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在南加州海收集的沙子中发现稀土元素

Biraj Saha¹, Kira Eliason¹, Debasis Golui²

¹Department of Civil, Construction and Environmental Engineering, North Dakota State University, Fargo, ND, 58102, USA.

|September 24, 2023

概括

南加州的沙含有宝贵的稀土元素 (REEs),为这些关键资源提供了潜在的二次来源. 磁分离证明有效地提取富含REE的化合物,而不会造成环境污染.

科学领域:

环境科学环境科学
地质化学地质化学
材料科学材料科学材料科学

背景情况:

稀土元素 (REEs) 对于清洁技术和电子产品至关重要.
全球REE储备有限,需要对非传统和次要来源进行调查.
南加州的海是一个潜在的,但在很大程度上尚未探索的二次 REE 源.

研究的目的:

调查来自南加州七个海的湿沙和干沙中的16个REEs的度和分布.
评估沙沙作为可再生能源回收的可行次要来源的潜力.
为了评估与REE和重金属度相关的生态风险,研究的沙子.

主要方法:

磁性分离被用来从沙子样本中分离含有REE的磁性化合物.
使用已确定的分析技术量化16个REE (轻,中,重).
分析占主导地位的重金属和矿物组成 (石英,石,伊尔梅尼特,石).

主要成果:

发现了REE的显著度,总REE含量在1168.1至7483.8μg/kg之间.
(Ce) 和 (Y) 是最丰富的REEs,轻的REEs占总量的70-80%.
REE度在海之间显示出显著的差异,但有很强的相关性,表明了共同的来源. 没有发现任何生态风险.

结论:

南加州的海沙是可再生能源的潜在次要来源,磁性分离提供了一种高效的回收方法.
已识别的REEs和重金属不构成生态风险或污染问题.
进一步研究从这些沙中提取REE是有必要的,因为它们的度很有希望,容易分离.

关键词:

生态风险生态风险磁分离器的磁性分离方式海洋沉积物的海洋沉积物自然丰富是自然的丰富.在 REE 中, REE 是 REE.资源回收利用的方法

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