Oksana MYAKUSH1, Leonid SYSA2
1National Forestry University of Ukraine, Generala Chuprynky Str., 103, 79057 Lviv, Ukraine, e-mail: oksmyakush@gmail.com
2Lviv State University of Life Safety, Kleparivska Str., 35, 79007 Lviv, Ukraine, e-mail: teacher_leon@ukr.net
DOI: https://doi.org/10.37827/ntsh.chem.2020.60.055
FEATURES OF EXTRACTION OF COPPER, ZINC AND NICKEL IONS FROM AQUEOUS SOLUTIONS BY NATURAL SORBENTS, ACTIVATED MICROWAVES
The article is a continuation of a series of scientific works of the authors on the study of the influence of microwave irradiation on the sorption parameters of natural sorbents in the processes of purification of natural and wastewater. Using the atomic absorption method, the sorption ability of the natural sorbent clinoptilolite (zeolite type of structure) to remove Copper, Zinc and Nickel ions from aqueous solutions was studied. It was found that different variants of microwave activation of this mineral (series «Nat», «Stim» and «DIR») lead to a significant increase in the sorption capacity of clinoptilolite by ions of these heavy metals. It is shown that in comparison with similar activation schemes of another natural sorbent of bentonite (clay material), the improvement of sorption parameters of clinoptilolite with respect to heavy metals is not as significant as in the case of bentonite. It is confirmed that in almost all solutions the deposition of heavy metals on clinoptilolite occurs according to the Langmuir or Langmuir-Freundlich model. A similar situation was observed in previous works of the authors on the deposition of heavy metals on bentonite. Using scanning electron microscopy, energy dispersion spectroscopy and X-ray phase analysis, it was found that the deposition of heavy metals on both bentonite and clinoptilolite occurs not only in the form of monolayers of hydrated ions in sorbent micropores (classical model), but also in the form of individual compounds. metals. It has been suggested that the action of microwaves on these sorbents in aqueous solutions improves the structure of their micropores and affects the surface charge, so some parts of the adsorbent become active centers of crystallization of new phases - heavy metal compounds. During adsorption of heavy metal by natural bentonite or clinoptilolite, low-energy adsorption centers predominate, whereas in the case of microwave-irradiated samples of these sorbents, the experimental data correspond to a symmetric quasi-Gaussian distribution of adsorption energy where low- and high-energy regions are present. This fact indicates that electromagnetic treatment stimulates the formation of new adsorption centers.
Keywords: heavy metals, zeolite, bentonite, microwave activation.
References:
-
1. Zapolsky A. K., Mishkova-Klimenko M. A., Astrelin I. M. et al. Physico-chemical bases of wastewater treatment technology (Libra, Kyiv, Ukraine, 2000) (in Ukrainian).
2. Tarasevich Yu. I., Polyakov V. E., Penchov V. Zh. et al. Ion-exchange properties and structural features of clinoptilolites of various deposits. Chemistry and water technology. 1991. Vol. 13(2). P. 132–140 (in Ukrainian).
3. Kivva F.V., Gorobets V.N., Golovko M.I. et al. New technologies for the processing of sorbents. News of Energetics. 2003. Vol. 1–2. P. 26–31 (in Ukrainian).
4. Kivva F. V., Gorobets V. N., Golovko M. I. et al. Device for sorbent regeneration by an electromagnetic field. Sci. innov.2010. Vol. 6(3). P. 12–19 (in Ukrainian).
5. Sysa L. V., Stepova K. V., Petrova M. A. et al. Microwave-treated bentonite for removal of lead from wastewater. Voprosy khimii i khimicheskoi tekhnologii. 2019(5). Р. 126–134. (https://doi.org/10.32434/0321-4095-2019-126-5-126-134).
6. Kontsur A., Sysa L., Petrova M. Investigation of copper adsorption on natural and microwave-treated bentonite. EEJET. 2017. Vol. 6 (90). P. 26–32. (https://doi.org/10.15587/1729-4061.2017.116090).
7. Sysa L., Myakush O., Kontsur A. Peculiarities of the influence of microwave radiation on the process of bentonite sorption of copper ions from concentrated aqueous solutions. Proc. XVII conf. "Lviv Chemical Readings 2019". 2019. P. Д1. (in Ukrainian).
8. Sysa L. V., Rudik Y. I., Kontsur A. Z. Analysis of isotherms of adsorption of zinc ions on bentonite after treatment with ultrahigh-frequency radiation. Ecological safety. 2017. Vol. 2(24). P. 45–51. (in Ukrainian).
9. Kontsur A. Z., Rudyk Y. I., Sisa L. V. et al. Influence of microwave irradiation on the process of sorption of zinc ions by bentonite from concentrated aqueous solutions. Ecological safety. 2018. Vol 1(25). P. 38–45 (https://doi.org/10.30929/2073-5057.2018.1.38-45) (in Ukrainian).
10. Sysa L. V., Shevchuk L. P., Kontsur A. Z. Improvement of sorption parameters of Nickel ions by bentonite due to irradiation with ultrahigh-frequency waves. Phys. Chem. Solid St. 2017. Vol. 18(4). P. 431–437 (https://doi.org/10.15330/pcss.18.4.437).
11. Kontsur A. Z., Sysa L. V., Shevchuk L. P. Use of microwaves for activation of bentonite in the processes of sorption of Nickel ions from concentrated aqueous solutions. Phys. Chem. Solid St. 2018. Vol. 19(2). P. 191–196 (https://doi.org/10.15330/pcss.19.2.191-196).
12. Vasylechko V. O., Cryshchouk G. V., Lebedynets L. O. et al. Adsorption of Copper on Transcarpathian Сlinoptilolite. Adsorpt. Sci. Technol. 1999. Vol. 17(2). P. 125–134. (https://doi.org/10.1177/026361749901700206).
13. Kinniburgh D. General purpose adsorption isotherms. Environ. Sci. Technol. 1986. Vol. 20(9). P. 895–904. (https://doi.org/10.1021/es00151a008).
14. Goldstein J., Newbury D.E., Joy D.C. et al. Scanning Electron Microscopy and X-ray Microanalysis: Third Edition (Springer, USA, 2003).(https://doi.org/10.1007/978-1-4615-0215-9).
15. Pecharsky V. K., Zavalij P. Yu. Fundamentals of powder diffraction and structural characte-rization of materials (Springer, USA, 2005).
16. Berthold H., Born J., Wartchow R. et al. The crystal structure of Copper(I) sulfate Cu2SO4. Z. Kristallogr. 1988. Vol. 183. P. 309–318. (https://doi.org/10.1524/zkri.1988.183.14.309).
17. Tran H. N., You S.-J., Hosseini-Bandegharaei A. et al. Mistakes and inconsistencies regarding adsorption of contaminants from aqueous solutions: A critical review. Water Res. 2017. Vol. 120. P. 88–116. (https://doi.org/10.1016/j.watres.2017.04.014).
18. Giles C., Smith. D., Huitson A. A. General treatment and classification of the solute adsorption isotherm. I. Theoretical. J. Colloid Interface Sci. 1974. Vol. 47(3). P. 755–765. (https://doi.org/10.1016/0021-9797(74)90252-5).
How to Cite
Myakush O., Sysa L. FEATURES OF EXTRACTION OF COPPER, ZINC AND NICKEL IONS FROM AQUEOUS SOLUTIONS BY NATURAL SORBENTS, ACTIVATED MICROWAVES Proc. Shevchenko Sci. Soc. Chem. Sci. 2020 Vol. LX. P. 55-67.