Journal ArticleDOI
Hindered transport of large molecules in liquid‐filled pores
TLDR
In this article, the authors present a review of the state-of-the-art work on hindered transport in liquid-filled pores of molecular dimensions, and the present status of this research is reviewed.Abstract:
Transport in liquid-filled pores of molecular dimensions plays an important role in membrane separations, in various forms of chromatography, and in catalysis, to name a few examples. A frequent observation is that if the pore dimensions are of the same order as those of a solute molecule, the apparent diffusion coefficient of that solute is much lower than in bulk solution. Likewise, rates of convective transport of such solutes are generally lower than the product of bulk concentration and volume flow rate. Thus, solute transport is typically “hindered” or restricted. A key objective of research on hindered transport is to be able to predict the applicable transport coefficients from such fundamental information as the size, shape, and electrical charge of the solutes and pores. The present status of this research is reviewed.read more
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Journal ArticleDOI
Transport phenomena in nanofluidics
TL;DR: In this paper, the authors investigated the transport properties of 50-nm-high 1D nanochannels on a chip and showed that they can be used for the separation and preconcentration of proteins.
Journal ArticleDOI
Nanofiltration membranes review: Recent advances and future prospects
Abdul Wahab Mohammad,Yeit Haan Teow,Wei Lun Ang,Ying Tao Chung,Darren L. Oatley-Radcliffe,Nidal Hilal,Nidal Hilal +6 more
TL;DR: Nanofiltration (NF) membranes have come a long way since it was first introduced during the late 80's as mentioned in this paper, and significant development has taken place in terms of the fundamental understanding of the transport mechanism in NF membranes, which has been translated into predictive modeling based on the modified extended Nernst-Planck equation.
Journal ArticleDOI
The Maxwell-Stefan approach to mass transfer
Rajamani Krishna,J.A. Wesselingh +1 more
TL;DR: In this paper, the limitations of the Fick's law for describing diffusion are discussed and it is argued that the Maxwell-Stefan formulation provides the most general and convenient approach for describing mass transport which takes proper account of thermodynamic non-idealities and influence of external force fields.
Journal ArticleDOI
Diffusion in brain extracellular space.
Eva Syková,Charles Nicholson +1 more
TL;DR: Experimental studies with the real-time iontophoresis method employing the cation tetramethylammonium in normal brain tissue improve the conception of ECS structure and the roles of glia and extracellular matrix in modulating the ECS microenvironment.
Journal ArticleDOI
Factors affecting the rejection of organic solutes during NF/RO treatment—a literature review
TL;DR: Findings of a comprehensive literature review are reported, targeting membrane rejection mechanisms and factors affecting rejection, and a rejection diagram was proposed, which qualitatively allows prediction of solute rejection if certain solute and membrane properties are known.
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