Authors: S.M. Prostov, E.A. Shabanov, A.A. Bushuev

Title of the article: Modeling of physical processes in electrical treatment of soils contaminated with electrically contrasting toxicants

Year: 2025, Issue: 6, Pages: 65-74

Branch of knowledge: 2.8.3 Mining and oil and gas geology, geophysics, mine surveying and subsurface geometry

Index UDK: 504.064:550.837.3:550.84.02

DOI: 10.26730/1999-4125-2025-6-65-74

Abstract: Soil contamination with ecotoxicants (organic, inorganic, bioorganic, radioactive) is a very serious environmental problem. The objective of the work is to establish patterns of spatiotemporal changes in the physical properties of sandy-clayey soils contaminated with high-resistance (oil products) or low-resistance (solutions of inorganic substances) ecotoxicants, and the relationships between them during electrical treatment. Using a laboratory model of a two-electrode installation with real physical and technological parameters, it was established that three characteristic zones of approximately equal width are formed during treatment with high-density currents: an anode zone, from which, under the action of an electric field, a progressive electroosmotic movement (outflow) of the natural liquid and the organic toxicant particles captured by it towards the cathode occurs; a cathode zone, in which the displaced liquids with properties changed during the movement accumulate; and a central (transitional) zone, in which a gradual change in the properties of the liquids occurs. When treating soils contaminated with oil products, the most significant for decontamination are: electroosmotic movement of the fluid «natural liquid-toxicant» from the anode to the cathode with the possibility of subsequent mechanical removal; transition due to the thermal effect of the oil product from a liquid state to a solid, less environmentally hazardous state. The intensity of both processes is interconnected with the boundaries and amplitude of positive anomalies of the specific electrical resistance (SER), which allows for continuous geophysical monitoring of the processes. Control of the processes of decontamination of soils contaminated with inorganic acids (alkalis), including electrolysis, moisture evaporation and electroosmotic movement of the toxicant, is ensured by changes in SER in the near-electrode and central zones.

Key words: Oil product inorganic pollutant specific electrical resistance humidity density particle size distribution

Receiving date: 01.04.2025

Approval date: 15.11.2025

Publication date: 22.12.2025

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