从碳酸盐和酸盐矿物质中通过有机质介导稀土元素 (REEs) 的溶解和分离
Yinghao Wen1, Pan Liu1, Qian Wang1
1School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332, United States.
ACS earth & space chemistry
|May 22, 2024
概括
像酸盐和desferrioxamine B这样的有机配体从矿物中调动稀土元素 (REEs). 这项研究澄清了REE与有机配体的行为,有助于绿色提取技术的发展.
科学领域:
- 地质化学 地质化学
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 稀土元素 (REEs) 对低碳技术至关重要,需要对它们的自然存在和提取进行研究.
- 了解REE与有机配体的地化学行为对于开发可持续的REE资源和绿色提取方法至关重要.
研究的目的:
- 研究由常见有机连接体诱导的来自宿主矿物质的REEs的调动和分化.
- 阐明有机联体介导的REE溶解的机制,并确定影响这些过程的因素.
主要方法:
- 在受控的pH条件下,利用氧酸盐,酸盐和desferrioxamine B (DFOB) 来从矿物中溶解REEs的实验.
- 热力学建模用于预测REE-合体复合体稳定性和主导溶解机制.
- 在溶液中分析 REE 分割模式,特别是重型 REE (HREE) 的丰富.
主要成果:
- 酸盐显著增强了REE溶解,DFOB轻微促进了它,而氧酸盐则根据矿物质类型和pH值表现出可变的影响.
- 热力学建模证实了REE-连接体复合物的形成,并支持连接体促进溶解作为主要机制.
- 观察到有利于HREEs的明显分离,归因于更稳定的HREE-连接体复合体.
结论:
- 有机配体在自然系统中的REE调动和分化中发挥着重要作用.
- 这些发现为研究REE在环境中的行为和设计高效,绿色的REE提取技术提供了框架.
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