Deep eutectic solvents for the leaching of technology metals from oxide minerals

用于从氧化物矿物中浸出技术金属的低共熔溶剂

• 批准号: 2579401
• 金额: --
• 依托单位: UNIVERSITY OF EXETER
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2579401
• 关键词: Deep; eutectic; solvents; leaching; technology

Lime dosing in a high-density sludge (LD-HDS) process is amongst the most widely applied acid mine drainage (AMD) treatment process worldwide. An intrinsic issue of the LD-HDS process is the formation of an ecotoxic metal(loid) bearing ochre waste product. Such waste is a major liability and requires long-term management to prevent major environmental and/or human health impact. In the UK alone approximately 4500 tonnes of ochre (dry) are produced per year, most of which are disposed in landfill. Landfill disposal costs for ochre are between £79-129 per tonne at 50% solids (Sapsford et al., 2015). Similar situations exist in countries around the world. This lack of technology is therefore a major environmental issue and barrier stopping mining operations from gaining a social licence to operate worldwide. This PhD project will aim to develop novel techniques utilising "green" solvents to extract specific metals/metalloids from LD-HDS ochres to produce metals and industrial materials of economic value. LD-HDS is underexplored and to date is limited to few preliminary studies (e.g. Crane & Stewart, 2020). A number of industrial partners (First Quantum Minerals, Veolia, and the Coal Authority) have stated a demand for new research in this important area. This PhD enables me to build on this preliminary research and combine this with my background in ascorbic acid research to open up a new area in chemical engineering.

高密度污泥法（LD-HDS）中的石灰投加是世界上应用最广泛的酸性矿山废水（AMD）处理工艺之一。LD-HDS方法的内在问题是形成生态毒性的含金属（类）赭石废物产物。此类废物是一项重大责任，需要长期管理，以防止对环境和/或人类健康造成重大影响。仅在英国，每年就产生约4500吨赭石（干），其中大部分被填埋。赭石的填埋处理成本在50%固体时为每吨79-129英镑（Sapsford等人，2015年）。世界各国都存在类似的情况。因此，缺乏技术是一个重大的环境问题，也是阻碍采矿作业获得在世界范围内作业的社会许可证的障碍。该博士项目旨在开发利用“绿色”溶剂从LD-HDS赭石中提取特定金属/准金属的新技术，以生产具有经济价值的金属和工业材料。LD-HDS的探索不足，迄今为止仅限于少数初步研究（例如，起重机和Stewart，2020）。许多工业合作伙伴（第一量子矿业公司、威立雅和煤炭管理局）都表示需要在这一重要领域进行新的研究。这个博士学位使我能够建立在这个初步的研究和联合收割机这与我的背景，在抗坏血酸的研究，开辟了一个新的领域，在化学工程。