MODIFICATION OF MAGNETITE NANOPARTICLES BY NATURAL POLYSACCHARIDES

V E Proskurina; S. S. Tuganov; D. O. Sagdeev; A P Rahmatullina; Yu G Galyametdinov

doi:10.55421/3034-4689_2026_29_10_10

MODIFICATION OF MAGNETITE NANOPARTICLES BY NATURAL POLYSACCHARIDES

Published in Herald of Technological University · Volume 29, Issue 10, 2026 · Pages 10–15 · Rubric: 1. Chemistry

DOI: https://doi.org/10.55421/3034-4689_2026_29_10_10 · EDN: RGAZRU

Received: 04.06.2026 Accepted: 04.10.2026 Published: 30.10.2026

Authors

V E Proskurina

S. S. Tuganov

D. O. Sagdeev

A P Rahmatullina

et al.

Yu G Galyametdinov

V E Proskurina

KNITU; KNITU

S. S. Tuganov

Kazan National Research Technological University Kazan

D. O. Sagdeev

Kazan National Research Technological University Kazan

A P Rahmatullina

KNITU

Yu G Galyametdinov

KNITU

ABSTRACT

Magnetite (Fe₃O₄) particles were synthesized via the co-precipitation method from salts of divalent and trivalent iron in the presence of ammonia hydrate, with a molar ratio of Fe³⁺/Fe²⁺ = 2:1, using sodium citrate as a stabilizer. As a result of chemisorption, citrate anions become firmly attached to the surface of the magnetite particles, generating a strong negative charge. The size of the synthesized magnetite nanoparticles was determined by dynamic light scattering to be d = 75.9 nm, with a ζ-potential of -45.4 mV. Chemical modification was performed using the reactive hydroxyl groups of citrus pectin. Functionalization of magnetite was carried out at an optimal biopolymer-to-magnetite ratio of 5:1 in the mixture. The formation of magnetic nanocomposites was confirmed by Fourier-transform infrared spectroscopy. By varying the concentration of magnetic flocculants based on magnetite and natural polymers, as well as the pH of the medium, their influence on the flocculation parameters of the system was examined. It was observed that the differences in the flocculation effect with varying pH are due not only to changes in the structure of the electrical double layer around the blue clay particles but also to changes in the adsorption behavior of the magnetic flocculant macromolecules on the dispersed phase particles-macromolecules adsorb either onto a single dispersed-phase particle or onto already formed flocs. It was established that the flocculation mechanism is determined by the charge magnitude of the blue clay suspension particles and the charged macromolecules of the magnetic flocculant. The identified patterns and effects of the flocculation process under free (unhindered) sedimentation conditions appear promising for the directed regulation and control of suspension stability involving magnetic nanocomposites.

KEYWORDS

MAGNETIC NANOPARTICLES, PECTIN, FLOCCULATION, BLUE CLAY

Funding

Issledovanie vypolneno v ramkah Gosudarstvennogo zadaniya № 075-00021-26-00 ot 12.01.2026 (FZSG2026-0003).

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GOST

, Tuganov S. S., Sagdeev D. O., , MODIFICATION OF MAGNETITE NANOPARTICLES BY NATURAL POLYSACCHARIDES // Herald of Technological University. 2026. no. 10. pp. 10-15. DOI: https://doi.org/10.55421/3034-4689_2026_29_10_10. EDN: RGAZRU. (Date of access 15.11.2026).

MLA

V E Proskurina, Tuganov S. S., Sagdeev D. O., , . "MODIFICATION OF MAGNETITE NANOPARTICLES BY NATURAL POLYSACCHARIDES." Herald of Technological University 29.10 (2026): 10-15. DOI: https://doi.org/10.55421/3034-4689_2026_29_10_10. EDN: RGAZRU.

APA

, Tuganov S. S., Sagdeev D. O., , (2026). MODIFICATION OF MAGNETITE NANOPARTICLES BY NATURAL POLYSACCHARIDES. Herald of Technological University, 29(10), 10-15. https://doi.org/10.55421/3034-4689_2026_29_10_10 EDN: RGAZRU.

Chicago

V E Proskurina, Tuganov S. S., Sagdeev D. O., , . "MODIFICATION OF MAGNETITE NANOPARTICLES BY NATURAL POLYSACCHARIDES." Herald of Technological University 29, no. 10 (2026): 10-15. https://doi.org/10.55421/3034-4689_2026_29_10_10. EDN: RGAZRU.

WIKI

{{cite journal | author = , Tuganov S. S., Sagdeev D. O., , | title = MODIFICATION OF MAGNETITE NANOPARTICLES BY NATURAL POLYSACCHARIDES | journal = Herald of Technological University | year = 2026 | volume = 29 | issue = 10 | pages = 10-15 | doi = 10.55421/3034-4689_2026_29_10_10 }} EDN: RGAZRU

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