4 (32) 9. MULTIFUNCTIONAL NANOCOMPOSITES AS HIGHLY EFFICIENT SORBENTS FOR PURIFICATION OF TECHNOGENICALLY POLLUTED WATERS

УДК 70.25.09 : 621.039.75 • Issue 4 (32) / 2020 • 77-85 pages

 

Zabulonov Y., Kadoshnikov V., Melnychenko T., Zadvernyuk H., Kuzenko S., Puhach O.

Zabulonov Y.L., Corresponding Member of the National Academy of Sciences of Ukraine, D. Sc. (Tech.), Professor, Director, State Institution “The Institute of Environmental Geochemistry of National Academy of Sciences of Ukraine”, Zabulonov@igns.gov.ua, ORCID: 0000-0001-8239-8654

Kadoshnikov V.M., Research Scientist State Institution “The Institute of Environmental Geochemistry of National Academy of Sciences of Ukraine”, IGNS_Kadoshnikov@igns.gov.ua ORCID: 0000-0001-8707-873X

Melnychenko T.I., Ph.D. in Biology, Senior Research Scientist, State Institution “The Institute of Environmental Geochemistry of National Academy of Sciences of Ukraine”, tim–@ukr.net, ORCID: 0000-0003-2349-5395

Zadvernyuk H.P., Ph.D. in Geology, Senior Research Scientist, State Institution “The Institute of Environmental Geochemistry of National Academy of Sciences of Ukraine”, IGNS_Zadverniuk@igns.gov.ua, ORCID: 0000-0001-6425-9845

Kuzenko S.V., Research Scientist, State Institution “The Institute of Environmental Geochemistry of National Academy of Sciences of Ukraine”, IGNS_Kuzenko@nas.gov.ua, ORCID: 0000-0003-2641-6699

Puhach O.V., Junior Research Scientist, State Institution “The Institute of Environmental Geochemistry of National Academy of Sciences of Ukraine”, IGNS_Puhach@nas.gov.ua, ORCID: 0000-0002-1378-3820

Abstract

The article is devoted to the development of nanosized sorbents for the removal of cesium and strontium, as well as heavy metal ions simultaneously present in a multicomponent two-phase solution containing complexing agents and surfactants. Magnetically sensitive nanosorbents are currently considered promising since the influence of external fields can improve the performance of the developed sorbents. To create magnetically sensitive nanoparticles and composites based on them, we used carbon-coated nanoparticles of metals in a composition with montmorillonite. The scanning electron microscopy revealed that the use of electric hydraulic discharge to increase the efficiency of sorbents had not led to a positive result because the high voltage electric pulse passage through the aqueous dispersion causes the carbon shell disintegration, while the metal nanoparticles form aggregates as a result of the partial melting. The use of the pulsed magnetic field in the synthesis of a nanosized composite based on montmorillonite and magnetite is explained by the influence of the magnetic field on the particle size. It has been ascertained that the size of the nanoparticles changes depending on the duration of the magnetic field interaction with the aqueous dispersion. At the beginning the particle size slightly decreases, and then it increases. The obtained nanosized composite allows to remove cesium – 80%, strontium – 90%, iron – 99%, cobalt – 97%, and manganese – 98% from a multicomponent two-phase solution containing simultaneously cesium, strontium, cobalt, manganese, iron and organic substances, including surfactants and complexing agents. The results of the research allow us to recommend using nanosized magnetically sensitive composite based on magnetite and montmorillonite for the purification of multicomponent technogenically polluted waters.

Key words: nanocomposite, magnetically sensitive sorbent, sorption, montmorillonite, technogenically polluted waters, radionuclides, heavy metals.

 

Article

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