Phosphine-functionalized aluminum-based metal organic framework for ultra-fast and selective thorium capture from rare earth contaminated wastewater

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation Pub Date : 2025-08-14 DOI:10.1016/j.eti.2025.104442

Shuai Sun , Kai Jia , Ge Cheng , Lei Shi , Qiuhong Zhou

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引用次数: 0

Abstract

Thorium, a radioactive nuclide, commonly accompanies rare earth minerals. The wastewater generated during the mining and processing of these ores poses significant risks to the environment and public health. Therefore, efficient adsorbents for removing thorium are crucial in the recent research. This study synthesized a novel dimethylphosphine functionalized Al-based metal organic framework (CAU-PMIDA) and evaluated its adsorption selectivity for thorium in wastewater. Adsorption mechanism studies have shown that CAU-PMIDA adsorbs thorium mainly through chemical adsorption，and dynamics follow a pseudo second-order model and reach equilibrium within approximately 30 min. Thorium adsorption on CAU-PMIDA fits the Langmuir isotherm, achieving a maximum capacity of 199.50 mg/g at pH 3.5. Coexisting rare earth ions have minimal interference, demonstrating remarkable Th(IV) selectivity. CAU-PMIDA maintains excellent regeneration performance，high adsorption capacity and selectivity under acidic conditions, which indicating significant potential in the treatment especially from acidic rare earth contaminated wastewater.

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磷化氢功能化铝基金属有机骨架用于稀土污染废水中超快速选择性捕钍

钍是一种放射性核素，通常伴随着稀土矿物。这些矿石在开采和加工过程中产生的废水对环境和公众健康构成重大风险。因此，高效的脱钍吸附剂是目前研究的重点。合成了一种新型二甲基膦功能化铝基金属有机骨架（CAU-PMIDA），并评价了其对废水中钍的吸附选择性。吸附机理研究表明，cac - pmida对钍的吸附主要是化学吸附，动力学遵循伪二阶模型，在30 min左右达到平衡。cu - pmida对钍的吸附符合Langmuir等温线，pH为3.5时最大吸附量为199.50 mg/g。共存的稀土离子干扰最小，表现出显著的Th（IV）选择性。CAU-PMIDA在酸性条件下保持了良好的再生性能、较高的吸附能力和选择性，在处理酸性稀土污染废水方面具有很大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Environmental Technology & Innovation Environmental Science-General Environmental Science

CiteScore

14.00

自引率

4.20%

发文量

435

审稿时长

74 days

期刊介绍： Environmental Technology & Innovation adopts a challenge-oriented approach to solutions by integrating natural sciences to promote a sustainable future. The journal aims to foster the creation and development of innovative products, technologies, and ideas that enhance the environment, with impacts across soil, air, water, and food in rural and urban areas. As a platform for disseminating scientific evidence for environmental protection and sustainable development, the journal emphasizes fundamental science, methodologies, tools, techniques, and policy considerations. It emphasizes the importance of science and technology in environmental benefits, including smarter, cleaner technologies for environmental protection, more efficient resource processing methods, and the evidence supporting their effectiveness.