ion exchange

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Related to Ion exchange membrane: Cation exchange membrane

an·i·on ex·change

(an'ī-on eks-chānj'),
The process by which an anion in a mobile (liquid) phase exchanges with another anion previously bound to a solid, nonmobile, positively charged phase, the latter being an anion exchanger. For example, the process takes place when Cl- is exchanged for OH- in desalting. The reaction is Cl- (in solution) + (OH- on anion exchanger+) → (Cl- on anion exchanger) + OH- (in solution); in combination with the cation exchange, NaCl is removed from solution. Anion exchange may also be used chromatographically, to separate anions, and, medicinally, to remove an anion (for example, Cl-) from gastric contents or bile acids in the intestine.

ion-ex·change chro·ma·tog·ra·phy

(ī'on-eks-chānj' krō'mă-tog'ră-fē)
Chemical investigation in which cations or anions in the mobile phase are separated by electrostatic interactions with the stationary phase.
See also: anion exchange, cation exchange

cat·i·on ex·change

(kat'ī-on eks-chānj')
The process by which a cation in a liquid phase exchanges with another cation present as the counter-ion of a negatively charged solid polymer (cation exchanger). Cation exchange may be used chromatographically, to separate cations, and medicinally, to remove a cation.
See also: anion exchange

an·i·on ex·change

(an'ī-on eks-chānj')
The process by which an anion in a mobile (liquid) phase exchanges with another anion previously bound to a solid, positively charged phase, the latter being an anion exchanger. Anion exchange may also be used chromatographically, to separate anions, and medicinally, to remove an anion (e.g., Cl-) from gastric contents or bile acids in the intestine.

ion exchange

A reversible chemical reaction in which ions in a solution are replaced by others with like charge from an insoluble solid such as an ION EXCHANGE RESIN. The process is used for softening hard water, purifying sugar, separating radioactive isotopes and for other purposes.
References in periodicals archive ?
Extensive analysis of the ion exchange membrane market trends and shares from 2018 to 2026 to identify market opportunities and analyze industry developments
So thin film of ion exchange membrane, because of mechanical and chemical weakness, resulted in unreliability and inapplicability of the membrane to make big commercial and industrial cells, despite the easy ability to produce and setting.
Kim WS, Kim SO, Kim KW (2005) Enhanced electrokinetic extraction of heavy metals from soils assisted by ion exchange membranes. Journal of Hazardous Materials 118, 93-102.
To obtain the optimum performance of the electrolytic cell, PFSA and PFCA were combined to prepare two-layer ion exchange membranes. Numerous patents [13-15] have reported on the laminating method, the processing parameters and the excellent performance of the composite membrane in the electrolytic cell [16-18], However, during prolonged cell operation, particularly under abnormal conditions (such as failure of water feed to cathode chamber, loss of electrical power, interruption or reduced brine feed to the cell, etc.), the composite membranes were prone to delaminate and form water bubbles between the two layers, which will increase voltage and reduce current efficiency in electrolysis [19, 20].
In addition, our proposed membranes for the IPMC have higher WUP than those of the new ion exchange membranes proposed by other research groups [9-12], excluding the membranes proposed by Han el al.
Ion exchange membrane chromatography media have proved to be valuable purification tools, and the new Membrane [EX technology can reduce bottlenecks, and costs, while improving throughputs in downstream processing of antisense oligonucleotides.
Kazacos, "Water transport study across commercial ion exchange membranes in the vanadium redox flow battery," Journal of Membrane Science, vol.
[3.] Charge and mass transport in the phenol-2,4-disulfonic acid-polyvinyl alcohol ion exchange membranes studied by pulsed field gradient NMR and impedance spectroscopy / V.I.
The new design, comprising two ion exchange membranes and two flanking regenerate channels, allows for operation at high pressures not feasible with current suppressors.
"This technology has two main forms--one that does not use membranes and another that uses ion exchange membranes like RED and that tends to perform better," says Schaetzle.
We evaluated total C, total N, C : N ratio, Olsen extractable P, sulfate S, and pH from soil samples and inorganic N (N[O.sub.3.sup.-] + N[H.sub.4.sup.+]) from ion exchange membranes. We sought to quantify potential changes in soil nutrient availability due to the elimination of nutrient uptake by masticated trees relative to the effects of soil cover types including tree mounds and masticated-tree debris.
The technological difficulties arise due to fouling of ion exchange membranes mainly due to deposition of organic/inorganic molecules (sugars, proteins, [Ca.sup.2+], [Mg.sup.2+], etc.).