Earth’s Cryosphere, 2018, Vol. XXII, No. 1, p. 25-28
THE INFLUENCE OF ACCOMPANYING COMPONENTS ON THE SORPTION OF MOLYBDATE ANIONS FROM AQUEOUS SOLUTIONS ON DISPERSED ICE SURFACE
V.I. Fedoseeva1,2, N.F. Fedoseev1, M.P. Burnasheva1
1 Melnikov Permafrost Institute, SB RAS, 36, Merzlotnaya str., Yakutsk, 677010, Russia; vifgoreva@gmail.com
2 Ammosov North-Eastern Federal University, 58, Belinsky str., 677000, Yakutsk, Russia
The ice surface in the natural environments of the Earth may influence natural processes due to activity of the quasi-liquid film that is formed on the surface of ice crystals. Sorption of molybdate anions (4•10–5 mol/L) from water solutions by the surface of dispersed ice particles is investigated. Supporting electrolyte is KCl (11.75 g/100 g of water) with addition of magnesium chloride with concentration not greater than 10–2 mol/L or ethanol with concentration not greater than 10–1 mol/L. The temperature is –5.1 °C. It has been demonstrated that increase of the content of magnesium chloride promotes sorption of molybdate anions. In contrast, increase of the content of alcohol lowers it. Different effects of added substances may be due to the different degrees of the influence of magnesium chloride ions and undissociated organic substance of the water structure in the quasi-liquid film on the nature of dissolution of the other substances in it. The polar ethanol molecules can interact also with the surface of dispersed particles of ice.
Ice, quasi-liquid film, sorption, molybdate anion, magnesium ion, ethanol