Affiliation:
1. Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus
Abstract
By the method of potentiometric titration of a fibrous aminocarboxylic polyampholyte with a predominant content of carboxyl groups, the equilibrium of the cation exchange of calcium, magnesium, and potassium ions for a hydrogen ion was studied. Due to the low solubility of calcium and magnesium hydroxides in these cases, titration was carried out by Ca(OH)2 and Mg(OH)2, which are formed in solution upon contact with the H-form of the ion exchanger оf increasing portions of solid CaO and MgO. This made it possible to obtain titration curves in a wide range of pH and calcium and magnesium chlorides concentration (0–0.1 eq./L). The dependences of the swelling of ion exchangers on the neutralization degree with the bases of the studied cations are obtained. The coefficients of ion-exchange equilibria are calculated. It was found that the swelling of the ion exchanger is relatively little dependent on its ionic form. The ion exchanger has a higher affinity for calcium than magnesium ion.
Publisher
Publishing House Belorusskaya Nauka
Subject
Inorganic Chemistry,Organic Chemistry,Chemistry (miscellaneous),Analytical Chemistry
Reference17 articles.
1. Zverev M. P. Chemisorption fibers. Moscow, Khimiya Publ., 1981. 191 p. (in Russian).
2. Volf L. A., Emets L. V., Kostrov Yu. A. Fibers with special properties. Moscow, Khimiya Publ., 1980. 240 p. (in Russian).
3. Egava H. Preparation of carboxylic acid type cation exchange fibers. Journal of the Society of Chemical Industry, Japan, 1965, vol. 68, no. 7, pp. 1304–1306.https://doi.org/10.1246/nikkashi1898.68.7_1304
4. Kosandrovich E. G., Soldatov V. S. Fibrous ion exchangers. Ion exchange technology I: theory and materials. London, GB, 2012, pp. 299–371. https://doi.org/10.1007/978-94-007-1700-8_9
5. Ermolenko I. N., Buglov E. D., Liubliner S. I. New fibrous sorbents for medical applications. Minsk, Nauka I Tehnika Publ., 1978. 215p. (in Russian).
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献