数字农科院2.0

Efficient removal and rapid analysis of mercury ions in water using novel functionalized hydrogen-bonded organic framework materials based on pH adjustment

文献类型： 外文期刊

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

作者机构：

关键词： Sulfhydryl modified hydrogen-bonded organic;framework;Water;Mercury;Adsorption removal;ED-XRF detection

期刊名称： MICROCHEMICAL JOURNAL

ISSN： 0026-265X

年卷期： 2025 年 220 卷

页码：

收录情况： SCIE（2025版）

摘要： Mercury pollution is an increasing public concern in water environment, threatening the ecological quality and human health. In this work, a functionalized hydrogen-bonded organic framework material (HOF-3M) was synthesized and modified for the first time to efficiently remove Hg2+ from environmental water. Characterization results indicate that HOF-3M possesses excellent thermal and structural stability, confirming the successful grafting of sulfhydryl functional groups onto the HOF material. The adsorption mechanism of HOF-3M for Hg2+ is primarily attributed to the synergistic effect of chemical adsorption and electrostatic attraction. After optimization, the theoretical maximum adsorption capacity of HOF-3M was determined to be 306.2 mg/g. After thiol modification, the adsorption capacity increased to six times that of PFC-1. Furthermore, HOF-3M accommodates a wide pH range of 1-10, and exhibits an excellent selectivity (>98 %) for Hg2+ adsorption at pH approximate to 1, while an efficient multi-elemental adsorption of Hg2+, Pb2+, Cu2+, and Al3+ at pH approximate to 6.5. In addition, Hg2+ removal efficiency maintains 94 % after ten consecutive adsorption-desorption cycles, demonstrating favorable reusability. Further, a rapid quantitative detection method for Hg2+ in water can be finished within similar to 2 min by combining HOF-3M preconcentration with a portable energy dispersion X-ray fluorescence spectrometer (ED-XRF), making field deployment analysis of trace Hg in water and even available mercury species in soil extract solution possible. In general, HOF-3M demonstrates green, efficient, reproducible and versatile, and has a promising application for heavy metal pollution remedy and rapid analysis in the future.

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