在水热 REE 矿物中氧化状态和的积累
Tobias G Bamforth1, Barbara Etschmann2, Joël Brugger2
1Sustainable Geochemistry and Mineral Sciences, Harry Butler Institute, Murdoch University, Perth, Western Australia 6150, Australia; Commonwealth Scientific and Industrial Research Organisation (CSIRO), Kensington, Western Australia 6151, Australia; School of Earth, Atmosphere & Environment, Monash University, Clayton, Victoria 3800, Australia.
Journal of hazardous materials
|November 25, 2025
概括
可持续的稀土元素 (REE) 提取需要了解矿石中的 (U) 积累. 这项研究揭示了氧化可以纳入REE矿物质,如拉布多芬和莫纳,与此前的信念相反.
科学领域:
- 地质化学 地质化学
- 矿物学是什么?矿物学是什么?
- 环境科学 环境科学
背景情况:
- 对于用于可再生技术的稀土元素 (REEs) 的日益增长的需求需要可持续的采购.
- (U) 是REE矿石中的一个有问题的杂质,在开采和加工过程中带来社会环境挑战.
- 了解REE矿物中的U积累对于确定低U矿石矿床和确保可持续的REE开采至关重要.
研究的目的:
- 研究在常见的热水REE矿石矿物中积聚的条件.
- 挑战现有的理解,即将U纳入REE矿物中需要降低条件.
- 开发一个框架来预测REE沉积物中的U积累,并评估它们的环境可持续性.
主要方法:
- 分析拉布多芬和莫纳,两种常见的热水REE矿石矿物质.
- 研究这些矿物质中的合并机制.
- 在水热REE矿石中积聚U的四个氧化还原场景的理论建模.
主要成果:
- 拉布多芬和莫纳可以结合氧化,特别是U (V) 和U (VI) 形式.
- 与先前的理解相反,减少条件对于U在这些热水REE矿物中积累并非必不可少.
- 在氧化和/或贫流体中U的可用性更高可以显著推动U的积累.
结论:
- 这项研究重新定义了水热REE矿物质中U积累的理解,强调了氧化条件的作用.
- 提出了一个新的理论框架来预测REE矿石中的U积累,帮助环境可持续性评估和指导勘探/开采战略.
- 拉布多芬和莫纳显示出具有固定可溶性U(VI的潜力,这表明它们可以在受U污染的环境中作为矿物屏障的应用.
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