Modeling changes in permeability characteristics of gypsified rocks accompanying brine flow

Liu, Yu; Lekhov, A. V.

doi:10.1134/s0097807813070063

Cited by 7 publications

(2 citation statements)

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“…The interaction of saline drainages with rocks was studied by reference [5] in the Verkhnekamskoe potash deposit in Russia and reference [6] in the Upper Rhine Valley in France.…”

Section: Introductionmentioning

confidence: 99%

Properties of Alluvial Soils of Taiga Forest under Anthropogenic Salinisation

Khayrulina

Bogush

Novoselova

et al. 2021

Forests

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The environmental impact of deposit development can be indirect and can cause combined geochemical processes in ecosystems. These must be taken into consideration under environmental forecasting and environmental risk assessment. Soil degradation in the Taiga Forest is considered, within the area of Verkhnekamskoye potash deposit (Russia), as an example of such environmental transformation. Here, the mechanism and characteristics of the anthropogenic salinisation of alluvial soils under potash deposit development are newly described. It was found that there is a strong anthropogenic impact of the potash industry on valley soils where the contaminated Na-Cl groundwater discharges or is close to the surface. The valley soils are characterised by high salinity, and the sum of toxic salts in soils has reached 26%. Alluvial gley humic clay chloride saline soil (Gleyic Fluvisols (Salic, Loamic, Technic)) and secondary solonchak on alluvial humic clay soil sulfate-chloride gypsum-containing surface-gleyed (Chloridic Gleyic Fluvic Solonchak (Hypersalic, Loamic, Technic)) were formed in hydromorphic conditions. Morphological, physicochemical and mineralogical analyses were carried out. Under hydromorphic conditions, Chloridic Gleyic Fluvic Solonchak (Hypersalic, Loamic) was described to show a hydrotroillite layer and reddish-yellow iron-rich precipitates on its surface. The top soil horizon has the highest content of iron minerals (up to 84.9%) and Fe-bearing plant residues (up to 20%). Additionally, the spongy and gel-like organic materials, as well as the siliceous remains of diatoms, are enriched in Ca, Fe, Cl, K, Na, S and P. The lower soil horizon consists of black gel-like phases and hydrogen sulphide settings with a high content of plant residues. The insoluble part of the samples contains up to 84% hydrogoethite. The sources of iron in soils and bottom sediments include the iron-enriched Sheshma sediments speckled rocks, slurry material, halite wastes and soil minerals of alluvial gley soils.

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“…The interaction of saline drainages with rocks was studied by reference [5] in the Verkhnekamskoe potash deposit in Russia and reference [6] in the Upper Rhine Valley in France.…”

Section: Introductionmentioning

confidence: 99%

Properties of Alluvial Soils of Taiga Forest under Anthropogenic Salinisation

Khayrulina

Bogush

Novoselova

et al. 2021

Forests

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“…Russia)(Bachurin and Baboshko 2008;Beltyukov 1996;Liu and Lekhov, 2013), the Starobinskoye Deposit (Belarus)(Kolpashnikov et al, 1979), the Alsace Deposit (France)(Lucas et al, 2010), and the oldest potash deposit in Germany (Arle and Wagner, 2013; Luo et al, 2012;Rauche et al, 2001). The migration of water-soluble salts and impurities into the environment leads to the formation of contaminated and disturbed lands(Khayrulina et al 2021).…”

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confidence: 99%

Passive Treatment of Wastewater Generated During the Enrichment of Potash Ores

Глушанкова

Рудакова

Khayrulina

et al. 2023

Preprint

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Large amount of solid and liquid waste is a serious issue associated with potash mining and processing. Potash ore enrichment generates solid halite waste, clay-salt slurry, and industrial wastewater with a high content of water-soluble salts. The «environmentally friendly» storage of such waste is a difficult technological issue. Highly mineralised water is stored on the surface and discharged into slurry storage, while some of the effluent is recycled during the production process. Over the long period of slurry storage operation at the Verknekamskoe Potash Deposit, water filtration through the dam and the slurry storage base has created a stable flow of highly mineralised water into the surface water and groundwater. The slurry storage facilities that are currently in use cannot completely fulfil the protective environmental functions. This study provides scientific rationale for the potential use of slurry reservoirs as wastewater treatment facilities. The findings show that there are fewer suspended solids in clarified water: purification efficiency is greater than 99.9%. In the clarified circulating brine, the content of mineral impurities is reduced: the content of chloride ions decreases by 46%, and the content of dry residue decreases by 45.6%. Based on the findings, the study provides recommendations for the construction and new design of a slurry storage that can be used as a treatment facility on the territory of the Verkhnekamskoe Potash Deposit in order to reduce the negative environmental impact.

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