Izvestiya of Saratov University.

Chemistry. Biology. Ecology

ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)

For citation:

Loseva A. S., Komov D. N., Lamikhova A. P., Kazarinov I. А. The study of the physic-chemical properties of bentonite-based composite sorbents modified with carbon under the conditions of catalytic carbonization. Izvestiya of Saratov University. Chemistry. Biology. Ecology, 2022, vol. 22, iss. 1, pp. 9-15. DOI: 10.18500/1816-9775-2022-22-1-9-15

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Full text:
(downloads: 152)
Article type: 

The study of the physic-chemical properties of bentonite-based composite sorbents modified with carbon under the conditions of catalytic carbonization

Loseva Anna S., Saratov State University
Komov D. N., Saratov State University
Lamikhova Anna P., Saratov State University
Kazarinov Ivan А., Saratov State University

The structural and sorption properties of composite sorbents based on natural bentonite modified with carbon compounds have been investigated. Modification of the initial bentonite by low-temperature (650°C) pyrolysis of sucrose in the presence of metal salts of the iron subgroup leads to a significant increase in the specific surface area of composite sorbents (up to 275 m2/g), this is due to low-temperature catalytic graphitization of the carbon fraction formed during pyrolysis. The sorption capacity of the investigated nanostructured composite sorbents with respect to nickel (II) and lead (II) ions has been studied. The highest values of the limiting adsorption of nickel (II) and lead (II) ions in neutral solutions (30–86 mg/g) were obtained on composite sorbents in which the introduced carbon underwent a stage of low-temperature catalytic graphitization. The pyrolytic method of introducing carbon with its simultaneous catalytic graphitization into composite sorbents based on bentonite is promising for the further improvement of sorbents based on natural aluminosilicates.

  1. Kovzun I. G. Interphase interactions in the formation of alkaline silicate and carbon-silicate systems. Diss. Dr. Sci. (Chem.). Мoscow, 1992. 346 p. (in Russian).
  2. Doroshenko V. E., Tarasevich Yu. I., Kozub G. A. Sorption of phenol by semi-synthetic and natural sorbents. Chimiya i technologiya vody, 1995, vol. 17, no. 3, pp. 248–251 (in Russian).
  3. Goncharuk V. V., Soboleva N. N., Nosonovich A. N. Physicochemical aspects of the problem of soil and hydrosphere pollution with heavy metals. Chemistry for Sustainable Development, 2003, no. 11, pp. 795–809 (in Russian).
  4. Saranchuk V. I., Il’yashev M. A., Oshovsrij V. V., Saranchuk E. V. Uglerod: neizvestnoe ob izvestnom [Carbon: The unknown about the known]. Donetzk, UK Zentr Publ., 2006. 400 p. (in Russian).
  5. Strelko V. V., Stavitskaya S. S., Zazhigalov V. A. Selektivnaya sorbtziya i kataliz na aktivnykh uglyakh i neorganicheskikh ionotakh [Selective sorption and catalysis on activated carbons and inorganic ion exchangers]. Kiev, Naukova Dumka Publ., 2008. 304 p. (in Russian).
  6. Pan’ko A. V., Kovzun I. G., Ul’berg Z. R. The use of nanoporous clays as sorbents for the removal of phthalates from aqueous media. Nanoporous Materials, 2009, no. 2, pp. 93–120 (in Russian).
  7. Hanhasaeva S. C., Badmaeva S. V., Dashimanzhilova E. C. The effect of modifi cation on the structural, acidic and catalytic properties of natural layered aluminosilicate. Kinetics and Catalysis, 2004, vol. 5, no. 5, pp. 748–753 (in Russian).