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Proceedings of the Voronezh State University of Engineering Technologies

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Ion-exchange concentration of inorganic anions from aqueous solution

https://doi.org/10.20914/2310-1202-2016-4-222-227

Abstract

Monitoring of natural waters in the present time - consuming process, the accuracy of which is influenced by many factors: the composition of water, the presence of impurities and "interfering" components. The water sample preparation process includes the step of concentration and separation of ions determined. The most versatile, efficient, and frequently used method is the concentration of inorganic anions from aqueous solutions by ion exchanger, which can optimize the composition of water to the optimal for identification and quantitative determination of anions. The characteristics of sorption chloride, nitrate and sulfate ions of basic anion exchange resin AВ-17 and Purolite A430 were compared in the article. The constants of protolysis of ion exchangers both AB 17 and Purolite A430 are the same and equal 0.037 ± 0,002. The value of total capacity (POE) Purolite A430 was 4.3 mmol/g, AB 17 – 3.4 mmol/g. The studied ion exchangers have the same type of ionic groups – quaternary ammonium, but their number and denotes differ. The number of quaternary ammonium groups is higher in Purolite A430, respectively the number of absorbed anions of these ion exchanger is higher. The values of dynamic exchange capacity (DOE) of ion exchanger Purolite A430 is higher than these values of AB-17 and equal to 1.48 ± 0.03 mmol / dm3 for chloride ion, 1.50 ± 0.03 mmol / dm3 for nitrate ion, 1.62 ± 0.03 mmol / dm3 for sulfate ion. The values of the POE and DOE of anion-exchange resins Purolite A430 and AV-17 and the characteristics of the individual sorption of chloride, nitrate, sulfate ions showed an advantage of the Purolite for the concentrationing of anions. It is found that times of anions sorption from triple-anion solutions by Purolite A430 are significantly different for different anions, and these times are close for anion-exchanger AV-17. It proves the possibility of quantitative separation and concentration by anion-exchanger Purolite A430.

About the Authors

L. P. Bondareva
Voronezh state university of engineering technologies

candidate of chemical sciences, associated professor, physical and analytical chemistry department,

Revolution Av., 19 Voronezh, 394036



E. N. Kunakhova
Voronezh state university of engineering technologies

student, physical and analytical chemistry department, 

Revolution Av., 19 Voronezh, 394036



A. V. Nikylina
Voronezh state university of engineering technologies

candidate of chemical sciences, associated professor, physical and analytical chemistry department, 

Revolution Av., 19 Voronezh, 394036



References

1. 1 [Electronic resource]: Access mode: http://smoly.ru/anionit-av-17-8-harakteristiki.html Free. – Title screen. – English.

2. 2 [Electronic resource]: Access mode: http://www.purolite.com/index Free. – Title screen. – English.

3. 3 GOST 31940-2012. Drinking water. Methods for determination of sulphate. Introduced 01.01.2014. M.: Interstate standards: IEC publ standards, 2014. 16 p.

4. 4 Mathematical model of the dynamics of sorption in a layer of ion-exchanger / T.S. Kornienko, E.A. Zagorulko, L.P. Bondareva [et al.] // Sorption and chromatographic processes. 2015. R. 15, №. 6. P. 895-899.

5. 5 Rieman W., Walton H. F. Ion Exchange in Analytical Chemistry: International Series of Monographs in Analytical Chemistry. – Elsevier, 2013.

6. 6 Ganesan P., Kamaraj R., Vasudevan S. Application of isotherm, kinetic and thermodynamic models for the adsorption of nitrate ions on graphene from aqueous solution //Journal of the Taiwan Institute of Chemical Engineers. – 2013. – Т. 44. – №. 5. – С. 808-814.


Review

For citations:


Bondareva L.P., Kunakhova E.N., Nikylina A.V. Ion-exchange concentration of inorganic anions from aqueous solution. Proceedings of the Voronezh State University of Engineering Technologies. 2016;(4):222-227. (In Russ.) https://doi.org/10.20914/2310-1202-2016-4-222-227

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ISSN 2226-910X (Print)
ISSN 2310-1202 (Online)