In this thesis, it is aimed to design lithium extraction from boron clays using statistical design of experiments and robust design methodologies. There are several factors affecting extraction of lithium from clays. The most important of these factors have been limited to a number of six which have been gypsum to clay ratio, roasting temperature, roasting time, leaching solid to liquid ratio, leaching time and limestone to clay ratio. For every factor, three levels have been chosen and an experiment has been designed. After performing three replications for each of the experimental run, signal to noise ratio transformation, ANOVA, regression analysis and response surface methodology have been applied on the results of the experiments. Optimization and confirmation experiments have been made sequentially to find factor settings that maximize lithium extraction with minimal variation. The mean of the maximum extraction has been observed as 83.81% with a standard deviation of 4.89 and the 95% prediction interval for the mean extraction is (73.729, 94.730). This result is in agreement with the studies that have been made in the literature. However / this study is unique in the sense that lithium is extracted from boron clays by using limestone directly from the nature, and gypsum as a waste product of boric acid production. Since these two materials add about 20% cost to the extraction process, the results of this study become important. Moreover, in this study it has been shown that statistical design of experiments help mining industry to reduce the need for standardization.

Lithium is one of the most strategically important minerals at the time of writing. The demand for lithium and lithium compounds to be used in lithium-ion batteries is increasing day by day. Zimbabwe possesses a considerable resource of lithium ore, estimated at 23 000 mt Li. Beneficiation of this lithium ore could indeed be a very promising business in the near future. This work focuses on processing of petalite concentrate from the Bikita deposit in Zimbabwe for production of Li2CO3, with subsequent preparation of LiF and LiCl. Analysis performed on the petalite showed that the average Li2O content is 4.10 %. The extraction method used involves roasting the pre-heated concentrate with concentrated H2SO4 followed by water leaching of the resulting Li2SO4, solution purification and precipitation of Li2CO3 with subsequent preparation of LiF and LiCl. Investigation of the roasting and leaching showed that the dissolution rates are significantly influenced by roasting temperature and stirring speed. 97.3 % optimum rate of extraction was attained at 320 rpm and roasting temperature of 300 C. Water-washed lithium carbonate with a purity of 99.21 %( metal basis) and an average particle size of 1.4 ìm was produced. Good quality LiF and LiCl can be produced with purity of 99.36 % and 99.02 % respectively. The pH, concentration and agitation have a great influence on the morphology of the precipitated LiF. Lower pH values and optimum concentration of the Li2CO3 solution results in smaller particle size. High recovery of 96.53 % LiF was realised. Anhydrous LiCl was found to absorb moisture when exposed to air at ambient temperature. The synthesised LiCl melts at 606.2 C with a corresponding enthalpy of fusion of 18.4 kJ mol-1, close to the values reported in the literature. Copyright / Dissertation (MSc)--University of Pretoria, 2012. / Chemical Engineering / unrestricted

The extraction of lithium, a crucial mineral for the production of batteries in the rapidlyexpanding electric vehicle and renewable energy sectors, has gained significant attention due toits environmental and social implications. This thesis provides a comprehensive literature reviewon the environmental and social challenges associated with lithium extraction from the LithiumTriangle countries, namely Argentina, Bolivia, and Chile, through the lens of political ecology.Drawing upon a wide range of scholarly articles, reports, and case studies, this research examinesthe complex interplay between ecological dynamics and sociopolitical factors in the context oflithium extraction. The literature review explores key themes including land use conflicts, waterscarcity and pollution, indigenous rights and participation, governance and regulation, and globalmarket dynamics. The literature review reveals that lithium extraction in the Lithium Trianglecountries presents various environmental challenges. These include the large-scale use of waterresources, potential water contamination from mining activities, and the disruption of fragileecosystems. From a political ecology perspective, the review highlights the power dynamics andpolitical-economic structures that shape the governance of lithium extraction. It criticallyanalyzes the role of multinational corporations, government policies, and international marketforces in influencing the environmental and social outcomes of lithium mining operations.Furthermore, the review emphasizes the importance of recognizing and incorporating theperspectives and rights of local communities and indigenous groups in decision-makingprocesses. By adopting a political ecology perspective, it underscores the need for sustainable andsocially just approaches to lithium mining that prioritize environmental conservation, communityengagement, and equitable distribution of benefits. The findings of this literature review caninform future research, policy development, and advocacy efforts aimed at promoting responsibleand inclusive practices in the lithium industry. / Lithium utvinning, en nyckelkomponent i elbils- och förnybar energisektorns framväxt, haruppmärksammats för dess påverkan på miljö och samhälle. Denna avhandling utför enomfattande litteraturgenomgång om miljö- och samhällsutmaningar vid litiumutvinning i LitiumTriangel-länderna: Argentina, Bolivia och Chile. Genom att analysera en bred samlingvetenskapliga artiklar, rapporter och fallstudier utforskar studien det komplexa samspelet mellanekologi och sociopolitisk vid litiumutvinning. Litteraturgenomgången utforskar centrala ämnensom markkonflikter, vattenbrist och föroreningar, ursprungsbefolkningars rättigheter ochdeltagande, styrning och globala marknadskrafter. Resultaten avslöjar miljöutmaningar vidlitiumutvinning i Triangel-länderna, inklusive vattenanvändning, förorening ochekosystemstörningar. Genom ett politiskt ekologiskt perspektiv belyser översikten maktstruktureroch påverkan från multinationella företag, regeringspolitik och internationella marknadskrafter.Översikten understryker även vikten av att inkludera lokalbefolkningens ochursprungsbefolkningars perspektiv och rättigheter i beslutsprocesser. Studien främjar hållbara ochrättvisa tillvägagångssätt för litiumutvinning och visar att resultaten kan påverka framtidaforskning, policyutveckling och påverkansarbete för ansvarsfulla och inkluderande metoder inomlitiumindustrin.

This thesis examines the intersection between lithium extraction and contemporary art through a visual semiotic analysis of three contemporary artworks: Unknown Fields’ We Power Our Future With the Breast Milk of Volcanoes, Marcela Magno’s Land [2] Litio, and Julian Charrière’s Future Fossil Spaces. It explores how lithium extraction is visualised in the selected artworks, what connotations can be extracted from them, the geopolitical dimension expressed in them, and how they relate to the myth of ‘green’ transition. This text takes a starting point in the notion of critical visualisations of extractivism in contemporary art as an urgent political, artistic, and ecological issue. Extractivism is a crucial concept in this thesis, and it is further explored through the intersection of art and extractivism in dialogue with previous research by, for example, Eray Çaylı, Macarena Gómez-Barris, and T.J. Demos. The artworld’s interest in lithium has grown in the last years, with cultural projects and exhibitions on lithium taking place in Sweden and the Netherlands, yet there are no academic texts that explore the intersection of lithium extraction and contemporary art. The aim of this thesis is to thoroughly examine this intersection through three contemporary artworks, to expand academic literature regarding this topic, but also to make the results available to curators, cultural workers, and artists who are currently developing cultural projects around lithium and its extraction. The results of the visual semiotic analysis demonstrated that all three of the artworks critically engaged with lithium extraction by visibilising either present or future green sacrifice zones. They all countered the myth of ‘green’ transition with different strategies: by showing the two-furthermost-apart links in the lithium supply chain, by recuperating Indigenous creation myths of the extracted landscapes, and by exploring the supposed intangibility of our ever-expanding digital world.