https://sci.ldubgd.edu.ua/jspui/handle/123456789/7117 2026-11-15T04:34:36Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/19553 Title: Моделювання атмосферно зумовленого вилуговування заліза з породного відвалу ЦЗФ «Червоноградська». Authors: Кочмар, І.М.; Карабин, В.В. 2026-10-01T00:00:00Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/19544 Title: Integrated Mathematical and Physical Modelling of Salt Ions Leaching from Coal-Mining Waste: Implications for Ecological Safety and Civil Protection Authors: Karabyn, V.; Kochmar, I.; Karabyn, O.; Sutherland, C.; Loboichenko, V.; Khorolskyi, A. Abstract: Coal-mining waste heaps represent a significant source of dissolved salts that can be mobilized by precipitation, posing risks to ecological safety and civil protection. This study focuses on the Chervonohrad Central Concentration Plant spoil heap in western Ukraine, where both thermally altered and unaltered argillite were tested. Laboratory column experiments were performed on 100 g samples flushed with deionised water to simulate leaching under controlled conditions. The cumulative leachate volumes reached approximately 432 L, allowing quantification of total dissolved solids and ionspecific contributions. We flushed 100 g columns for 24 h at 300 mL·min⁻¹ (8.5 L recirculated; ≈ 432 L passed), which yielded final filtrate total dissolved solids of 462 vs. 185 mg·L⁻¹ for burnt and unburnt argillite and cumulative leached masses of 3.93 vs. 1.57 g (≈ 2.5× higher for burnt). Early-time contrast was also strong: after 2 h (≈ 0.7 L), burnt reached 183 mg·L⁻¹ vs. 50 mg·L⁻¹ (≈3.7×). Physical observations were combined with a mathematical modelling approach to establish a precipitation-response relationship linking annual rainfall to total dissolved solids release. The results indicate a strong linear increase of annual salt release with precipitation, with burnt materials exhibiting markedly higher fluxes. This integrated framework demonstrates how laboratory data and simple models can be applied to anticipate pollutant releases, supporting ecological safety and informing civil protection measures in coal-mining regions prone to hydrological extremes. 2026-01-01T00:00:00Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/19540 Title: Predictive modelling of iron leaching from mining waste: Civil protection and environmental safety implications. Authors: Karabyn, V.; Kochmar, I.; Karabyn, O.; Linchevskyi, Y.; Loik, V.; Babadzhanova, O.; Lazaruk, Y.; Rogulia, A.; Smotr, O.; Synelnikov, O. Abstract: Coal waste piles pose significant risks to water quality, ecosystem health, and community well-being. In Ukraine’s Lviv–Volyn coal basin, the Chervonohrad concentrating plant’s waste pile exemplifies these challenges: unchecked physical processes can mobilise iron, contaminating groundwater and surface waters. No prior study has systematically linked precipitation to iron leaching in this context. This research creates and tests a predictive model relating precipitation to annual iron leaching from coal-mining waste. Laboratory column experiments on argillite flushed with deionised water under controlled flow generated empirical data for calibration. Using similarity theory (π-theorem) and regression analysis, we derived a simple linear relation for a unit spoil volume (1 Mm³): each additional millimetre of year precipitation mobilises 0.01 kg Fe∙Mm⁻³∙y⁻¹. Under the mean annual precipitation of 607.9 mm, the model indicates 24.8 kg Fe∙Mm⁻³∙y⁻¹; scaled to the Chervonohrad waste volume (48.89 Mm³), this equates to 1212 kg∙y⁻¹. Environmental and civil safety specialists and regulators, based on local precipitation data and the model we developed, can calculate seasonal or annual iron loading without large-scale field sampling. Civil protection agencies can likewise use these predictions for early warning and readiness during wet years. The approach developed by the authors is accurate, easy to apply, and can be used in other mining regions with similar climatic and geological conditions. It provides a compact rule-of-thumb for monitoring design, optimisation of containment and treatment, and policy-relevant thresholds to protect aquatic resources-bridging laboratory science and on-the-ground decision-making under changing precipitation patterns. 2026-01-01T00:00:00Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/18858 Title: Інженерні рішення пасивного захисту об’єктів від безпілотних літальних апаратів Authors: Лоїк, Василь Богданович; Синельніков, Олександр Дмитрович; Бабаджанова, Ольга Федорівна 2025-01-01T00:00:00Z