Bacterial deposition in porous medium as impacted by solution chemistry

Research in Microbiology
Gang Chen, Honglong Zhu

Abstract

Bacterial transport in porous medium was investigated by means of column experiments using typical rod-shaped bacteria of Escherichia coli and Pseudomonas fluorescens. Mobility of E. coli and P. fluorescens in silica gel decreased with increasing ionic strength of the solution. In the presence of nonionic surfactants, the mobility of E. coli and P. fluorescens increased, and this was more pronounced at lower than at higher ionic strength. Bacterial transport in the porous medium was described by the equilibrium-kinetic two-region model and bacterial deposition was assumed to occur in the kinetic adsorption region only. Quantified bacterial deposition from bacterial column breakthrough curves was related to electrostatic and Lifshitz-van der Waals interactions between bacterial cells and medium surfaces. It was found that electrostatic interactions played a more important role than Lifshitz-van der Waals interactions in determining bacterial deposition in the porous medium, and were actually the barrier for bacteria to attach to the porous medium.

References

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May 22, 2001·Environmental Microbiology·G Chen, K A Strevett
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Citations

Oct 4, 2011·Applied Microbiology and Biotechnology·Hassan AbbasnezhadJulia M Foght
Nov 28, 2006·Research in Microbiology·Nag-Choul ChoiSong-Bae Kim
Mar 23, 2017·Colloids and Surfaces. B, Biointerfaces·Houzhen WeiZhenze Li
Aug 8, 2009·Colloids and Surfaces. B, Biointerfaces·Hyon-Chong KimKi-Woo Kim
Jun 24, 2008·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Chang-Gu LeeSong-Bae Kim
Sep 3, 2021·Biophysics Reviews·Ilya Konyshev, Andrey Byvalov

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