Bacterial deposition in porous media: effects of cell-coating, substratum hydrophobicity, and electrolyte concentration
Article Abstract:
A previous study has shown that cell size and cell-solid interactions influence bacterial deposition in coarse grain media. Herein, it is shown that physicochemical factors affect bacterial transport through the clean bed collision efficiency and the area blocked by an attached cell. Analysis of the deposition of seven bacterial strains revealed that cell-cell repulsion enhances blocking and that interactions between the cell and solids are influenced by properties such as cell coating, hydrophobicity of the substratum and the ionic strength of the aqueous phase.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Application of clean-bed filtration theory to bacterial deposition in porous media
Article Abstract:
Bacterial depositions in porous media can have a considerable impact on the supply of water, the contamination of groundwater and the treatment of wastewater. Filtration theory was used to describe bacterial-cell deposition in clean porous media. An equation was developed to illustrate how a one-dimensional clean-bed filter removes suspended particles. It was hypothesized that the interaction of diffuse layers with similar charges can impede bacterial deposition. The research showed that bacteria can be analyzed through mechanistic models of particle transport.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1992
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Bacterial deposition in porous media related to the clean bed collision efficiency and to substratum blocking by attached cells
Article Abstract:
A collision-blocking model was developed to represent deposition of Pseudomonas putida mt2 and Rhodococcus strain C125 during their transport in coarse grain media such a sand columns. Measurements of clean bed collision efficiency and the surface area blocked by attached cells provided evidence showing that cell size and cell-solid interactions influence bacterial deposition.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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