Ion exchange is a process involving the adsorption of one or several ionic species accompanied by the simultaneous desorption (displacement) of one or more other ionic species.
Reversible chemical reaction usually between a solid and a liquid in which ions may be interchanged.
An adsorption process in which one ion is exchanged for another ion of like charge. There is an equivalence of exchanged charge.
A method of water softening where hardness causing ions are exchanged with sodium ions; also effective in removing many inorganic contaminants such as nitrates, copper, and lead; and treating aesthetic water problems. Back to the top
a process in which ions are exchanged between a solution and an insoluble (usually resinous) solid; widely used in industrial processing
A technique of separating materials by reversible interchange between ions of like charge.
The exchange of nutrients in the soil from clay particles and organic matter to solution to plant roots.
A water treatment process. An electric charge is used to remove charged particles from solution.
Process in which a solution containing soluble ions to be removed is passed over a solid ion-exchange medium, which removes the soluble ions by exchanging them with labile ions from the surface of the column. The process is reversible so that the trapped ions can be collected (eluted) and the column regenerated.
the process whereby plant elements from the nutrient solution are absorbed by plant roots
Ion (anion or cation) exchange systems soften hard water by removing the minerals (calcium and magnesium) that cause hardness. Ion exchange units also remove iron, manganese and many heavy metals. The hard water is pumped through a tank containing an exchange resin. Sodium on the resin replaces the hardness minerals. The sodium remains in a soluble form in the softened water.
A reversible water treatment process. A charged polymer exchanges Na+, H+, Cl-, or OH- for other ions in a solution.
A pretreatment process in desalination plants. An electrical charge is used to remove charged particles from solution.
a process in water treatment used to remove chemicals, especially those causing hardness. The ion exchange resin is composed of small plastic beads which have sodium ions on the surface. When untreated water is passed through the resion, the hardness ions (calcium and magnesium) exchange with the sodium ions on the resin, reducing the hardness of the water.
A treatment method used to remove and exchange ions from water. See technology description of Ion Exchange.
The reversible interchange of ions between a liquid and solid, with no substantial structural changes in the solid.
Where unwanted ions are transferred to the resin in the softener, and wanted ions are left in the water supply.
A process in which ions are preferentially adsorbed from a solution for equivalently charged ions attached to solid resin particles.
A reversible interchange of ions between a liquid and a solid without causing any significant change in the structure of the soild.
A chemical reaction involving the exchange of hydrated ions in a solid for similarly charged but different element ions in solution.
The process of purifying water by removing the ionized salts from solution. Most commonly, the process of ion exchange is used to achieve this by replacing hydrogen ions for cation impurities and hydroxyl ions for anion impurities.
Passing wastewater through resin beds to absorb metal ions. Used to recover aluminum, arsenic, cadmium, hexavalent and trivalent chromium, cyanide, gold, iron, lead, manganese, nickel, selenium, silver, tin, and zinc.
A reversible process in which ions are released from an insoluble permanent material in exchange for other ions in a surrounding solution; the direction of the exchange depends upon the affinities of the ion exchanger for the ions present and the concentrations of the ions in the solution.
a water softening process in which hardness ions (calcium and magnesium) are exchanged for sodium or potassium ions
A reversible chemical process in which ions from an insoluble permanent solid medium (the "ion exchanger"--usually a resin) are exchanged for ions in a solution or fluid mixture surrounding the insoluble medium.
A reversible process by which ions are interchanged between solids and a liquid. These ions exist throughout the solution and act almost independently.
Reversible exchange of ions adsorbed on a mineral or synthetic polymer surface with ions in solution in contact with the surface. A chemical process used for recovery of uranium from solution by the interchange of ions between a solution and a solid, commonly a resin.
Ion exchange is a process in which ions are exchanged between a solution and an ion exchanger, an insoluble solid or gel. Typical ion exchangers are ion exchange resins, zeolite, montmorillonite, clay, and humus. Ion exchangers are either cation exchangers for positively charged cations or anion exchangers for negatively charged anions.