设计安全可持续的MOF微珠用于稀土元素的选择性捕集和回收。

IF 11.3 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Prathmesh Bhadane, Pankti Dhumal, Emilie Brun, Andrew Britton, Iseult Lynch and Swaroop Chakraborty*, 
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引用次数: 0

摘要

我们报道了CA-BNMG-1复合球-醋酸纤维素大珠嵌入纳米咪唑铜mof (BNMG-1)的发展-通过非溶剂诱导相分离工程用于从复杂的水环境中选择性回收稀土元素(REEs)。这种封装策略确保了均匀的MOF分散,增强了机械完整性,并最大限度地减少了Cu(II)的浸出(<1%),满足了设计的安全和可持续发展(SSbD)标准。CA基体不仅可以减轻铜毒性,还可以在固定床系统中轻松处理、可回收和可扩展部署。在10-REE标准溶液和两个模拟废物流中的吸附研究表明,与原始BNMG-1相比,稀土选择性显著提高。Yb(III)对Mn(II)、Ni(II)和Na(I)的分离系数分别达到194.5、325.8和339;Eu(III)的SFs分别为155.5、260.5和271.2。在使用温和酸性洗脱液的多次吸附和单次解吸循环中,微球保持了95%以上的吸收能力,证实了优异的可重复使用性和结构稳定性。这项工作提出了一个强大的、低毒性的、可扩展的稀土回收平台,将吸附性能与环境安全相结合。CA-BNMG-1矿珠提供了一种令人信服的溶剂萃取替代方案,具有整合循环经济战略的潜力,目标是从电子废物、矿山尾矿和工业废水中回收稀土元素,解决资源安全和可持续性挑战。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Safe and Sustainable by Design MOF Beads for Selective Entrapment and Recovery of Rare Earth Elements

We report the development of CA-BNMG-1 composite beads-cellulose acetate macrobeads embedded with nanosized copper imidazolate MOFs (BNMG-1) -engineered via nonsolvent-induced phase separation for the selective recovery of rare earth elements (REEs) from complex aqueous environments. This encapsulation strategy ensures uniform MOF dispersion, enhanced mechanical integrity, and minimized Cu(II) leaching (<1%), fulfilling the Safe and Sustainable by Design (SSbD) criteria. The CA matrix not only mitigates copper toxicity but also enables facile bead handling, recyclability, and scalable deployment in fixed-bed systems. Adsorption studies across a 10-REE standard solution and two simulated waste streams demonstrated significantly improved REE selectivity over pristine BNMG-1. Separation factors (SFs) for Yb(III) over Mn(II), Ni(II), and Na(I) reached 194.5, 325.8, and 339, respectively; Eu(III) showed SFs of 155.5, 260.5, and 271.2. The beads retained over 95% of their uptake capacity across multiple adsorption and single desorption cycles using mild acidic eluents, confirming excellent reusability and structural stability. This work advances a robust, low-toxicity, and scalable REE recovery platform that integrates adsorptive performance with environmental safety. CA-BNMG-1 beads offer a compelling alternative to solvent extraction, with potential for integration into circular economy strategies targeting REE recovery from e-waste, mine tailings, and industrial effluents-addressing both resource security and sustainability challenges.

The Safe and Sustainable by Design framework is applied to develop MOF-polymer beads for rare earth element entrapment and recovery, ensuring high selectivity, reduced toxicity, and environmental safety, supporting circular economy and resource sustainability.

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来源期刊
环境科学与技术
环境科学与技术 环境科学-工程:环境
CiteScore
17.50
自引率
9.60%
发文量
12359
审稿时长
2.8 months
期刊介绍: Environmental Science & Technology (ES&T) is a co-sponsored academic and technical magazine by the Hubei Provincial Environmental Protection Bureau and the Hubei Provincial Academy of Environmental Sciences. Environmental Science & Technology (ES&T) holds the status of Chinese core journals, scientific papers source journals of China, Chinese Science Citation Database source journals, and Chinese Academic Journal Comprehensive Evaluation Database source journals. This publication focuses on the academic field of environmental protection, featuring articles related to environmental protection and technical advancements.
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