Low-frequency impedance of an ion-exchange membrane system

Sistat, Philippe; Kozmai, Anton; Pismenskaya, Natalia; Larchet, C.; Pourcelly, G.; Nikonenko, Victor

doi:10.1016/j.electacta.2008.04.041

Cited by 98 publications

(67 citation statements)

References 45 publications

(82 reference statements)

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“…The measuring set-up was made from plexiglass and consisted of 6 separate compartments with a solution volume of 2 dm 3 [28]. The central membrane, …”

Section: Electrical Resistancementioning

confidence: 99%

“…Recently, also the application of ion exchange membranes for energy generation from e.g. the mixing of fresh and salt water, from wastewater in microbial fuel cells or in other types of fuel cells such as PEM fuel cells or direct methanol fuel cells gained more attention [15,[20][21][22][23][24][25][26][27][28][29][30][31][32].…”

Section: Ion Exchange Membranesmentioning

confidence: 99%

“…In this study, the authors observed that heterogeneous transport, which we believe is the transport of ionic charge from the solution phase through the double layer to the membrane matrix, strongly depends on solution mixing and that the diffusion boundary layer can be totally eliminated by solution stirring. Although we believe that the resistance of this interfacial ionic charge transfer on the membrane surface can not be influenced by solution mixing, because ions are transferred through the double layer which thickness is in the order of a few nanometers only (the Debye length) [19,[26][27][28] and that the resistance of the diffusion boundary layer cannot be totally eliminated, but only minimized by increased solution flow rate, because this layer is in the micrometer range, the work clearly shows the strong potential of EIS for ion exchange membrane characterization.…”

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confidence: 99%

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Mass transport in reverse electrodialysis for sustainable energy generation

Długołęcki

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“…The measuring set-up was made from plexiglass and consisted of 6 separate compartments with a solution volume of 2 dm 3 [28]. The central membrane, …”

Section: Electrical Resistancementioning

confidence: 99%

Section: Ion Exchange Membranesmentioning

confidence: 99%

mentioning

confidence: 99%

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Mass transport in reverse electrodialysis for sustainable energy generation

Długołęcki

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“…A typical description of a membrane-electrolyte interface recognized by many authors (85,92,111,112) is shown in Figure 21. When an electric current is applied to a membrane-solution system, a concentration gradient is created near the membrane surface.…”

Section: Chronopotentiometrymentioning

confidence: 99%

“…The most severe condition occurs when the applied current density is high enough to deplete ions at the membrane surface (C=0) at a given time. In this condition, Equation 22 may be rearranged for the well-known Sand Equation (74,111,112) (Equation 23). …”

Section: = ̅mentioning

confidence: 99%

Treatment of a cyanide-free copper electroplating solution by electrodialysis: study of ion transport and evaluation of water and inputs recovery

SCARAZZATO¹

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The two most common commercial copper baths are the acid sulfate copper bath and the alkaline cyanide copper bath. Alkaline copper baths are mostly used to coat parts with complex geometry and to avoid galvanic deposition when depositing a metal on a less noble substrate. Because of the toxicity of cyanide compounds, alternative baths have been developed using different complexing agents. The starting point of the present study is a cyanide-free strike bath developed for copper plating on Zamak substrates developed by the Institute for Technological Research of the State of São Paulo/ Brazil. The replacement of a raw material such as cyanide must be economically advantageous and technically feasible. Therefore, this study intended to propose an alternative to the treatment of liquid wastes from the mentioned bath, aiming at simultaneous water reclamation and chemicals recovery in a closed system. The electrodialysis membrane separation process was studied, using a laboratoryscale system operating with a synthetic solution simulating the rinsing waters from the HEDP-based bath. The feasibility of the technique was evaluated by analyzing operational parameters such as ion extraction, demineralization rate, concentration rate, current efficiency for each anionic specie and average energy consumption. Because HEDP is a chelating agent, the transport of Cu(II)-HEDP chelates through anion-exchange membranes was also evaluated by means of electrochemical methods. Chronopotentiometric and current-voltage curves were constructed for different model solutions containing the same compounds as the original bath. A relation between the presence of chelates in the solutions and the fixed ion exchange group could be established. Lastly, deposition tests were performed using electrolytes containing the recycled inputs and the characteristics of the coatings were analyzed. The results showed that an electrodialysis stack using strongly basic anion-exchange membranes was suitable to produce treated solutions and a concentrate containing the ions from the bath. The concentrate could be added to the copper bath to compensate eventual drag-out losses without affecting the quality of the coatings. Thus, the application of electrodialysis was shown to be a feasible alternative for recovering water and inputs from the evaluated solution, reducing the wastewater generation and saving natural resources.

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Membrane Characterization

Bernstein

Kaufman

Freger

2013

Encyclopedia of Membrane Science and Technology

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This article presents an overview of currently used principles, materials, and instrumentation for characterization of membranes. This includes conventional and advanced methods for examination of chemical and physical characteristics, morphology and porosity of membranes, transport characteristics for neutral solutes and electrolytes, surface properties, and propensity to fouling. The emphasis is given to modern techniques with highest resolution and sensitivity. The most important types of instruments and model systems used in membrane characterization are explained and illustrated by representative examples. Aspects specific to characterization of dense composites for pressure‐driven and gas separations, porous membranes, and ion‐selective membranes are discussed in detail.

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Low-frequency impedance of an ion-exchange membrane system

Cited by 98 publications

References 45 publications

Mass transport in reverse electrodialysis for sustainable energy generation

Mass transport in reverse electrodialysis for sustainable energy generation

Treatment of a cyanide-free copper electroplating solution by electrodialysis: study of ion transport and evaluation of water and inputs recovery

Membrane Characterization

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