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推进选择性萃取：一种用于钪、钍和铀离子捕获的新方法。

Advancing Selective Extraction: A Novel Approach for Scandium, Thorium, and Uranium Ion Capture.

作者信息

Protsak Iryna, Stockhausen Martin, Brewer Aaron, Owton Martin, Hofmann Thilo, Kleitz Freddy

机构信息

Department of Functional Materials and Catalysis University of Vienna Währinger Straße 42 1090 Vienna Austria.

Department for Environmental Geosciences, Centre for Microbiology and Environmental Systems Science University of Vienna Josef-Holaubek-Platz 2 1190 Vienna Austria.

出版信息

Small Sci. 2024 Aug 28;4(10):2400171. doi: 10.1002/smsc.202400171. eCollection 2024 Oct.

DOI:10.1002/smsc.202400171
PMID:40212251
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11935155/
Abstract

The potential use of thorium (Th) and uranium (U) as nuclear fuels underscores the importance of developing materials for their sustainable recovery. The production of Th and U requires the separation of these elements from rare-earth elements (REEs) as they often coexist in various feedstocks. Equally crucial is efficiently isolating scandium (Sc) from REEs, considering its high-value status and pivotal role in advanced alloy technologies. This study introduces a new selective ligand-functionalized silica sorbent for extracting Sc, other REEs, Th, and U from solutions with varying pH and elemental compositions. The functionalized sorbent exhibits exceptional selectivity for Sc ions at pH 4 across solutions containing 3-20 elements. It also shows excellent selectivity for Th at pH 2 in 18- and 20-element solutions and substantial selectivity for U in 18- and 20-element solutions at pH 4. Additionally, it efficiently adsorbs neodymium (Nd), dysprosium (Dy), and lanthanum (La) in Sc-free solutions with a given preference for Nd. The ligand-functionalized sorbent successfully undergoes ten cycles of reuse which along with its enhanced recovery performance toward targeted elements highlights its industrial application potential.

摘要

钍（Th）和铀（U）作为核燃料的潜在用途凸显了开发可持续回收其材料的重要性。钍和铀的生产需要将这些元素与稀土元素（REEs）分离，因为它们经常共存于各种原料中。考虑到钪（Sc）的高价值地位及其在先进合金技术中的关键作用，从稀土元素中有效分离钪同样至关重要。本研究介绍了一种新型的选择性配体功能化硅胶吸附剂，用于从不同pH值和元素组成的溶液中提取钪、其他稀土元素、钍和铀。这种功能化吸附剂在pH值为4时，对含有3 - 20种元素的溶液中的钪离子表现出优异的选择性。在pH值为2的18元和20元元素溶液中，它对钍也表现出优异的选择性，在pH值为4的18元和20元元素溶液中对铀表现出显著的选择性。此外，它能在不含钪的溶液中有效吸附钕（Nd）、镝（Dy）和镧（La），对钕有一定的偏好。这种配体功能化吸附剂成功地进行了十次重复使用循环，其对目标元素的回收性能增强，突出了其工业应用潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34b5/11935155/cdcfbeb618ae/SMSC-4-2400171-g004.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34b5/11935155/da13d5a1734e/SMSC-4-2400171-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34b5/11935155/644f598f4221/SMSC-4-2400171-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34b5/11935155/311af012aa1d/SMSC-4-2400171-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34b5/11935155/4e0571d20684/SMSC-4-2400171-g006.jpg
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