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 10 of 10 for “"artisanal and small-scale gold mining"”.
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Identifying strategies for effective artisanal and small-scale gold mining interventions in Kadoma-Chakari, Zimbabwe
This thesis examines historical and contemporary artisanal and small-scale gold mining (ASGM) in Kadoma-Chakari, Zimbabwe in order to identify effective strategies to reduce mercury loss and exposure and to increase miners’ incomes by improving gold recoveries. Cyanidation of mercury-rich tailings …
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A study of alternative techniques to mercury amalgamation for gold extraction in artisanal and small-scale gold mining
Artisanal and small-scale gold mining (ASGM) has many definitions depending on the context. However, the common theme that characterises gold mining operations that fall within this category is that they make use of rudimentary methods to mine and process gold. The ASGM sector is a source of …
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Determinants and Implications of Chinese Involvement in Informal Artisanal and Small-scale Gold Mining in Ghana: Perspectives from the Grassroots
Despite the increasing relevance of artisanal and small-scale mining (ASM) in poverty reduction in Ghana and in the nation’s mineral production, this mining branch also presents huge environmental and social challenges due to weak regulation. Over the last decade, the proliferation of Chinese gold …
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Assessing the role of top-down techniques for improving regional estimates of artisanal and small-scale gold mining mercury emissions
… largest source of anthropogenic Hg emissions and is common in Latin America, Sub-Saharan Africa, South Asia, and East Asia. However, the amount of mercury emitted from ASGM and contributing to global mercury emissions is subject to substantial uncertainty. Bottom-up studies have quantified …
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Rise of mercury emissions in the Amazon rainforest: an evaluation of artisanal and small-scale gold mining and biomass burning sources
… to the atmosphere are biomass burning (BMB) and artisanal and small-scale gold mining (ASGM) operations. These activities, prevalent in the Amazon rainforest, are driven by agricultural and cattle ranching expansion and rising international gold prices, respectively. Although there are …
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A Study Of Cyanide-Glycine Synergistic Lixiviant And The Igoli Process As Suitable Replacements For Mercury Amalgamation In Artisanal And Small-Scale Gold Mining
Artisanal and Small-scale Gold Mining (ASGM) operations are characterized by the use of rudimentary tools and technologies owing to limited access to capital. ASGM is predominantly a poverty-driven exercise practiced as a source of livelihood, typically in rural communities where people lack other …
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The needs of miners: political ethics, mercury abatement, and intervention in artisanal gold mining communities
… projects to reduce mercury pollution from artisanal and small-scale gold mining (ASM). ASM is the second largest source of anthropogenic global mercury pollution, accounting for roughly 1000tonnes of atmospheric emissions and releases to the environment per annum. The artisanal mining …
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Socio-technical assessment of mercury and gold losses in artisanal and small-scale mining (ASM) operations in Colombia, A
In Colombia, the artisanal and small-scale gold mining (ASGM) sector represents about 70% of the mining activities, and approximately 80% of Colombia’s gold comes from this sector. In addition, the ASGM sector in Colombia releases about 90 tons of mercury per year. Although the Colombian government …
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From Source to Surveillance: An Assessment of Liquid Elemental Mercury Mobilization in Soil, Downstream Reactivity, and Biomarkers of Exposure
… whose speciation will highly impact its fate and transformation in the environment. One understudied form is that of liquid elemental mercury (Hg0L), a dense non-aqueous phase liquid which, upon release to the environment, can persist in soil for decades. Over time, this residual Hg0L is …
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Impacts of artisanal and large scale gold mining on tropical rivers in West Africa: A case study from the Brong Ahafo Region of Ghana
Mining communities in more than 70 developing countries, mostly in the tropical regions, still practise artisanal and small scale gold mining (ASGM). ASGM commonly operates along rivers and streams for easy access to process water and as receptacles for mine water discharges. A largely unregulated …