Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 42 for “"mine waste"”.
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Repurposing of mine waste: an alternative management approach to gold tailings in South Africa
The large volumes of waste generated during gold beneficiation are a major pollution concern in South Africa. To remove these potential pollution risks in perpetuity, non-conventional approaches to mine waste management are required which avoid land disposal of “unwanted” material. This …
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Predicting the time related generation of acid rock drainage from mine waste: a copper case study
… rock ores generates large volumes of sulphidic waste that may oxidise in the presence of oxygen and result in the generation of acid rock drainage (ARD). In order to effectively manage the long term effects of ARD, there is a need to reliably quantify the associated impacts and how these impacts …
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REAL TIME MONITORING OF VOLUMETRIC WATER CONTENT IN RECLAIMED MINE WASTE USING CONE PENETRATION - TIME DOMAIN REFLECTOMETRY
Reclamation soil covers over mine waste are designed to store water as a means of controlling water balance in order to support re-vegetation and minimize the net percolation of water into mine waste. Measurement of stored volumes of water in reclamation material is a critical element in monitoring …
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Environmental Impacts of Tin Mine Waste: A Case Study of the Zaaiplaats Tin Mine, Limpopo Province, South Africa
… on the potential impacts of the Zaaiplaats tin mine waste on the environment and on human health. It investigated the heavy metals and their distribution pattern at the Zaaiplaats tin mine. Heavy metals were investigated in the tailings, water and plants found at the mine. A radiation survey was …
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The influence of mine waste contamination on invertebrates and fish in the Methow River Valley, Okanogan County, Washington (U.S.A.)
A study of mine-waste contamination effects on Methow River habitat on the eastern slopes of the north Cascade Mountains in Washington state, U.S.A., revealed trace element impacts on invertebrates and fish. Ore deposits in the area were mined for gold, silver, copper and zinc until the early …
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Effects of maximum particle size and sample scaling on the mechanical behavior of mine waste rock; a critical state approach
… and sample scaling on the mechanical behavior of mine waste rock (MWR) is presented. Materials tested were obtained from a similar location within the open pit of Barrick Gold Corporation's Goldstrike gold mine approximately 60 km northwest of Elko, Nevada. The collected field gradation was scaled …
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Recovery of Critical and Strategic Raw Materials from mine waste: development of a methodology supported by international and Italian case studies
L'abstract è presente nell'allegato / the abstract is in the attachment
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The development of a mathematical model for the bioextraction of the critical raw material magnesium from mine waste using acidithiobacillus caldus
… a model to describe the bioleaching of magnesium mine wastes, ultimately maximising magnesium extraction while minimising reliance on synthetic acid. In the absence of experimental data on the dissolution profiles of the waste, kinetic models were developed to describe the leaching of individual …
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Early-stage design and development of mine waste valorisation technologies with expert input: a case study of South African sulfide-enriched coal waste
Mining and minerals beneficiation typically result in the production of both valuable products and large bodies of waste, which are traditionally disposed of on land and carry environmental and social risks. Circular economy and resource efficiency trends have shifted the focus from disposal to …
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Effect of Coatings on Mineral Reaction Rates in Acid Mine Drainage
… that address the effect of coatings on rates of mineral reactions that occur in acid mine drainage (AMD) environments. The two major projects investigated how diffusion-limited transport of reactants through pore spaces in coatings on mineral grains affects the reaction rate of the underlying …
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Inhibition of iron-oxidizing bacteria in wastes from coal and hard-rock mines using the anti-bacterial agent
The production of acid mine drainage (AMD) is catalyzed by iron-oxidizing bacteria primarily of the species Thiobacillus ferrooxidans. By inhibiting these bacteria, the production of AMD can be greatly reduced. One compound found to be effective in the inhibition of T. ferrooxidans is nitrapyrine. …
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Diffuse Minewater Pollution: Quantification and Risk Assessment in the Tamar Catchment
Abandoned metal mines in the Tamar catchment, south west England, represent a significant threat to surface water quality via generation of acid mine waters. Currently the River Tamar fails environmental quality standards (EQS) established under the Water Framework Directive (2000/60/EC) for …
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Hydrogeology and ground-water quality in the Sanders area, western Puerco River basin, Arizona
… of the Puerco River have been host to uranium mine waste discharge and spoils from a tailings pond failure in 1979. Samples from 42 wells and springs were collected during 1987-88 for inorganic ion and radionuclide analysis. Waters, originating from the Alluvial, Bidahochi, and Chinle aquifers, …
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Vliv fosforečnanů na mobilitu arzenu v kontaminovaných oblastech
… studied were contaminated agricultural soils, mine waste materials, streambed sediments and river waters from a contaminated fluvial system, and synthetic arsenate phases. A number of common methods and techniques used for geochemical and mineralogical investigations were chosen, such as XRD, …
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Bioaugmentation and biostimulation of a South African coal-based Technosol as a mine rehabilitation strategy
… 70 million tonnes of material are added to coal waste dumps in South Africa. To alleviate the environmental and social burdens of unsightly mine waste dumps, improved management of existing discarded materials and new wastes, and fertile soils for land rehabilitation are essential. To achieve …
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Investigation on Revegetation/ Phytoremediation of Campo Pisano abandoned mine area
The contaminated mine tailings rich in toxic metals pose serious environmental threats to the surrounding areas. The reclamation of these mine sites is an economically costly and technically complex process. Phytoremediation is one of the most promising techniques for sustainable, cost-effective …
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Abandoned Mine Land Impacts on Tributaries in the Upper Yakima River Watershed, Eastern Cascades, Washington
Effluent from abandoned mine lands (AMLs) in several drainages in Washington’s Eastern Cascades flows into the Yakima River. Similar sites in Idaho and Colorado are known producers of heavy metals and acid mine drainage. I determined the effects of nine AMLs on water quality in four tributaries to …
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Economic Potential of Rare Earth Elements Within Accessory Minerals of Granitic Pegmatite Mine Tailings
… the economic feasibility of repurposing current mine waste tailings as a rare earth element resource. Spruce Pine is home to several active quartz and feldspar mining operations, with large waste tailing piles generated during the separation process for quartz and feldspar. The mineralogy, …
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Characterizing tailings professional labor demand
… necessitates increased extraction of critical minerals via mining. The act of mining includes not only extraction of commodities, but also management of tremendous volumes of waste. Despite the need for mining to support green technologies, mining is experiencing a credibility crisis due to …
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