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 12 of 12 for “"Acid Base Accounting"”.
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Characterizing the geochemical reactions in overburden waste pile : Synerude Mine Site, Fort McMurray, Alberta, Canada
… sulphide-bearing salinesodic overburden include acid-mine drainage and salinization of surface soils. Acid-mine drainage may result from the production of sulphuric acid during the oxidation of sulphide minerals. Acid production during the oxidation of sulphide minerals may also increase the …
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Chemistry of the drainage from a waste dump at BHP-Utah Mines Ltd, Island Copper mine
… the pathway of water from precipitation and the acid generation and consumption of some areas on the North Dump. Information used in this study includes mine site fresh water quality monitoring records, acid-base accounting results of the North Dump drilling samples, flow rate measurements of …
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Determining a Total Dissolved Solids Release Index from Overburden in Appalachian Coal Fields
… identify, handle, treat and isolate potentially acid-forming overburden materials at coal mines in the region. However, the techniques to predict acid mine drainage potential may not adequately predict the release of total dissolved solids (TDS). High concentrations of TDS have been linked to a …
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Evaluation of Leachate Chemistry from Coal Refuse Blended and Layered with Fly Ash
… liming agent within coal refuse fills to reclaim acid-forming refuse. Previous studies focused on bulk blending ash with acid-forming (pyritic) refuse. A better representation of field conditions is a "pancake layer" of ash above the refuse. A column study was initiated to evaluate the leachate …
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Application of mineralogy in the interpretation of laboratory scale acid rock drainage (ARD) prediction tests : a gold case study
… that when exposed to air and water react to form acid, which results in acid rock drainage (ARD). ARD is usually associated with low pH, high sulfate content and elevated concentrations of toxic elements. The mobility of ARD affects our scarce water resources, land and aquatic species. Methods …
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Hydrometallurgical processing of nickel sulfides with activated carbon in sulfuric acid medium
… by integrating geochemical characterization, acid mine drainage assessment, leachability studies (with oxidants, organic and inorganic acids), as well as redox‑controlled hydrometallurgical processing using activated carbon to enable sustainable metal recovery. The research begins with a …
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Combining froth flotation and reflux classification to mitigate ARD generating potential of the Waterberg and Witbank coal ultrafines via sulfide removal
… to adverse environmental effects such as acid rock drainage (ARD). The University of Cape Town (UCT) has developed a two-stage flotation process, which involves coal flotation in the first stage and pyrite flotation of the tailings in the second stage, for mitigating the ARD potential of …
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Evaluation of Sulfidic Materials in Virginia Highway Corridors
… materials in Virginia has resulted in localized acid rock drainage (ARD) that threatens water quality, fill stability, integrity of building materials, and vegetation management. The objectives of this study were: i) to develop a state-wide sulfide hazard rating map based on characterization of …
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Lithostratigraphic and Geochemical Characterisation of the Waterberg Coalfield: Implications to Acid Mine Drainage, Limpopo Province, South Africa
… 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, Scanning electron microscopy, X-ray diffraction spectroscopy, X-ray fluorescence spectroscopy, proximate analysis, Modified …
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Characterizing the potential environmental risks of South African coal processing wastes
… to Eberhard (2011). Whilst the fossil fuel-based industry is in decline globally, coal is likely to remain the dominant source of power in South Africa. The major environmental impacts reported in several studies are water pollution and soil quality degradation due to acid rock drainage …
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Development of co-disposal methods for coal discards and fine waste for the prevention of acid mine drainage
… when oxidised may lead to the generation of acidic and toxic discharge. A deficit of naturally occurring neutralising minerals to counteract this acidic discharge results in acid rock drainage (ARD). Far reaching consequences on water systems, vegetation, people and wildlife ensue as a …
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Quantifying texture for acid rock drainage characterisation and prediction
… host of environmental problems. One of these is acid rock drainage (ARD), which forms through a complex series of acid formation (mainly via sulfide oxidation), neutralisation (primarily by carbonates) and gangue mineral dissolution reactions in waste rock and tailings storage piles. The …