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 7 of 7 for “"Metal ores"”.
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The geology of the Eldorado Mining District, Clark County, Nevada
… economic favorability for production of precious metal ores in the United States. The years of greatest production were 1939, 1940, 1941 and 1942. Production was stopped in October 1942 by U.S. Government order WPB-L208 and has not been resumed.</p> <p>The economic mineral deposits occur within …
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Trace element distributions and partitioning trends in hydrothermal base metal sulphide ores comprising sphalerite, galena, chalcopyrite and tetrahedrite-tennantite
… and distributions in hydrothermal base metal sulphide (BMS) ores using samples from a wide variety of ore deposits and conditions of ore formation. The ranges of trace elements that can be incorporated into natural sphalerite, galena, chalcopyrite and tetrahedrite-tennantite are …
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The effect of recycle water quality on the flotation of a Platreef ore
… (6.1%), agricultural (62%), energy (2%), forestry (3%), industrial sectors (3%), and domestic (27%) (Askham & Van der Poll, 2017). There is therefore a need for the mining sector to reassess its water usage with a view to not only understanding water footprint but also ensuring maximum …
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The Technology of Ancient and Medieval Directly Reduced Phosphoric Iron.
… smelting (direct reduction) processes, such rock ores would be predicted to produce phosphoric iron, and bog iron ores even more so. Ore-metal-slag phosphorus ratios for bloomery iron are derived here, by means of: laboratory experiments; full-scale experimental bloomery smelting; and analysis of …
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Cadmium and lead concentrations in livers and kidneys of cattle slaughtered at Grootfontein abattoir in Namibia
… Grootfontein area of Namibia has extensive base-metal ore reserves, which were and are still extracted and processed in localities used as livestock pastures. Namibia is also an arid country which predominantly uses borehole water for livestock and human consumption. These underground water …
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Bioaccumalation of metals in mullet from Mhlathuze Estuary and the effect of Cu and Pb on the uptake kinetics,haematology and acid-base balance of Liza dumerelii.
… Bay area. The industries manufacture a number of metal products and also utilise other metal ores in the manufacturing process. The high population growth and concentration of industries in the area have a potential to pollute the sanctuary and the nearby harbour. Research was undertaken to assess …
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THE SHORT- AND LONG- TERM EFFECT OF ZINC AND COPPER CONTAMINATION ON SOIL MICROBIAL FUNCTIONS
… health. The inadvertent release of trace metals into soil ecosystems through their extraction, processing, and use of metal ores has led to elevated soil trace metal concentrations worldwide. To preserve soil ecosystem functions and soil health, soil regulatory limits that define …