Abstract
Successful prediction of bacterial transport and adhesion in saturated natural porous media requires a fundamental mechanistic understanding of the important processes involved. Colloid filtration theory (CFT) provides a convenient framework for attaining this understanding, but the classical CFT was developed for non-living colloids and is still widely applied to the case of bacterial colloids without consideration of the unique traits of bacteria. This chapter lays the groundwork for using CFT to further our mechanistic understanding of bacterial transport processes at the laboratory column scale and below. Included in this is a reexamination of some of the key assumptions of CFT, notably those implicit in the derivation of the so-called filtration equation. A new form of the filtration equation is proposed for more reliable testing of the CFT parameter η (the frequency at which colloids come into contact with porous media surfaces or energy barriers) against experimental data. Initial work applying CFT to the case of bacterial polymer interactions is also presented.
Published Version
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