The calculation of desalination of mineralized porous ice at thawing

• Published in: Ice and Snow
• Main Authors: A. Sosnovsky V., I. Kontorovich I., А. Сосновский В., И. Конторович И.
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: IGRAS 2016
• Subjects: desalination; diffusion coefficient; mineralized water; porous ice; коэффициент диффузии;минерализованная вода;опреснение;пористый лёд; Annals of Glaciology
• Online Access: https://ice-snow.igras.ru/jour/article/view/342; https://doi.org/10.15356/2076-6734-2016-4-545-554

The results obtained in this work demonstrate that dynamics of desalination of porous ice depends on a mobility of ions of salts, and the mobility is determined by the diffusion coefficient. The ice was made by freezing of mineralized water of different chemical composition. Model calculations of average mineralization of the porous ice at its thawing were made, and the ion concentrations of different salts were defined. Values of the diffusion coefficients of the salt ions in the film of brine ice pellets were obtained by means of comparison of results of measurements and calculations of dynamics of content of the salt ions in a porous ice at its thawing. The diffusion coefficient of ions Na+, Cl−, SO4 2− is by order of magnitude larger than that of Ca2+ and by two orders of magnitudethan HCO3 −. This results in that the content of ions Na+, Cl−, SO42− decreases in porous ice at its thawing 3 times faster than the content of the ions Ca2+. Basing on analysis of chemical composition of drainage water in some regions in Russia a possibility to desalinate the porous ice formed during the winter sprinkling is demonstrated. Рассмотрена динамика опреснения пористого льда, намороженного из минерализованной воды разного химического состава. Выполнены модельные расчёты минерализации пористого льда при таянии и концентрации в нём ионов различных солей. Путём сравнения измеренной динамики содержания ионов солей в пористом льду при таянии и расчётов определены коэффициенты диффузии ионов солей в плёнке «рассола» ледяных гранул. На основе анализа химического состава дренажных вод в некоторых районах России показана возможность применения опреснения пористого льда, образованного при зимнем дождевании.