MODIFIED VERMICULITE OF THE MUGODZHARY DEPOSIT AND ITS SORPTION PROPERTIES

Balgysheva B. Massalimov I. Urakaev F. Sassykova L. Zhakirova N. Boranbayeva G. Dalabayeva N. Azatkyzy S.
2022 University of Chemical Technology and Metallurgy

Journal of Chemical Technology and Metallurgy
2022 #57 Issue 3 533 - 544 pp.

The composition and the sorption properties of vermiculite from Mugodzhary field (Kazakhstan) were studied. The sorption properties of modified vermiculite were investigated under mechano-chemical activation in the presence of acidic sodium phosphate, Na₂HPO₄· 12H₂O. Optimization of the mechano-chemical activation of vermiculite in the presence of Na2HPO4-12H2O was carried out depending on the duration of mechano-chemical activation and the ratio of the mass of the substance to the mass of the balls. It was revealed that the sorption capacity of the vermiculite samples does not change sequentially, which indicates the aggregation of the mixture particles. The highest degree of sorption was shown by the sample treated for 30 min. The results of the experiments showed that the degree of sorption of the activated vermiculite with respect to Mn²⁺ is higher than that of Ni²⁺, Cu²⁺. The results of sorption indicate an improvement in the properties of the sorption capacity during the formation of an amorphous phase when processing vermiculite with Na₂HPO₄ · 12H₂O. Using the methods of atomic absorption analysis, XRD, IR, the effect of additives on the degree of sorption was established: with Na₂HPO₄ · 12H₂O, it grows in the following sequence Mn²⁺ > Ni²⁺ > Cu²⁺ (Mn = 99.8 %, Ni = 99.3 %, Cu = 99.0 %). As a result of the research a new effective sorbent was obtained from natural vermiculite by the mechanical activation in the presence of sodium hydrogen phosphate, Na₂HPO₄l2H₂O.

acid phosphate , mechano-chemical activation , Mugodzhary , sorption properties , vermiculite

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Faculty of Chemistry and Chemical Technology Al-Farabi Kazakh National University, 71 Al-Farabi av., Almaty, 050040, Kazakhstan
Bashkir State University, 32, Zaki Validi str., Ufa, 450076, Russian Federation
Sobolev Institute of Geology and Mineralogy SB RAS, 3, Academician Koptyug av., Novosibirsk, 630090, Russian Federation

Faculty of Chemistry and Chemical Technology Al-Farabi Kazakh National University
Bashkir State University
Sobolev Institute of Geology and Mineralogy SB RAS

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