TY - JOUR

T1 - Sorption of Methylene Blue by Polysorb MP from 40 and 95% Aqueous Solutions of Alcohol

AU - Podlipskaya, T. Yu

AU - Barakina, M. K.

AU - Demidova, M. G.

AU - Shaparenko, N. O.

AU - Tatarchuk, V. V.

AU - Plusnin, P. E.

AU - Maksimovskii, E. A.

AU - Gusel’nikova, T. Ya

AU - Polyakova, E. V.

AU - Bulavchenko, A. I.

N1 - This work was supported by the RF Ministry of Science and Higher Education, project no. 125021302133-1. Sorption of Methylene Blue by Polysorb MP from 40 and 95% Aqueous Solutions of Alcohol / T. Yu. Podlipskaya, M. K. Barakina, M. G. Demidova [et al.] // Russian Journal of Physical Chemistry A. – 2025. – Vol. 99, No. 9. – P. 2193-2206. – DOI 10.1134/S0036024425701420

PY - 2025/9/16

Y1 - 2025/9/16

N2 - Abstract: AES ICP, CHNS, TGA, and capillary electrophoresis are used to determine the chemical composition of medical enterosorbent Polysorb MP (colloidal particles of silicon dioxide) and the dispersion medium in contact with it. Polysorb dispersions in water, 40 and 95% water–ethanol solutions are obtained and characterized via photon-correlation spectroscopy (PCS) and the phase analysis of scattered light (PALS). The average hydrodynamic diameter of fractal-like aggregates of primary particles is 105–135 nm, and the electrokinetic potential varies from −28 to −22 mV. The charge of one aggregate falls as the content of alcohol rises in the order −89, −54, and −29 e. The maximum sorption of methylene blue falls sharply, from 10 to 0.7 mg/g. It is shown that the values of limit sorption considerably higher than the number of negative surface centers calculated according to PALS in the spherical aggregate model, but are less than the number of silanol groups found by TGA. A hypothesis is made about the mechanism of cation exchange during Polysorb MP’s sorption of cationic dyes.

AB - Abstract: AES ICP, CHNS, TGA, and capillary electrophoresis are used to determine the chemical composition of medical enterosorbent Polysorb MP (colloidal particles of silicon dioxide) and the dispersion medium in contact with it. Polysorb dispersions in water, 40 and 95% water–ethanol solutions are obtained and characterized via photon-correlation spectroscopy (PCS) and the phase analysis of scattered light (PALS). The average hydrodynamic diameter of fractal-like aggregates of primary particles is 105–135 nm, and the electrokinetic potential varies from −28 to −22 mV. The charge of one aggregate falls as the content of alcohol rises in the order −89, −54, and −29 e. The maximum sorption of methylene blue falls sharply, from 10 to 0.7 mg/g. It is shown that the values of limit sorption considerably higher than the number of negative surface centers calculated according to PALS in the spherical aggregate model, but are less than the number of silanol groups found by TGA. A hypothesis is made about the mechanism of cation exchange during Polysorb MP’s sorption of cationic dyes.

KW - SiO2 nanoparticles

KW - adsorption

KW - methylene blue

KW - microemulsions

KW - sodium bis(2-ethylhexyl)sulfosuccinate

UR - https://www.mendeley.com/catalogue/dbcea6e8-ff21-3f9e-a4dd-8f627ca6d14f/

UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105016630393&origin=inward

UR - https://elibrary.ru/item.asp?id=82875974

U2 - 10.1134/S0036024425701420

DO - 10.1134/S0036024425701420

M3 - Article

VL - 99

SP - 2193

EP - 2206

JO - Russian Journal of Physical Chemistry A

JF - Russian Journal of Physical Chemistry A

SN - 0036-0244

IS - 9

ER -