Gluconic-Acid-Functionalized Micropores in a Metal-Organic framework for selective separation of gallium ions

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering Pub Date : 2025-09-02 DOI:10.1016/j.mineng.2025.109721

Kai Jia , Ziyang Zeng , Mengyuan Wu , Congcong Han , Yichuan Zhai , Guosheng Li , Jinhui Liu , Yijun Cao , Chongqing Wang

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Abstract

The adsorption and recovery of gallium (Ga) ions from aqueous solutions are crucial for the sustainable utilization of this valuable and strategic metal resource. In this study, a novel metal–organic framework (MOF) adsorbent, MOF-808-GA, was successfully synthesized through postsynthetic modification with gluconic acid (GA). Characterization techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) analysis, confirmed the successful incorporation of GA molecules into the MOF-808 framework while maintaining its structural integrity. The adsorption performance of MOF-808-GA was evaluated in various solutions containing Ga³⁺ ions at different concentrations, along with competing ions such as aluminum (Al³⁺) and zinc (Zn²⁺), which are commonly encountered in resource recovery. MOF-808-GA exhibited exceptional selectivity and adsorption capacity for Ga ions, with a maximum adsorption capacity of 174.46 mg/g. The adsorption behavior was characterized by using various isotherm adsorption lines and adsorption kinetic equations across a wide range of Ga-ion concentrations. XPS and FTIR confirmed that free hydroxyl sites play a role in enhancing Ga adsorption. MOF-808-GA exhibited excellent stability and reusability, making it a promising candidate for practical applications involving resource recovery and recycling.

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金属有机骨架中葡萄糖酸功能化微孔对镓离子的选择性分离

从水溶液中吸附和回收镓离子是可持续利用这一宝贵的战略性金属资源的关键。本研究通过葡萄糖酸（GA）的合成修饰，成功合成了一种新型金属有机骨架（MOF）吸附剂MOF-808-GA。表征技术，包括x射线衍射（XRD）、扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）、x射线光电子能谱（XPS）和Brunauer-Emmett-Teller （BET）分析，证实了GA分子成功地结合到MOF-808框架中，同时保持其结构完整性。考察了MOF-808-GA在不同浓度的Ga3+溶液中的吸附性能，以及资源回收中常见的铝（Al3+）和锌（Zn2+）等竞争离子的吸附性能。MOF-808-GA对Ga离子表现出优异的选择性和吸附能力，最大吸附量为174.46 mg/g。利用各种等温吸附线和吸附动力学方程对其吸附行为进行了表征。XPS和FTIR证实，游离羟基位点对Ga的吸附有促进作用。MOF-808-GA具有优异的稳定性和可重复使用性，是一种很有前景的资源回收和循环利用的实际应用材料。

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来源期刊

Minerals Engineering 工程技术-工程：化工

CiteScore

8.70

自引率

18.80%

发文量

519

审稿时长

81 days

期刊介绍： The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.