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 11 of 11 for “"Critical metals"”.
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Behaviour of Critical Metals During Smelting of Copper Concentrates from Olympic Dam Plant, South Australia
… the content and behaviour of selected critical elements in slags,: rare earths elements (REE), Co, Ni, Ti, Nb, and V. Whereas Co and Ni are inherently present as minor elements within Cu-(Fe)- sulphides, these minerals are intrinsically intergrown with REE-U-bearing minerals, as well as …
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Trace element distributions and partitioning trends in hydrothermal base metal sulphide ores comprising sphalerite, galena, chalcopyrite and tetrahedrite-tennantite
… to this recognized in the study are the critical metals Ga, In and Sn in assemblages recrystallized at high metamorphic grades. Observed partitioning patterns can be used to assess whether a particular BMS assemblage cocrystallized. Compared to sphalerite and galena, trace element …
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Non-traditional sources of critical minerals from the Western Canada Sedimentary Basin
… will be immense, requiring new sources of critical metals required in clean energy technologies. Among the most important of these are the rare earth elements (REE) and lithium (Li). The REE, which include the lanthanide elements and yttrium (Y), are currently produced from peralkaline …
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Critical Material Recovery from Salt-Lakes and Spent Batteries with Membranes and Solvents
The sustainable extraction and recovery of critical metals such as lithium, cobalt, and rare earth elements are essential for advancing renewable energy technologies, electric vehicles, and modern electronics. This thesis addresses the significant environmental, economic, and logistical challenges …
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Multiscale development of electrochemical separations: from molecular design of redox-moieties to interfacial characterization and process simulation
… separations challenges, such as the recovery of critical materials from low-grade sources, the environmental remediation of trace pollutants from water, and the improvement of downstream separations in chemical manufacturing, highlight the need for novel approaches with lower energy consumption, …
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Hydrometallurgical processing of nickel sulfides with activated carbon in sulfuric acid medium
… inunprecedented demand for nickel and associated critical metals such as copper, cobalt, manganese, and chromium. Though primary mining remains the dominant supply pathway, increasing scrutiny of environmental impacts, declining ore grades, and resource inefficiencies have intensified interest in …
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Rare metal resources in polymetallic nodules from the Eastern Equatorial Pacific Ocean
… crustal composition) in economically important metals such as Mn, Ni, Cu, Zn, and so-called critical metals such as Co, Rare Earth Elements and Y (REYs). This project involves the geochemical and mineralogical investigation of nodules from five box cores from the UK claim area in the CCFZ. Bulk …
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Magmatic-hydrothermal critical ore systems: identifying fluid sources and tracing fluid evolution
Critical metals are essential to the economy and national defense. However, many critical metal systems are not understood as well as traditional deposits (e.g. porphyry systems). Furthermore, their sources and formation processes are debated. This dissertation investigates how …
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Physics-informed Deep Learning and Differentiable Mechanistic Models for Multicomponent Transport Phenomena
A large subset of critical metals in today’s world occur in abundance across diverse bodies of water. For example, 83% of global lithium reserves are found in salt lakes and geothermal brines. Harvesting these metals, however, is often a separations challenge due to the presence of other solutes …
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GREEN METHODS BASED ON ECO-FRIENDLY LIXIVIANTS FOR CRITI-CAL METAL RECOVERY FROM TUNGSTEN INDUSTRIAL SCRAPS
… new recycling methods for the recovery of critical metals from hard metal (HM) wastes, based on the use of functional and eco-friendly organic ac-ids in a hydro- or solvometallurgical leaching system. The thesis is presented as a collection of research products (3 articles and 1 patent), …
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Magmatic and volcanic processing of volatile and chalcophile elements
… led to an unprecedented rise in the demand for critical metals, including several chalcophile elements such as copper, selenium, and silver. Copper in particular is essential – it is a key component in wind and solar technologies, as well as energy storage systems, all of which are central to …