ion exchange

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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 ?
Caption: Figure 3: Raman spectra set obtained for the CdS: Cu films obtained by ionic exchange process in aqueous solution.
Ale-Cellular HbAlc control with intact red-blood cells (RBCs) is appropriate for immunoassay and ionic exchange HPLC methodologies and is assayed for the Bio-Rad D-10 and Variant/II; Ortho-Clinical Diagnostics VITROS 5,1 FS; Arkray Menarini ADAMS Ale HA-8160; Beckman Coulter Synchron CX/LX and Unicel DxC 600/800 Synchron; Siemens Healthcare Diagnostics, Dimension; Roche Diagnostics Cobas INTEGRA; and the Tosoh G7/G8 and A1c 2.2 Plus.
The modified zeolite was prepared by ionic exchange with molybdenyl ions.
Introduction to Unit Operations: Fundamental Concepts; Unit Systems: Dimensional Analysis and Similarity; Introduction to Transport Phenomena; Molecular Transport of Momentum, Energy, and Mass; Air-Water Mixtures; Rheology of Food Products; Transport of Fluids through Pipes; Circulation of Fluid through Porous Beds: Fluidization; Filtration; Separation Processes by Membranes; Thermal Properties of Food; Heat Transfer by Conduction; Heat Transfer by Convection; Heat Transfer by Radiation; Thermal Processing of Foods; Food Preservation by Cooling; Dehydration; Evaporation; Distillation; Absorption; Solid-Liquid Extraction; Adsorption and Ionic Exchange; Problems.
[USPRwire, Thu Jan 17 2019] The expanding database of Market Research Reports Search Engine (MRRSE) has been recently updated by the addition of a new study which is titled as " Global Ionic Exchange Based Liquid Nuclear Waste Treatment Market Innovations during the Period Until 2025 ".
The $2.2 million plant has been discussed and drawn up but no final decision has been made on what type of water treatment system to go with, ionic exchange or reverse osmosis should be brought into the contract with an outside water supplier such as the Manor Township or Pennsylvania-American Water company.