Abstract—
The possibility of using readily available materials—Tyul’gansk lignite, Tisul’sk lignite (and its naturally oxidized form), humic acids, and coal residues after humic-acid extraction—in the sorption of copper, cobalt, manganese, and zinc cations from aqueous solutions is considered. Their effectiveness as sorbents is assessed by means of IR Fourier spectroscopy, ESR, Raman scattering, and CP/MAS 13C NMR analysis. The sorptional properties of humic acids are changed on modification by means of hydrogen peroxide and n-butanol, which alter their functional composition. Oxidation by hydrogen peroxide improves the sorptional properties, while alkylation with butanol impairs those properties. The sorbents are most selective for copper cations and least selective for manganese cations.
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ACKNOWLEDGMENTS
Financial support was provided under the program of state support for the Institute of Coal Chemistry and Materials Science, Federal Research Center of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences (project AAAA-A17-117041910148-9). The research was conducted using equipment at the Center of Collective Use of the Federal Research Center of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences.
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Translated by B. Gilbert
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Zherebtsov, S.I., Malyshenko, N.V., Votolin, K.S. et al. Sorption of Metal Cations by Lignite and Humic Acids. Coke Chem. 63, 142–148 (2020). https://doi.org/10.3103/S1068364X20030096
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DOI: https://doi.org/10.3103/S1068364X20030096