Soil-Ecological Assessment of Recultivation at the Spoils of Coal Deposits
V. A. ANDROKHANOV1, A. E. BOGUSLAVSKY2, D. A. SOKOLOV1, YU. O. FILONOVA2,3, A. A. UZHOGOVA2,3
1Institute of Soil Science and Agrochemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
2Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
3Novosibirsk State Technical University, Novosibirsk, Russia
Keywords: coal spoil recultivation, heavy metals, occurrence forms, accumulation ratio of elements in plants, vegetation cover, hydrothermal conditions
Pages: 1-12
Abstract
The article reports the geochemical characterization of soils, vegetation, and groundwater of the recultivated spoils of three coal deposits. Recultivation was carried out 30-40 years ago, and then the spoils were left for self-overgrowth without any additional measures. A common pattern for all sites is the presence of carbonaceous particles, their oxidation leads to an increase in temperature in the spoil rocks. The sum of biologically active temperatures exceeds the values for natural soils of undisturbed areas. Technogenic landscapes are characterized by a smaller share of moisture-loving forest and pratal species, compared to the reference areas. Hydrogeochemical anomalies practically do not go beyond the flooded borrow excavations of spoils. Reclamation by applying a fertile soil layer provides minimization of the negative effects associated with an increase in the temperature of spoil soils and accelerates the remediation of regional plant communities.
DOI: 10.15372/CSD2023433
EDN: AESHPZ
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