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Showing 1 to 20 of 28 for “"Mine water"”.
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Crop response to irrigation with acidic and neutralized, saline mine water
… mining activities and concurrent abandonment of mines in many South African mining areas has left the state with the responsibility of caring for and rehabilitating ownerless mines, which are prone to flooding and discharge acid mine drainage (AMD) to surrounding environments. In the …
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Abrasion-corrosion and stress corrosion resistance of a 9Cr-2Ni-0.7Mo steel in simulated mine water
… underground environment in South African gold mines. The results indicate that the alloy performs favourably in abrasive-corrosive applications, outperforming several other higher chromium containing steels which have been designed for the purpose. The alloy is also highly resistant to sec at …
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An investigation towards passive treatment solutions for the oxidation of sulphide and subsequent removal of sulphur from acid mine water
Mine wastewaters are presently generated at working and abandoned mining operations, both within South Africa and internationally. Currently, active treatment systems are being utilised to treat the voluminous quantities of acid rock drainage that are being generated within South Africa, largely as …
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The chemical response of deep, leached and weathered soils of the Mpumalanga Highveld, South Africa, to irrigation with saline mine water
… between 14 and 30 million litres of waste water per day. Much of the water is saline (TDS> 2500 mg/I) and has high concentrations of dissolved SO₄²⁻, Ca²⁺ and Mg²⁺. Crop irrigation has been proposed as a useful way to dispose of saline mine water and enhance agricultural productivity in …
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The influence of water composition on the pitting behaviour of newly developed corrosion resistant steels
… of the working stapes in South African gold mines has required the introduction of a fundamentally new technology, hydro-power, in which machines are powered hydraulically using mine water fed from above ground. Mine water is aggressive and has a variable acidity and pH, and contains high …
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Environmental impact of mine drainage and its treatment on aquatic communities
… analysis of eight Welsh streams impacted by mine drainage is used to discern the effects of water and sediment related variables and elucidate the most important variables in the impact of mine pollution on freshwater macroinvertebrate communities. The implications of this are to be …
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Eco-Integrated Production and Formulation of Arthrospira platensis Dietary Supplements
… in vertical tubular photobioreactors utilizing mine water supplemented with Zarrouk medium, achieving biomass yields and pigment concentrations comparable to conventional systems while significantly reducing dependence on freshwater resources. Notably, cultivation in mine water resulted in a …
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Lithostratigraphic and Geochemical Characterisation of the Waterberg Coalfield: Implications to Acid Mine Drainage, Limpopo Province, South Africa
The study conducted at Sekoko coal mine in the Waterberg coalfield of South Africa aimed to establish the quality of coal and its host rocks, as well as the potential for acid mine water generation. A total of 18 samples were collected from a box-cut and analysed using various methods such as, …
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Honeycomb fiber-reinforced polymer sandwich composites for development of aquaculture raceway systems
It is argued that the utilization of impaired mine waters abundant in WV and other mid-Appalachian states for fish culture can substantially increase aquaculture economic development. The primary limitation to the effective utilization of discharged waters is the lack of suitable fish culture tanks …
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The slurry erosive-corrosive wear of a selection of aliminium alloys, particulate reinforced aluminium metal matrix composites and a selection of steels
… of silica sand suspended in either distilled water or synthetic mine water. Several steels were also tested in order to clarify certain concepts relating to the synergistic effects of erosion and corrosion. In general both the heat-treatable and non heat-treatable aluminium alloys exhibit …
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IWRM-tested national law and policies: towards catchment-based management of water resources during the life cycle of large-scale mining sites
Negative impacts of large-scale metal/mineral mining (LSM) on the quantity and quality of surface and ground water resources within the catchment are systematic occurrences during both mining and post-mining phases. The lack of adequate engagement by mining companies with interested and affected …
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RESPONSES OF RECENT BENTHIC FORAMINIFERA TO METAL POLLUTION IN SOUTH WEST ENGLAND ESTUARIES: A STUDY OF IMPACT AND CHANGE
… Cornwall in January 1992 of metalled acidic mine water drainage from the recently closed Wheal Jane tin mine. Shortly after this discharge a post-impact study using the responses of Recent benthic foraminifera as indicators of metal pollution was carried out on this Creek which had not been …
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Evaluation of potential acid mine drainage: A case study of the Albert Silver Mine, Mpumalanga Province, South Africa
Generally, mining produces mine wastes that contain sulfide minerals that have potential to produce acid mine drainage. Albert Silver Mine conducted mining of the silver-sulfide bearing ore from 1885 to 1914. However, at the time, little attention was being given to acid mine water generation. This …
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Tolerance of selected crops to gypsiferous water originating in coal mines
The disposal of gypsiferous water, generated in coal mining operations, has become a problem in the Mpumalanga Highveld region in South Africa. As part of an investigation into the feasibility of using this water for irrigation, sand and water culture experiments were conducted in a glasshouse and …
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Surface Water Impacts from Active Underground Mining
… the impact of underground mining on surface waters, physically and chemically. The SDPS program is used to conduct an analysis of ground movements to assess optimal barrier pillar size for stream protection. Typical analytical and empirical methods used in mine planning were compared against …
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Bioprospecting of plants species with potential to uptake inorganic chemical species from gold mine tailings and acid mine drainage
… This is due to the exposure of sulphide-bearing minerals such as pyrite (FeS2) to oxygenated water during and after the extraction of ore deposits which results in the formation of acid mine drainage (AMD). Acid mine drainage is characterised by low pH ranging between 1-4, high concentration of …
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Enhanced Microbial Sulfate Removal Through a Novel Electrode-Integrated Bioreactor
… Minnesota, elevated levels of sulfate in freshwater systems is a topic of great interest, due to potential adverse impacts to wild rice ecosystems. Sulfate may contribute to methylmercury production and eutrophication in certain conditions. Increased interest has emerged for developing low cost …
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Biosynthesis of copper nanoparticles using a bioflocculant from Alcaligenis faecalis, characterization and its application
… efficient removal of pollutants in the area of water purification. Most common method used for nanoparticles formation such as physical (condensation evaporation) and chemical (oxidation and reduction) are very efficient traditional methods. However, both methods have been found to have some …
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The effect of microbial load and water recycling on the flotation performance of a PGM bearing ore
Mineral processing requires large quantities of water for its operations. With the continuing move to reduce freshwater withdrawal and mine water discharge, the mineral industry has been applying water recycling and reuse to improve water use efficiency. Previous studies on the use of remediated …
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Mineral Scale Buildup on Lined Versus Traditional Polyethylene Pipe Materials Subjected to Mine Influenced Waters
Mine influenced waters (MIW) pose a broad range of potential environmental impacts, which often also carry financial and social consequences. MIWs are often high in solids content, and can have highly acidic or alkaline pH and high contents of metals or other problematic constituents (e.g., traces …
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