A comprehensive assessment of the edaphic conditions of technosols formed on the waste dumps of Donetsk coal mines was conducted. The main limiting factors were found to be significant variability in particle size distribution (physical clay content from 8.5 to 58.5 %) and very high heterogeneity of acid-base conditions (pH from 3.65 to 8.55). It was shown that technosols from the waste dumps of the Chumakovskaya Central Processing Plant are characterized by elevated values ​​of actual (pH < 4), exchangeable, and hydrolytic acidity, high salinity (up to 2.12 % of solid residue), low enzymatic activity, and mineral nutrient content, making their colonization by plants impossible without a preliminary technical remediation stage. The high variability of organic matter content (from 0.72 to 11.98 %) may indicate heterogeneity of composition and the presence of a large number of coal fragments. The obtained results allow for a differentiated approach to the selection of phytoremediation strategies for each of the studied sites.

Minkina T.M., Syschchykov D.V., Agurova I.V., Berezovskiy A.S., Zamulina I.V.,
Nevidomskaya D.G..