Sulfide oxidation during the simulated weathering of pyrrhotite-rich tailings: Impacts of freeze-thaw cycles and chloride salinity

Schudel, Gary; Plante, Benoît; Bussière, Bruno; Boulanger-Martel, Vincent; McBeth, Joyce

doi:10.1016/j.coldregions.2023.103802

Cited by 2 publications

(1 citation statement)

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“…These constitute a potential source of pollution generated by the storage of waste from mineral extraction and chemicals used in industrial processing (Ahmedat et al, 2018). Tailings stored on site are exposed to ongoing weathering (Schudel et al, 2023, Khalidy et al, 2021. The release of metals comes from dissolution of mineral species in disequilibrium with the conditions of the environment containing them.…”

Section: Introductionmentioning

confidence: 99%

Groundwater Quality in the Vicinity of an Abandoned Mining Site – The M'fis Mine, Southeast of Morocco

Abdellaoui¹,

Abdaoui²,

Boukhoubza³

et al. 2023

Ecol. Eng. Environ. Technol.

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The diagnosis of the current state of the environment (groundwater quality and tailings composition) was carried out in the vicinity of the M'fis mine (Southeast of Morocco) in order to evaluate the impact of mine tailings on groundwater. Water samples from the well in the center of the mine site and from other nearby wells were collected and analyzed. In addition, the characterization of the tailings shows the presence of sulfides and other chemical elements, constituting the main source of pollution. In turn, the results of geochemical analyses show that groundwater is characterized by low levels of metals, despite the presence of these pollutants in the tailings and in the waste rock piles. The concentrations of metallic trace elements in well groundwater, slightly exceeding the standards of potability (the WHO standard), remain acceptable for irrigation and for livestock. These results can be explained by the carbonate geological formation, constituting the transfer medium of the pollutants towards the aquifer and also by the weak circulation of the metal ions under the desert climate which prevent dissolution and infiltration.

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Section: Introductionmentioning

confidence: 99%

Groundwater Quality in the Vicinity of an Abandoned Mining Site – The M'fis Mine, Southeast of Morocco

Abdellaoui¹,

Abdaoui²,

Boukhoubza³

et al. 2023

Ecol. Eng. Environ. Technol.

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Hydrochemical Anomalies in the Vicinity of the Abandoned Molybdenum Ores Processing Tailings in a Permafrost Region (Shahtama, Transbaikal Region)

Yurkevich

Оленченко

Kartoziia

et al. 2023

Water

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The mobility of chemical elements during the transition from molybdenum ore processing waste to aqueous solutions and the hydrochemical anomalies of a number of elements in surface and underground waters in the vicinity of an abandoned tailings dump were investigated. It is shown that alkaline and alkaline earth metals have high mobility—the main rock-forming components (sodium, lithium, magnesium, strontium), which are released into solution due to leaching from the minerals of the host rocks, as well as metals with zinc, cadmium, manganese, and nickel, which are released into solution due to the dissolution of ore sulfides. Elements with high mobility include Sb, Co, Cu, Be, Se, and Tl. Medium mobility has As, an element of the first hazard class, as well as Mo, Fe, and Pb. Hydrochemical anomalies of cadmium, arsenic, molybdenum, and lead have been determined. The nature of the arsenic and molybdenum anomalies is most likely related to the regional background, while the source of cadmium and lead is most likely the waste studied. The main chemical forms of the presence of elements in the solution of ponds on the surface of tailings ponds are free-ion and sulfate complexes. For example, in the samples of the Shakhtama River and groundwater, we found carbonate, bicarbonate, and hydroxide complexes. The information obtained should be taken into account when planning measures for the purification of surface and groundwater from metals. Additional studies should consider using groundwater in the vicinity of the tailings for drinking water supply.

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Sulfide oxidation during the simulated weathering of pyrrhotite-rich tailings: Impacts of freeze-thaw cycles and chloride salinity

Cited by 2 publications

References 53 publications

Groundwater Quality in the Vicinity of an Abandoned Mining Site – The M'fis Mine, Southeast of Morocco

Groundwater Quality in the Vicinity of an Abandoned Mining Site – The M'fis Mine, Southeast of Morocco

Hydrochemical Anomalies in the Vicinity of the Abandoned Molybdenum Ores Processing Tailings in a Permafrost Region (Shahtama, Transbaikal Region)

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