Production of Aqueous Colloidal Se Solution by Mechanical Dispersion

Abstract

Owing to its antioxidant properties, selenium is an essential trace element for human life which enters the body mainly from foods of plant origin. To obtain selenium nanoparticles for the preparation of functional foods enriched in selenium, in this work, the method of mechanical dispersion was used. Colloidal solutions of selenium nanoparticles ranging in size from 20 to 100 nm were obtained by mechanical dispersion of selenium granules in distilled water using a vibrating machine of the Metapolan-2 type at a frequency of 100 Hz. The Se concentration in the solution was measured by means of atomic emission spectroscopy and reached from 2 to 10 mg/L. It has been established that the properties of colloidal selenium solutions prepared by mechanical dispersion largely depend on the material of the weighing bottle in which they are obtained. Selenium colloidal solutions obtained in plastic bottles have acidic properties, while solutions obtained in glass bottles are alkaline. Using the method of electron microscopy, it is shown that the evaporation of colloidal solutions leads to the formation of fractal structures.

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ACKNOWLEDGMENTS

We are grateful for the assistance in the work and discussion of the research results to the staff of the Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences: Prof. L.V. Kovalenko and senior researchers V.A. Volchenkova and S.A. Maslyaev.

The studies were partially carried out using the equipment of the Common Use Center of Physical Research Center of the Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences.

Funding

The work was carried out according to state assignment no. 075-00746-19-00.

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Correspondence to V. N. Kolokoltsev.

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Translated by M. Drozdova

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Kolokoltsev, V.N., Folmanis, G.E. & Fedotov, M.A. Production of Aqueous Colloidal Se Solution by Mechanical Dispersion. Inorg. Mater. Appl. Res. 11, 699–704 (2020). https://doi.org/10.1134/S2075113320030223

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Keywords:

  • microelement
  • selenium
  • dispersion
  • colloidal solutions
  • vessel material
  • concentration
  • evaporation
  • dendrite structures