cation exchange


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Related to cation exchange: Cation exchange resin, Cation exchange membrane

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). A cation-exchange reaction in removal of the Na+ of a sodium chloride solution is RSO3-H+ + Na+ → RSO3-Na+ + H+ (R is the polymer, RSO3- is the cation exchanger); if this is combined with the anion-exchange reaction, NaCl is removed from the solution (desalting). Cation exchange may also be used chromatographically, to separate cations, and medicinally, to remove a cation, for example, H+, from gastric contents, or Na+ and K+ in the intestine. See: anion 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

cation exchange

The transfer of cations between those in a liquid medium and those in a solid polymer. The polymer is termed the cation exchanger. Cation exchange is used in ion-exchange chromatography and in certain water purifiers.
See also: exchange
References in periodicals archive ?
The experimental data showed that both hydrophobic and cation exchange behaviors are active as a retention mechanism.
Although Brightsmith and Munoz-Najar (2004) found no relationship between soil consumption by Peruvian birds and cation exchange capacity, Gilardi et al.
Once nutrients are removed from soil cation exchange sites, they become available for plant uptake.
Pearson correlation analysis reveals that natural processes such as mineral dissolution/precipitation and cation exchange are dominant factors influencing the groundwater chemistry.
Ni leaching was favored by the lower values of cation exchange capacity and clay percentage of the surface layer.
This is because the association of functional groups when protons are added or generated in the soil eliminates a cation exchange site.
5--chemical tests, including another CEC, EC and PH on samples taken in which the rates of cation exchange capacity CEC)) between 36/14 to 57/1, the amount of electrical conductivity (EC) between 43/92 to 06 / soil PH between 9 and 27/8 to 95/7 is calculated.
These resulted to samples with increased surface area, adsorption capacity, and reduced cation exchange capacity.
Cation exchange capacity was the highest in Haplic Cambisol (Vatin, arable) and reached at about 22 cmol/kg.
Effective cation exchange capacity was significantly reduced in the treatments compared with the control.
Considering that the size of exchange capacity of phosphate cation-exchange resins depends on pH environment and the initial form of ion-exchange groups, there was examined the sorption ability of synthesized cation exchange resin on [Ca.