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 ?
Cation exchange therefore occurs in an environment of constant anionic charge, with the anion species that of the absorbed solution.
2] (the proportion of variance accounted for by linear regression) CEC, Cation exchange capacity.
According to Anderson and Sposito (1991), besides variable negative charges, the caesium-adsorption method measures only the permanent negative surface charges that can make part of cation exchange reactions (i.
Comparison of pH, organic matter, cation exchange capacity (H + Al), macro and micronutrient contents of arboreal termite nests consumed by Brotogeris chiriri and ground soil.
Cation exchange sites in SOM arise from the dissociation of weakly acidic functional groups, particularly carboxylic and phenolic groups (Thomas and Hargrove 1984).
Basically previous researchers focused on soil contamination by different chlorate, chlorides, heavy metals, oil using different electrical methods without considering other soil properties such as soil pH, cation exchange capacity (CEC), soil salinity and electrolyte concentration.
Most have been focused on investigating SMCs' electrokinetic properties, such as zeta potential, cation exchange capacity, electrical conductivity, etc; however, no comprehensive study has been found comparing SMC contact angles and consistency limits.
Initial soil samples using composite sampling technique made of subsamples, thoroughly mixed together were collected from the replicates of treatments and control 24-hour after treatment and analysized on total petroleum hydrocarbon (TPH), pH, total organic carbon (TOC), nitrate content, phosphate content, soil conductivity and soil cation exchange capacity as assessment parameters.
Separation is achieved by utilizing differences in ionic interactions between the cation exchange group on the column resin surface and the various hemoglobins and hemoglobin components.
Because of easy availability of the different rubbers in latex form and swelling capability of the clay in the water, the mixing of the latex with the layered silicates (having high cation exchange capacity) followed by coprecipitation (coagulation) is a promising route to produce rubber nanocomposites.
Results showed that the organic matter, available phosphorous, cation exchange capacity, microbial respiration and mean weight diameter (MWD) decreased.