Pore‐scale Study of Ion Transport Mechanisms in Inhomogeneously Charged Nanoporous Rocks: Impacts of Interface Properties on Macroscopic Transport

Alizadeh, Amer; Xu, Jinkai; Wang, Moran

doi:10.1029/2018jb017200

Cited by 17 publications

(13 citation statements)

References 82 publications

(133 reference statements)

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“…With this aim, Alizadeh et al. [96] conducted a theoretical study to investigate effect of local solution properties on the macroscopic transport phenomena in tight porous media with an average pore size on the order of a few nanometers. Three‐dimensional unstructured porous media (Fig.…”

Section: Eof Through Nanoscale Pores and Channelsmentioning

confidence: 99%

“…The cross‐sections of the porous media are shown with porosities (B)

ε

= 0.3, (C)

ε

= 0.4, (D)

ε

= 0.5, and (E)

ε

= 0.6. The figures have been reprinted from [96].…”

Section: Eof Through Nanoscale Pores and Channelsmentioning

confidence: 99%

“…Two scenarios were compared: homogenous and inhomogeneous external charge distribution. The figure has been reprinted from [96].…”

Section: Eof Through Nanoscale Pores and Channelsmentioning

confidence: 99%

“…Porous media can be defined as any naturally (i.e., underground soil or brain) or artificially (i.e., filtration or fuel cell membranes) produced complex material with a very high surface-to-volume ratio. Applications of such porous media are very broad-from biology [93,94] and environmental science [25,26,[95][96][97][98] to geology [99][100][101][102][103]. This section aims to highlight EOF through microporous media by focusing on relevant applications.…”

Section: Eof Through Microporous Mediamentioning

confidence: 99%

“…As we discussed above, the experimental study has shown that transport in porous media with an overlapped regime is considerably different from that in nonoverlapped EDL regime that is typically found in microporous media. With this aim, Alizadeh et al [96] conducted a theoretical study to investigate effect of local solution properties on the macroscopic transport phenomena in tight porous media with an average pore size on the order of a few nanometers. Three-dimensional unstructured porous media (Fig.…”

Section: Eof Through Nanoporous Mediamentioning

confidence: 99%

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Electroosmotic flow: From microfluidics to nanofluidics

et al. 2021

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Electroosmotic flow (EOF), a consequence of an imposed electric field onto an electrolyte solution in the tangential direction of a charged surface, has emerged as an important phenomenon in electrokinetic transport at the micro/nanoscale. Because of their ability to efficiently pump liquids in miniaturized systems without incorporating any mechanical parts, electroosmotic methods for fluid pumping have been adopted in versatile applications—from biotechnology to environmental science. To understand the electrokinetic pumping mechanism, it is crucial to identify the role of an ionically polarized layer, the so‐called electrical double layer (EDL), which forms in the vicinity of a charged solid–liquid interface, as well as the characteristic length scale of the conducting media. Therefore, in this tutorial review, we summarize the development of electrical double layer models from a historical point of view to elucidate the interplay and configuration of water molecules and ions in the vicinity of a solid–liquid interface. Moreover, we discuss the physicochemical phenomena owing to the interaction of electrical double layer when the characteristic length of the conducting media is decreased from the microscale to the nanoscale. Finally, we highlight the pioneering studies and the most recent works on electro osmotic flow devoted to both theoretical and experimental aspects.

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Section: Eof Through Nanoscale Pores and Channelsmentioning

confidence: 99%

“…The cross‐sections of the porous media are shown with porosities (B)

ε

= 0.3, (C)

ε

= 0.4, (D)

ε

= 0.5, and (E)

ε

= 0.6. The figures have been reprinted from [96].…”

Section: Eof Through Nanoscale Pores and Channelsmentioning

confidence: 99%

“…Two scenarios were compared: homogenous and inhomogeneous external charge distribution. The figure has been reprinted from [96].…”

Section: Eof Through Nanoscale Pores and Channelsmentioning

confidence: 99%

Section: Eof Through Microporous Mediamentioning

confidence: 99%

Section: Eof Through Nanoporous Mediamentioning

confidence: 99%

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Electroosmotic flow: From microfluidics to nanofluidics

et al. 2021

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Temperature effects on electrical double layer at solid‐aqueous solution interface

Alizadeh

Wang

2020

Electrophoresis

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Despite the significant influence of solution temperature on the structure of electrical double layer, the lack of theoretical model intercepts us to explain and predict the interesting experimental observations. In this work, we study the structure of electrical double layer as a function of thermochemical properties of the solution by proposing a phenomenological temperature dependent surface complexation model. We found that by introducing a buffer layer between the diffuse layer and stern layer, one can explain the sensitivity of zeta potential to temperature for different bulk ion concentrations. Calculation of the electrical conductance as function of thermochemical properties of solution reveals the electrical conductance not only is a function of bulk ion concentration and channel height but also the solution temperature. The present work model can provide deep understanding of micro‐ and nanofluidic devices functionality at different temperatures.

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Relevance of charge interactions for contaminant transport in heterogeneous formations: a stochastic analysis

Muniruzzaman

Rolle

2023

Stoch Environ Res Risk Assess

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The electrostatic properties of clay (or other charged) mineral surfaces play a significant role in the fate, transport, persistence, and remediation of subsurface contaminant plumes. This study presents a stochastic assessment of the impact and relevance of microscale electrostatic effects on macroscopic, field-scale contaminant transport in heterogeneous groundwater systems involving spatially distributed clay zones. We present Monte Carlo simulations in two-dimensional heterogeneous fields, comprising heterogeneous distributions of physical (i.e., hydraulic conductivity, porosity, tortuosity) and electrostatic (i.e., surface charge) properties, and compare scenarios with different combination and extent of physical and electrostatic processes. The simulations were performed with the multi-continua based reactive transport code, MMIT-Clay, and considering an explicit treatment of the diffuse layer processes. The results reveal that the microscopic electrostatic mechanisms within clay’s diffuse layer can significantly accelerate or retard a particular contaminant depending on its charge, leading to considerably different solute breakthroughs and mass loading/release behaviors in low permeability inclusions. Furthermore, we show that such variations in the macroscale transport behavior, solely driven by charge interactions, are statistically significant over the ensembles of Monte Carlo realizations. The simulations also demonstrate that the omission of electrostatic processes, which is still a common practice in subsurface hydrology, can lead to substantial over- or underestimation of contaminant migration.

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Pore‐scale Study of Ion Transport Mechanisms in Inhomogeneously Charged Nanoporous Rocks: Impacts of Interface Properties on Macroscopic Transport

Cited by 17 publications

References 82 publications

Electroosmotic flow: From microfluidics to nanofluidics

Electroosmotic flow: From microfluidics to nanofluidics

Temperature effects on electrical double layer at solid‐aqueous solution interface

Relevance of charge interactions for contaminant transport in heterogeneous formations: a stochastic analysis

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