Group ion-water interactions in aqueous solutions Na$_2$SO$_4$ and K$_2$SO$_4$

L. A. Morozova, S. V. Savel’ev

Kotelnikov Institute of Radioengineering and Electronics, Fryazino Branch, Russian Academy of Sciences, Fryazino, Moscow oblast, Russia

Abstract: In this work, for the first time, studies of aqueous solutions of Na$_2$SO$_4$ и K$_2$SO$_4$ were carried out based on the determination of the parameters of radiothermal radiation in the millimeter (mm) region of the spectrum. The developed method is based on the determination of the static dielectric constant of aqueous solutions – the absorption coefficient at a frequency of 61.2 GHz. Experimental data have been obtained to determine the value of the absorption coefficients of aqueous solutions of substances in a wide range of concentrations. A monotonous increase in the values of the absorption coefficients of solutions with a decrease in the concentration of base substances in the region of high dilutions was established with individual dynamics for each base substance. The changes in the dielectric constant recorded in the experiments reflect the total hydration changes in salt solutions outside the first hydration shell.

Keywords: aqueous solutions, absorption coefficient, hydration shell.

Received: 10.02.2022
Revised: 02.02.2023
Accepted: 02.02.2023

DOI: 10.21883/PJTF.2023.07.54921.19157

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