Hygroscopic Water Content As an Indicator of Soil Dispersity: Thermodynamic Basis and Experimental Verification

Smagin, A.V.; Sadovnikova, N.B.

Авторы: Smagin A.V., Sadovnikova N.B.
Журнал: Moscow University Soil Science Bulletin
Том: 79
Номер: 2
Год издания: 2024
Издательство: Allerton Press Inc.
Местоположение издательства: United States
Первая страница: 79
Последняя страница: 90
DOI: 10.3103/S014768742470011X
Аннотация: The adsorption properties of dispersed systems are determined by their surface energy, thereforethe parameters of hygroscopy (adsorbed water content) and dispersity (specific surface area of the solidphase) of soils and sediments are in close mutual correlation. This well-known empirical fact has received anew fundamental interpretation based on the theory of disjoining water pressure according to Deryagin in theform of a thermodynamic equation that connects the specific surface area, hygroscopic water content of soil samples, and relative air humidity in the laboratory room. The theoretical equation enables us to substantiate the methodology of quantifying the hydrophilic specific surface area of soil samples based on widespread data on their hygroscopy. Comparison of the new method with the standard BET analysis of the specific surfacearea, as well as with the previously proposed physically based method for its determining by the slope of thermodynamic water retention curves, shows their statistically reliable agreement in a wide range of the estimated specific surface area from 5 to 340 m2 g–1 for soil samples of different genesis and texture.
Добавил в систему: Смагин Андрей Валентинович

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Hygroscopic Water Content As an Indicator of Soil Dispersity: Thermodynamic Basis and Experimental Verificationстатья

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