Browsing by Author "Yaroshchuk, Andriy"
Now showing items 1-20 of 32
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A limiting case of constant counterion electrochemical potentials in the membrane for examining ion transfer at ion-exchange membranes and patches
(2019-10-08)
Article
Open AccessIon passage through ion-exchange membranes is vital in electrodialysis desalination, batteries and fuel cells, and water splitting. Simplified models of ion transport through such membranes frequently assume complete ... -
Addressing challenges in ion-selectivity characterization in nanopores
(American Chemical Society, 2024-04-12)
Article
Restricted access - publisher's policyIon selectivity is the basis for designing smart nanopore/channel-based devices, e.g., ion separators and biosensors. Quantitative characterization of ion selectivities in nanopores often employs the Nernst or Goldman–Hodgkin–Katz ... -
An engineering model for solute transport in semi-aromatic polymeric nanofiltration membranes: extension of solution-electro-diffusion model to complex mixtures
(Elsevier, 2021-08)
Article
Open AccessPressure-driven membrane processes, such as reverse osmosis (RO) and nanofiltration (NF), are preferred solutions for salinity reduction in ground, surface and sea waters as well as in mining and urban wastewaters. Interest ... -
Analysis of membrane transport equations for reverse electrodialysis (Red) using irreversible thermodynamics
(2020-09-01)
Article
Open AccessReverse electrodialysis (RED) is an electro-membrane process for the conversion of mixing energy into electricity. One important problem researchers’ face when modeling the RED process is the choice of the proper membrane ... -
Asymmetric electroosmotic pumping across porous media sandwiched with perforated ion-exchange membranes
(2017-07-01)
Article
Open AccessTo have non-zero net flow in AC electroosmotic pumps, the electroosmosis (EO) has to be non-linear and asymmetric. This can be achieved due to ionic concentration polarization. This is known to occur close to micro-/nano ... -
"Breakthrough" osmosis and unusually high power densities in Pressure-Retarded Osmosis in non-ideally semi-permeable supported membranes
(Macmillan Publishers, 2017-03-23)
Article
Open AccessOsmosis is the movement of solvent across a membrane induced by a solute-concentration gradient. It is very important for cell biology. Recently, it has started finding technological applications in the emerging processes ... -
Broadening of neutral analyte band in electroosmotic flow through slit channel with different zeta potentials of the walls
(2013-07)
Article
Restricted access - publisher's policyThe study is concerned with addressing hydrodynamic dispersion of an electroneutral non-adsorbed solute being transported by electroosmotic flow through a slit channel formed by walls with different zeta potentials. The ... -
Broadening of neutral solute band in electroosmotic flow through submicron channel with longitudinal non-uniformity of zeta potential
(2010-02)
Article
Restricted access - publisher's policyThe present study is concerned with broadening of neutral solute band in electrically driven flow through a straight channel with longitudinally varying zeta potential. The present analysis takes into account effects that ... -
Coupled concentration polarization and electroosmotic circulation near micro/nanointerfaces: Taylor-Aris model of hydrodynamic dispersion and limits of its applicability
(2011-09-20)
Article
Restricted access - publisher's policyMismatches in electrokinetic properties between micro- and nanochannels give rise to superposition of electroosmotic and pressure-driven flows in the microchannels. Parabolic or similar flow profiles are known to cause ... -
Current-induced concentration polarization of interfaces between non-ideally perm-selective ion-exchange media and electrolyte solutions
(2012-04-01)
Article
Restricted access - publisher's policyIn non-ideally perm-selective ion-exchange media and/or nano-porous/nano-channel systems, ion transport numbers depend on the salt concentration. Under conditions of current-induced polarization, this concentration changes ... -
Current-induced ion concentration polarization at a perfect ion-exchange patch in an infinite insulating wall
(2020-03-16)
Article
Open AccessThis research examines, theoretically, the ion concentration polarization, ion fluxes, and electrostatic fields near an ion- exchange patch in the wall of an electrified fluidic channel. These phenomena are important ... -
Electrokinetics in undeveloped flows
(2013-11)
Article
Restricted access - publisher's policyFor the correct interpretation of results of tangential electrokinetic measurements with porous materials, in particular, composite/asymmetric membranes on porous supports, it is necessary to have the data available for ... -
Electrophoresis and stability of nano-colloids: History, theory and experimental examples
(2014-09-01)
Article
Restricted access - publisher's policyThe paper contains an extended historical overview of research activities focused on determining interfacial potential and charge of dispersed particles from electrophoretic and coagulation dynamic measurements. Particular ... -
Evolution of electrolyte mixtures rejection behaviour using nanofiltration membranes under spiral wound and flat-sheet configurations
(2014-04-27)
Article
Restricted access - publisher's policyNanofiltration (NF) membranes can be used in different configurations. The aim of this work was to determine the reliability of the data obtained using flat-sheet (FS) laboratoryscale configuration when NF membranes are ... -
Experimental and theoretical study of nanofiltration of weak electrolytes: HSO4 - /SO4 2- system
(2018)
Conference lecture
Open Access -
Experimental and theoretical study of nanofiltration of weak electrolytes: SO4 2–/HSO4 –/H+ system
(2018-03-15)
Article
Open Access© 2018 Elsevier B.V. Over recent years, nanofiltration (NF) has been considered as an effective way to improve processing steps in metallurgical and hydrometallurgy applications dealing with mixtures of metal ions in ... -
Fundamentals of selective ion transport through multilayer polyelectrolyte membranes
(2013-01-14)
Article
Restricted access - publisher's policyMembranes composed of multilayer poly(4-styrenesul- fonate) (PSS)/protonated poly(allylamine) (PAH) fi lms on porous alumina supports exhibit high monovalent/divalent cation selectivities. Remarkably, the di ff usion ... -
Hydrodynamic dispersion in long microchannels under conditions of electroosmotic circulation: II. Electrolytes
(2016-03-19)
Article
Open AccessThis work describes the steady-state transport of an electrolyte due to a stationary concentration difference in straight long channels under conditions of electroosmotic circulation. The electroosmotic flow is induced due ... -
Implications of inhomogeneous distribution of concentration polarization for interpretation of pressure-driven
(2016-08-22)
Article
Open AccessA number of CFD studies have demonstrated that there is a considerable inhomogeneity of extent of Concentration Polarization (CP) over the membrane surface especially in spacer-filled feed channels. However, the consequences ... -
Influence of membrane sealing in pressure-driven test cells on their performance
(2019-01-01)
Article
Open AccessThis communication demonstrates the relevance of membrane sealing in a test cell to its performance. Membranes need to be sealed, and therefore a more or less significant (depending on the test cell design) peripheral part ...
