KCl transport mechanism across charged mosaic membrane in KCl–sucrose mixed system

Fukuda, Takashi; Yang, Wongkang; Yamauchi, Akira

doi:10.1016/s0376-7388(02)00506-9

Cited by 16 publications

(14 citation statements)

References 12 publications

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“…Charge-mosaic membranes prepared using microspheres were used [19][20][21]. We have extended the results obtained by previous investigators by studying transport rates of divalent 2:2 and 2:1 electrolytes.…”

Section: Introductionmentioning

confidence: 85%

Electrolyte dialysis using charge-mosaic membranes

Grzenia

Yamauchi

Wickramasinghe

2009

Desalination and Water Treatment

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A B S T R A C TCharge-mosaic membranes represent a subset of bipolar membranes. They contain anion-and cation-permeable domains. Anions and cations can pass through the membrane without violation of microscopic electrical neutrality. Consequently, much higher rates of transport of electrolytes compared to non-electrolytes of the same size are obtained. The ability of charge-mosaic membranes to separate low molecular weight electrolytes from non-electolytes of similar size could lead to applications such as desalination of amino acids and other organic species. Here we have determined rates of CoCl 2 (2:1 electrolyte), CuSO 4 (2:2 electrolyte), NiSO 4 (2:2 electrolyte), and NiCl 2 (2:1 electrolyte) transport through a charge-mosaic membrane made of microspheres under dialysis conditions. The results are compared to literature values for transport of KCl, a monovalent 1:1 electrolyte. Our results indicate that the mass flux of salt is the same for all four salts and for KCl. In all cases negative osmosis is observed where the volume of the dialysate increases. At the same initial dialysand salt concentration, the volume of the dialysate compartment increased more rapidly for divalent 2:1 electrolytes compared to monovalent 1:1 and divalent 2:2 electrolytes tested here. The results highlight the effect of electrolyte charge on permeability for charge-mosaic membranes.

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Section: Introductionmentioning

confidence: 85%

Electrolyte dialysis using charge-mosaic membranes

Grzenia

Yamauchi

Wickramasinghe

2009

Desalination and Water Treatment

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“…For a combination of the electrolyte and non-electrolyte system (KCl-sucrose mixed aqueous solution), the model of the Kedem and Katchalsky (1958), more particularly, Fukuda et al (2003) have modified Eqs. (1) and (3) in order to predict the effect of sucrose on the separation of KCI through a mosaic membrane.…”

Section: The Fukuda Et Al Modelmentioning

confidence: 99%

Scope and limitations of the irreversible thermodynamics and the solution diffusion models for the separation of binary and multi-component systems in reverse osmosis process

Al‐Obaidi

Kara-Zaïtri

Mujtaba

2017

Computers & Chemical Engineering

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Reverse osmosis process is used in many industrial applications ranging from solute-solvent to solvent-solvent and gaseous separation. A number of theoretical models have been developed to describe the separation and fluxes of solvent and solute in such processes. This paper looks into the scope and limitations of two main models (the irreversible thermodynamics and the solution diffusion models) used in the past by several researchers for solute-solvent feed separation. Despite the investigation of other complex models, the simple concepts of these models accelerate the feasibility of the implementation of reverse osmosis for different types of systems and variety of industries. Briefly, an extensive review of these mathematical models is conducted by collecting more than 70 examples from literature in this study. In addition, this review has covered the improvement of such models to make them compatible with multi-component systems with consideration of concentration polarization and solvent-solute-membrane interaction.

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“…Fukuda [4,5] developed the phenomenological equations in the system of KCl-sucrose mixed solution. When the transport rate of sucrose was negligible small(cr = 1) , the equations became:…”

Section: Jsmentioning

confidence: 99%

“…Js = CsJv(l-a s )+coA7r s (5) where Jv is water flow, Lp is the filtration coefficient, G s and o : are the reflection coefficient of salt and sucrose , A7i s and Aft, are osmotic pressure of salt and sucrose , a is the salt permeability and Cs is the average concentration, AP is hydrostatic pressure. Theresults show that water flows through charged mosaic membrane caused by KG diffusion, and osmotic flow of water caused by sucrose were additive.…”

Section: Jsmentioning

confidence: 99%

Preparation and Transport Model of Charge-Mosaic Membrane

Zhang

Liu

Ren

et al. 2004

Frontiers on Separation Science and Technology

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The charge-mosaic membrane is mainly used for separating electrolytes and organics with low molecular weight. The transport mechanism model, fabrication method, the research progresses and the frontiers of the charge-mosaic membrane in last twenty years were briefly introduced in this paper. Some transport models were recommended such as the circulating circuit model, the nonequilibrium thermodynamic model and Friction model. Essential methods for preparing charge-mosaic membranes, such as the multi-block copolymers, graft modifications, interfacial polymerization and co-polymer blending, etc., were elaborated in detail. Future research of the membrane would concentrate on how to increase capacities and control ratio for anion-and cation-exchange groups, and reinforce the study on ions transfer mechanism, membrane characterization and its industrial applications.

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KCl transport mechanism across charged mosaic membrane in KCl–sucrose mixed system

Cited by 16 publications

References 12 publications

Electrolyte dialysis using charge-mosaic membranes

Electrolyte dialysis using charge-mosaic membranes

Scope and limitations of the irreversible thermodynamics and the solution diffusion models for the separation of binary and multi-component systems in reverse osmosis process

Preparation and Transport Model of Charge-Mosaic Membrane

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