Prediction of colloid detachment in a model porous media: Thermodynamics

Bergendahl, John; Grasso, Domenico

doi:10.1002/aic.690450305

Cited by 126 publications

(98 citation statements)

References 45 publications

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“…It is known that hydrophobic interaction plays a dominant role in bacterial adsorption to AWI (Powelson and Mills 1996). The existence of attractive hydrophobic interactions has been repeatedly demonstrated and measured in various experiments (Bergendahl and Grasso 1999;Chin and Flurry 2005;Lazouskaya and Jin 2008;Nalaskowski et al 2002). Hydrophobic attraction takes place in interactions of a biocolloidal particle and AWI (Ducker et al 1994).Currently, there are two major quantitative approach to describe hydrophobic interactions: (a) approach developed by van Oss (van Oss 1994(van Oss , 2006 which characterizes colloid interactions as a sum of electrostatic, LW and polar, or Lewis acid-base (AB) interactions, and (b) the empirical power law-based approach introduced by Yoon and co-workers (Yoon and Mao 1996).…”

Section: Biocolloid Transport Processes In Unsaturated Porous Mediamentioning

confidence: 88%

Processes in Pathogenic Biocolloidal Contaminants Transport in Saturated and Unsaturated Porous Media: A Review

Sen

2010

Water Air Soil Pollut

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Section: Biocolloid Transport Processes In Unsaturated Porous Mediamentioning

confidence: 88%

Processes in Pathogenic Biocolloidal Contaminants Transport in Saturated and Unsaturated Porous Media: A Review

Sen

2010

Water Air Soil Pollut

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“…The retarded London-van der Waals attractive interaction force was determined from the expression of Gregory (1981). The Hamaker constant was 6.5 * 10 −21 J for D21g (Rijnaarts et al, 1995) and 4.04 * 10 −21 J for CML NPs (Bergendahl and Grasso, 1999). Table 1 summarizes measured values for zeta potentials for D21g, CML NPs, and sand, and the calculated energy barrier height and depth of the secondary minimum for the DLVO interaction energies in the various solution chemistries.…”

Section: Interaction Energy Calculationsmentioning

confidence: 99%

Equilibrium and kinetic models for colloid release under transient solution chemistry conditions

Bradford

Torkzaban

Leij

et al. 2015

Journal of Contaminant Hydrology

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We present continuum models to describe colloid release in the subsurface during transient physicochemical conditions. Our modeling approach relates the amount of colloid release to changes in the fraction of the solid surface area that contributes to retention. Equilibrium, kinetic, equilibrium and kinetic, and two-site kinetic models were developed to describe various rates of colloid release. These models were subsequently applied to experimental colloid release datasets to investigate the influence of variations in ionic strength (IS), pH, cation exchange, colloid size, and water velocity on release. Various combinations of equilibrium and/or kinetic release models were needed to describe the experimental data depending on the transient conditions and colloid type. Release of Escherichia coli D21g was promoted by a decrease in solution IS and an increase in pH, similar to expected trends for a reduction in the secondary minimum and nanoscale chemical heterogeneity. The retention and release of 20 nm carboxyl modified latex nanoparticles (NPs) were demonstrated to be more sensitive to the presence of Ca 2+ than D21g. Specifically, retention of NPs was greater than D21g in the presence of 2 mM CaCl 2 solution, and release of NPs only occurred after exchange of Ca 2+ by Na + and then a reduction in the solution IS. These findings highlight the limitations of conventional interaction energy calculations to describe colloid retention and release, and point to the need to consider other interactions (e.g., Born, steric, and/ or hydration forces) and/or nanoscale heterogeneity. Temporal changes in the water velocity did not have a large influence on the release of D21g for the examined conditions. This insensitivity was likely due to factors that reduce the applied hydrodynamic torque and/or increase the resisting adhesive torque; e.g., macroscopic roughness and grain-grain contacts. Our analysis and models improve our understanding and ability to describe the amounts and rates of colloid release and indicate that episodic colloid transport is expected under transient physicochemical conditions. Published by Elsevier B.V.

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“…[22] with written permission. these forces acting on the colloidal particles and the matrix surface [6,7,14,53].…”

Section: Chemically Induced Release Processesmentioning

confidence: 99%

Review on subsurface colloids and colloid-associated contaminant transport in saturated porous media

Sen

Khilar

2006

Advances in Colloid and Interface Science

383

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Prediction of colloid detachment in a model porous media: Thermodynamics

Abstract: Detachment of polystyrene latex colloids was studied in a model

Cited by 126 publications

References 45 publications

Processes in Pathogenic Biocolloidal Contaminants Transport in Saturated and Unsaturated Porous Media: A Review

Processes in Pathogenic Biocolloidal Contaminants Transport in Saturated and Unsaturated Porous Media: A Review

Equilibrium and kinetic models for colloid release under transient solution chemistry conditions

Review on subsurface colloids and colloid-associated contaminant transport in saturated porous media

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