METHOD FOR DETERMINING ACTIVATION ENERGY OF DESORPTION OF SOIL EXCHANGEABLE IONS Russian patent published in 2018 - IPC G01N25/58 G01N33/24 

FIELD: physics.

SUBSTANCE: method is proposed, which consists in determining the electrical conductivity of a soil sample at different temperatures and a fixed humidity by the measured values. Calculation of the activation energy of desorption of exchangeable ions is performed by one of two equivalent methods: - by the slope angular coefficient of the approximating line of electrical conductivity dependence on the temperature constructed in the coordinates wherein the angular coefficient of the line is equal to - by the electrical conductivity of the soil sample measured at two temperature values according to the formula where E_a is activation energy of desorption of exchangeable ions J/mol; R is the universal gas constant J/(mol⋅K); T₁ and T₂ are absolute temperatures at which the measurement is carried out, K; γ₁ and γ₂ - the electrical conductivity of the soil sample at temperatures; T₁ and T₂, respectively, Sm/m; η₁ and η₂ - water viscosity at temperatures T₁ and T₂, respectively, Pa⋅s.

EFFECT: increasing the reliability of determining the activation energy of desorption of soil exchangeable ions.

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