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Environmental impact assessment of acidic coal gangue leaching solution on groundwater: a coal gangue pile in Shanxi, China

Guo, Yanwen ; Li, Xiangdong ; Li, Quanzhi ; Hu, Zhenqi

Environmental geochemistry and health, 2024-04, Vol.46 (4), p.120-120 [Periódico revisado por pares]

Dordrecht: Springer Netherlands

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Título:
Environmental impact assessment of acidic coal gangue leaching solution on groundwater: a coal gangue pile in Shanxi, China
Autor: Guo, Yanwen ; Li, Xiangdong ; Li, Quanzhi ; Hu, Zhenqi
Assuntos: Aeration ; China ; Coal ; Coal - analysis ; Coal Mining ; Convection ; Dump leaching ; Earth and Environmental Science ; Environment ; Environmental Chemistry ; Environmental Health ; Environmental impact ; Environmental impact assessment ; Environmental Pollutants ; Environmental Pollution ; Finite element method ; Gangue ; Geochemistry ; Groundwater ; Groundwater pollution ; Heavy metals ; Ions ; Leaching ; Metal ions ; Metals ; Original Paper ; Pollutants ; Pollution ; Pollution dispersion ; Pollution transport ; Public Health ; Rainfall ; Resource development ; Soil ; Soil columns ; Soil Pollutants - analysis ; Soil pollution ; Soil Science & Conservation ; Soils ; Solutes ; Sulfates ; Terrestrial Pollution ; Vadose water ; Water pollution monitoring
É parte de: Environmental geochemistry and health, 2024-04, Vol.46 (4), p.120-120
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: With the continual advancement of coal resource development, the comprehensive utilization of coal gangue as a by-product encounters certain constraints. A substantial amount of untreated coal gangue is openly stored, particularly acidic gangue exposed to rainfall. The leaching effect of acidic solutions, containing heavy metal ions and other pollutants, results in environmental challenges such as local soil or groundwater pollution, presenting a significant concern in the current ecological landscape of mining areas. Investigating the migration patterns of pollutants in the soil–groundwater system and elucidating the characteristics of polluted solute migration are imperative. To understand the migration dynamics of pollutants and unveil the features of solute migration, this study focuses on a coal gangue dump in a mining area in Shanxi. Utilizing indoor leaching experiments and soil column migration experiments, a two-dimensional soil–groundwater model is established using the finite element method of COMSOL. This model quantitatively delineates the migration patterns of key pollutant components leached from coal gangue into the groundwater. The findings reveal that sulfate ions can migrate and infiltrate groundwater within a mere 7 years in the vadose zone of aeration. Moreover, the average concentration of iron ions in groundwater can reach approximately 58.3 mg/L. Convection, hydrodynamic dispersion, and adsorption emerge as the primary factors influencing pollution transport. Understanding the leaching patterns and environmental impacts of major pollutants in acidic coal gangue is crucial for predicting soil–groundwater pollution and implementing effective protective measures.
Editor: Dordrecht: Springer Netherlands
Idioma: Inglês

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Environmental impact assessment of acidic coal gangue leaching solution on groundwater: a coal gangue pile in Shanxi, China

Guo, Yanwen ; Li, Xiangdong ; Li, Quanzhi ; Hu, Zhenqi

Dordrecht: Springer Netherlands

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