viruses and glass beads were used to construct classical DLVO potential energy profiles. The results revealed that the experimental conditions of this study were unfavorable to deposition and that no aggregation between virus particles is expected to occur. A thorough understanding of the key processes governing virus transport is pivotal for public health protection.

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Section: Calculation Of Parameter Valuesmentioning

confidence: 99%

Transport of Human Adenoviruses in Water Saturated Laboratory Columns

et al. 2015

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“…Deposition of bacterial cells in geomedia appears to be affected by (1) microbial properties including surface charge [6], hydrophobicity [7, 8], bacterial size and shape [9], growth phase [10], motility [11], nutrition condition [12], chemotaxis [13], metabolic activity [14], and composition of the cell surface (e.g., lipopolysaccharide, extracellular polymeric substances, outer membrane proteins, flagella and fimbriae) [15–19], (2) soil properties including soil particles size and surface properties [17, 20], mineral content [21], moisture content [7] and organic matter or nutrients content [22, 23], (3) environmental factors including ionic strength and ion valence [24, 25], pH [26] and temperature [27]. In addition, hydraulic conditions such as flow velocity [28, 29], input microbial concentration [30] and heterogeneity of microbial populations [6] also play a role.…”

Section: Introductionmentioning

confidence: 99%

Effect of low-concentration rhamnolipid on transport of Pseudomonas aeruginosa ATCC 9027 in an ideal porous medium with hydrophilic or hydrophobic surfaces

Zhong

Liu

Jiang

et al. 2016

Colloids and Surfaces B: Biointerfaces

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The success of effective bioaugmentation processes for remediation of soil and groundwater contamination requires effective transport of the injected microorganisms in the subsurface environment. In this study, the effect of low concentrations of monorhamnolipid biosurfactant solutions on transport of Pseudomonas aeruginosa in an ideal porous medium (glass beads) with hydrophilic or hydrophobic surfaces was investigated by conducting miscible-displacement experiments. Transport behavior was examined for both glucose-grown and hexadecane-grown cells, with low or high surface hydrophobicity, respectively. A clean-bed colloid deposition model was used for determination of deposition rate coefficients. Results show that cells with high surface hydrophobicity exhibit greater retention than cells with low surface hydrophobicity. Rhamnolipid affects cell transport primarily by changing cell surface hydrophobicity, with an additional minor effect by increasing solution ionic strength. There is a good linear relation between k rhamnolipid-regulated cell surface hydrophobicity presented as bacterial-adhesion-to-hydrocarbon (BATH) rate of cells (R2 = 0.71). The results of this study show the importance of hydrophobic interaction for transport of bacterial cells in silica-based porous media, and the potential of using low-concentration rhamnolipid solutions for facilitating bacterial transport in bioaugmentation efforts.

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“…Since minimal adhesion to quartz has been previously observed [56][57][58][59], therefore, quartz substrates were used as the benchmark material for minimal bacterial attachment under the selected solution conditions. The adhesion characteristics of the bacteria suspended in either IS of KCl solutions are shown in Fig.…”

Section: Bacterial Adhesion On Quartz and Engineered Surfacesmentioning

confidence: 99%

Antimicrobial behavior of novel surfaces generated by electrophoretic deposition and breakdown anodization

Flores

Joung

Kinsinger

et al. 2015

Colloids and Surfaces B: Biointerfaces

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Biofilms have devastating impacts on many industries such as increased fuel consumption and damage to surfaces in maritime industries. Ideal biofouling management is inhibition of initial bacterial attachment. The attachment of a model marine bacterium (Halomonas pacfica g) was investigated to evaluate the potential of these new novel surfaces to resist initial bacterial adhesion. Novel engineered surfaces were generated via breakdown anodization or electrophoretic deposition, to modify three parameters: hydrophobicity, surface chemistry, and roughness. Mass transfer rates were determined using a parallel plate flow chamber under relevant solution chemistries. The greatest deposition was observed on the superhydrophilic surface, which had micro- and nano-scale hierarchical structures composed of titanium oxide deposited on a titanium plate. Conversely, one of the hydrophobic surfaces with micro-porous films overlaid with polydimethylsiloxane appeared to be most resistant to cell attachment.

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Quantification of bacterial mass recovery as a function of pore-water velocity and ionic strength

Cited by 39 publications

References 31 publications

Transport of Human Adenoviruses in Water Saturated Laboratory Columns

Transport of Human Adenoviruses in Water Saturated Laboratory Columns

Effect of low-concentration rhamnolipid on transport of Pseudomonas aeruginosa ATCC 9027 in an ideal porous medium with hydrophilic or hydrophobic surfaces

Antimicrobial behavior of novel surfaces generated by electrophoretic deposition and breakdown anodization

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