Equilibrium of ion exchange of calcium, magnesium and potassium for proton on fibrous carboxylic ion exchanger
https://doi.org/10.29235/1561-8331-2021-57-2-135-143
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.
About the Authors
V. S. Soldatov
Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Vladimir S. Soldatov – Academician, D. Sc. (Chemistry), Professor, Chief Researcher
13, Surganov Str., 220072, Minsk
N. V. Vonsovich
Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Natalya V. Vonsovich – Junior Researcher
13, Surganov Str., 220072, Minsk
T. A. Korshunova
Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Tatyana A. Korshunova – Ph. D. (Chemistry), Senior Researcher
13, Surganov Str., 220072, Minsk
References
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).
6. Soldatov V., Pawlowski L., Shunkevich A., Wasag H. New materials and technologies for environmental engineering. Part I.Syntheses and structure of ion exchange fibers. Lublin, Monografie Polska Akademia Nauk, 2004. 127 p.
7. Soldatov V., Piorishkina N. G., Horoshko R. P. Ion Exchange Soils. Minsk, Nauka i Tehnika Publ., 1978. 270 p. (in Russian).
8. Soldatov V. S., Shunkevich A. A., Elinson I. S., Johann J, Iraushek H. Chemically active textile materials as efficient means for water purification. Desalination, 1999, vol. 124, pp. 181–192. https://doi.org/10.1016/s0011-9164(99)00103-4
9. Greenleaf J. E., Sengupta A. K. Environmentally benign hardness removal using ion exchange fibers and snowmelt. Environmental Science & Technology, 2006, vol. 40, no. 1, pp. 370–376. https://doi.org/10.1021/es051702x
10. Orlovskaya L. А. Sorption concentration of the heavy metal ions in analysis of natural and waste waters. Zdorov’e i okruzhayushchaya sreda [Health and Environment], 2006, no. 7, pp. 328–330 (in Russian).
11. Shataeva L. K., Kuznetsova N. N., Elkin G. E. Carboxylic Ion Exchangers in biology. Leningrad, Nauka Publ., 1979. 280 p. (in Russian).
12. Libinson G. S. Physical Chemical Properties of Carboxylic Ion Exchangers. Moscow, Nauka Publ.,1969. 140 p. (in Russian).
13. Muraviev D., Noguerol Y., Valiente M. Separation and concentration of calcium and magnesium from sea water by carboxylic resins with temperature-induced selectivity. Reactive and Functional. Polymers. 1996, vol. 28, no. 2, pp. 111–126. https://doi.org/10.1016/1381-5148(95)00046-1
14. Ranjih H., Lewis M. J., Maw D. Production of calcium – reduced milks using ion exchange. Journal of Dairy Research, 1999, vol. 66, no. 1, pp. 139–144. https://doi.org/10.1017/s0022029998003276
15. Soldatov V. S. Potentiometric titration of ion exchangers. Reactive and Functional Polymers. 1988, vol. 38, pp. 73– 112. https://doi.org/10.1016/s1381-5148(98)00018-2
16. Shahno D. V, Soldatov V. S. Preparation of ion exchange soils based on weak dissociating fibrous ion exchangers. Vestsi Natsyyanal’nai akademii navuk Belarusi. Seryya khimichnykh navuk = Proceedings of the National Academy of Sciences of Belarus. Chemical Series, 2018, no. 3, pp. 263–273 (in Russian). https://doi.org/10.29235/1561-8331-2018-54-3-263-273
17. Soldatov V. S., Davlyud D. N., Bezyazychnaya T. V., Vorobieva E. V., Kosandrovich E. G., Vorobiev P. D. State of ions and water molecules in the water salt solutions of polyacrylamide and co-polymer of “acrylamide-acrylic acid Na /K salt”. Doklady Natsional’noy akademii nauk Belarusi = Doklady of the National Academy of Sciences of Belarus. 2019, vol. 63, no. 6, pp. 695–703 (in Russian). https://doi.org/10.29235/1561-8323-2019-63-6-695-703
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