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Assessment of the Effectiveness of Open-Cast Sand Mine Reclamation

Żukowska Grażyna, Myszura-Dymek Magdalena, Durczyńska Zofia

Advances in Science and Technology. Research Journal

2024

Vol. 18, no. 8

281--290

The aim of the study was to assess the effect of sewage sludge (industrial and municipal) as components of composites with anthropogenic soil, used to create the top (0-25 cm) cover layer of open-cast sand mine reclamation on the content of organic carbon and plant nutrients (total N and available forms of P, K and Mg). In the excavation after sand mining, a reclamation technology was used, including filling the excavation with waste and producing Technosol using technical methods. The assessment of the effects of open-cast sand mine reclamation with waste showed that the reclamation cover made of waste meeting the ecological safety criteria was a good substrate for the emerging technogenic soil. The composite created from anthropogenic soil with the addition of sewage sludge (10:1) was characterized by a higher content of organic carbon, total nitrogen and available forms of P, K and Mg compared to anthropogenic soil fertilized with NPK fertilizers and manure. Monitoring of the surface layer properties (0-20 cm), carried out two years after introducing vegetation to the reclaimed area, showed that the assessed technology of reclamation of the excavation after sand mining using waste is a good way to solve the problem of dry areas devastated by open-cast mining of mineral deposits. Moreover, such waste management is in line with the strategy of the Closed Circulation Economy.