cation exchange

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Related to cation-exchange resin: anion exchange resin

cation exchange

[′kat‚ī·ən iks′chānj]
(chemistry)
A chemical reaction in which hydrated cations of a solid are exchanged, equivalent for equivalent, for cations of like charge in solution.
References in periodicals archive ?
Table 5 shows resulted sizes of static exchange capacity and value of factor of distribution; they provide quantitative characteristic of equilibrium distribution of ions [Ca.sup.2+] between solutions and cation-exchange resin.
From Table 5 data it is visible that received cation-exchange resin does not concede on sorption ability to polymerized cation-exchange resin KF-1.
The constancy of values of factors of diffusion confirms limiting role of diffusion in particles of cation-exchange resin at an exchange of ions [Na.sup.+] [right arrow] [Ca.sup.2+].
Heating of phosphate cation-exchange resin in the H-form in water within 30 hours at temperature of boiling of water slightly reduced size of exchange capacity.
There was interest to study such properties of received phosphate cation-exchange resin as sorption ability to ions of copper, nickel, calcium, sodium, cobalt and uranyl; to study influence of various factors on process sorption of these cations, and also their mechanism of sorption with application of the IR-spectroscopical analysis.
Studying of influence of the ionic form of cation-exchange resin on absorption of examinees cation-exchange resins showed that Na-form ion-exchange resin (Table 7) possesses larger sorption ability in comparison with the hydrogen form.
The data (Tables 7 and 8) testify that received cation-exchange resin possesses enough high sorption and desorption ability to ions of examined metals.
Macroporous strong acidic cation-exchange resins, derived by sulfonation of acetone-washed or without acetone-washed St-DVB base copolymer synthesized by using n-heptane/toluene as diluents, show no difference with respect to ion-exchange capacity, leachable organics, and other characteristics.