数字农科院2.0

Functionalized magnetic hydrogen-bonded organic framework for preconcentration and rapid detection of lead and copper ions in water

文献类型: 外文期刊

作者: Lin Chen;Guanyu Lan;Yan Xu;Xue Li;Xuefei Mao

作者机构:

关键词: Copper;Lead;Magnetic hydrogen-bonded organic framework;Preconcentration;Rapid detection;X-ray fluorescence spectrometry

期刊名称: Microchemical Journal

ISSN: 0026-265X

年卷期: 2025 年 209 卷

页码:

收录情况: SCIE(2025版)

摘要: Hydrogen-bonded organic framework (HOF) is a novel and ideal material for preconcentration of heavy metal in water by hydrogen bonding considering simple synthesis and low cost. In this work, magnetic HOF material (Fe3O4@HOF) was designed and synthesized under simple and mild conditions for preconcentration and detection of lead (Pb) and copper (Cu) in water. This Fe3O4@HOF exhibits maximum adsorption capacities for 579.81 mg/g Pb2+ and 146.48 mg/g Cu2+, respectively, with an excellent selectivity (>95 % adsorption) for Pb2+ and Cu2+ in presence of other ions; as well, shows a favorable recycling performance (>95 % adsorption) after 10 adsorption–desorption cycles based on external magnetic adsorption. The mechanism results proved that the adsorption of Pb2+ and Cu2+ might be attributed to chemisorption, electrostatic interactions and ion exchange. Based on the glass fiber membrane filtration, Fe3O4@HOF can be utilized as enrichment material coupled with X-ray fluorescence spectrometer (XRF) for detection of Pb2+ and Cu2+ in water; the limits of detection (LODs) for Pb2+ and Cu2+ were 1.5 μg/L and 1.3 μg/L (from 100 mL water to 5 mg Fe3O4@HOF), respectively. This work presents a green, economical and eco-friendly novel material that can be easily prepared, separated and reused, demonstrating a promising potential for efficient preconcentration and sensitive detection of heavy metals in water.

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