Efficient adsorptive separation of Pb(Ⅱ) via Zn-triazole metal-organic framework

IF 4.7 3区材料科学 Q1 CHEMISTRY, APPLIED

Microporous and Mesoporous Materials Pub Date : 2025-07-24 DOI:10.1016/j.micromeso.2025.113780

Zongwu Wei , Sefeng Qin , Jiayi Wang , Chuncan Yang , Huafa Liang , Kungang Chai , Zhiqiang Lin , Fang Shen

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Abstract

With the intensification of the heavy metal pollution burden, it is urgent to develop an adsorbent that can efficiently and selectively separate and capture heavy metal ions. In this work, a Zn-based triazole MOF was successfully prepared for efficient selective adsorption of Pb(II) (MOF-ZTN). The maximum uptake capacity of MOF-ZTN for Pb(II) can peak at 790 mg g⁻¹, with selectivity coefficients (K_s) for Mg(II), Cd(II), Mn(II), and Co(II) being 2927, 1846, 4453, and 828, respectively, indicating that the material has a significant selective adsorption advantage for Pb(II). In the low concentration Pb(II) wastewater system, MOF-ZTN can also effectively remove more than 90 % of Pb(II) ions so that the treated wastewater quality can meet the requirements of relevant emission standards. Five consecutive adsorption-desorption cycles confirm the recyclability of MOF-ZTN. The theoretical calculation elucidates that the synergistic capture of Pb(II) by the nitrogen atoms of three triazoles in MOF-ZTN is the key to its adsorption mechanism. In short, this study shows that MOF-ZTN exhibits significant potential in the efficient capture and separation of Pb(II) and provides a new theoretical basis for the application of MOFs within the domain of environmental protection.

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zn -三唑金属-有机骨架吸附分离Pb（Ⅱ）

随着重金属污染负担的加剧，迫切需要开发一种高效、选择性地分离和捕获重金属离子的吸附剂。本文成功制备了锌基三唑MOF，用于高效选择性吸附Pb(II) （MOF- ztn）。MOF-ZTN对Pb（II）的最大吸附量可达790 mg g−1，对mg （II）、Cd（II）、Mn（II）和Co（II）的选择性系数（Ks）分别为2927、1846、4453和828，表明该材料对Pb（II）具有显著的选择性吸附优势。在低浓度Pb（II）废水处理系统中，MOF-ZTN还能有效去除90%以上的Pb（II）离子，使处理后的废水水质达到相关排放标准要求。连续5次吸附-解吸循环验证了MOF-ZTN的可回收性。理论计算表明，MOF-ZTN中三个三唑的氮原子对Pb（II）的协同吸附是其吸附机理的关键。总之，本研究表明MOF-ZTN在高效捕获和分离Pb（II）方面具有显著的潜力，为mof在环境保护领域的应用提供了新的理论依据。

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

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.