Factors affecting transport of bacterial cells in porous media

Mills, Allan; Herman, Janet S.; Hornberger, G.M.

doi:10.2172/7200280

Cited by 2 publications

(5 citation statements)

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“…[31], but based on the value to the value of in Eq. [15], or to the time since any of G rather than F. This treatment is consistent with location in the modeled domain is first exposed to some the observations of Mills et al (1994), cited previously, minimum threshold concentration of growth substrate.…”

Section: Rate Coefficientssupporting

confidence: 78%

“…[11] is of a form originally proposed by Higbie (1935), and later adapted by Danckwerts (1970), zero intercept (Mills et al, 1994). Their results for mixtures of clean and iron oxide-coated sands were de-but modified here for interphase mass transfer in variably saturated porous media.…”

Section: Solute Transportmentioning

confidence: 99%

“…total Gibbs free energies of surface interaction, calcu- Mills et al (1994) conducted batch experiments to lated from contact angle measurements, and deposition study the sorption of two bacterial strains with different (or attachment) coefficients (Bolster et al, 1998) that cell surface hydrophobicities to water-saturated, clean were calculated from the fraction of bacteria recovered quartz sand, to iron oxyhydroxide-coated quartz sand, during column experiments in the water-saturated poand to mixtures of the clean and iron oxide-coated sand.…”

Section: Bacterial Cell Attachment and Detachmentmentioning

confidence: 99%

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Coupled Microbial and Transport Processes in Soils

Rockhold

Yarwood

Selker

2004

Vadose Zone Journal

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1992b; MacDonald et al., 1999a, 1999b). Almost all previous work on this topic has focused on liquid-saturated This paper reviews methods for modeling coupled microbial and porous media systems, with relatively few attempts at transport processes in variably saturated porous media. Of special interest in this work are interactions between active microbial growth addressing more complicated unsaturated or variably satand other transport processes such as gas diffusion and interphase urated systems. This lack of attention to variably satuexchange of O 2 and other constituents that partition between the rated systems may be due in part to their added complexaqueous and gas phases. The role of gas-liquid interfaces on microbial ity, or may simply be due to the fact that low nutrient transport is also discussed, and various possible kinetic and equilibavailability and competition and predation by other rium formulations for bacterial cell attachment and detachment are microorganisms limits the growth of many soil microreviewed. The primary objective of this paper is to highlight areas in organisms so that they may only occupy a small or negliwhich additional research may be needed-both experimental and gible volume of the pore space. Under the high nutrient numerical-to elucidate mechanisms associated with the complex inloading conditions that might occur in applications such teractions that take place between microbial processes and flow and transport processes in soils. In addition to their general ecological as wastewater treatment or bioremediation, however, significance, these interactions have global-scale implications for C bacteria and other microorganisms can proliferate, and cycling in the environment and the related issue of climate change. the consequent changes in soil hydraulic properties may be significant (Rockhold et al., 2002). Many models have been developed for describing

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Section: Rate Coefficientssupporting

confidence: 78%

Section: Solute Transportmentioning

confidence: 99%

Section: Bacterial Cell Attachment and Detachmentmentioning

confidence: 99%

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Coupled Microbial and Transport Processes in Soils

Rockhold

Yarwood

Selker

2004

Vadose Zone Journal

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“…A number of studies have shown that the sorption of bacteria on mineral was a function of pH, temperature, ionic strength and surface coating of minerals [9,10]. The adsorption of Bacillus subtilis on corundum and quartz was found to be a physicochemical process and completely reversible.…”

Section: Introductionmentioning

confidence: 99%

“…The amounts of sorption showed linear correlation with bacterial concentrations. The coating of quartz by iron-oxyhydroxide markedly increased the adhesion of bacteria [10]. The attachment of a Fe(III)-reducing bacterium, Shewanella alga to amorphous Fe(III) oxide was dictated primarily by cell surface hydrophobicity, which may be promoted by hydrophobic surface protein 0927-7765/$ -see front matter © 2008 Elsevier B.V. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%