Removal of Tetracycline in Sewage and Dairy Products with High-Stable MOF
Removal of Tetracycline in Sewage and Dairy Products with High-Stable MOF
复制标题
高稳定 MOF 去除污水和乳制品中的四环素
DOI：
10.3390/molecules25061312
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发表时间：
2020-03-02
期刊：
影响因子：
4.6
通讯作者：
Di, Bin
中科院分区：
文献类型：
--
作者：
Li, Kan;Li, Jing-jing;Di, Bin
滥用抗生素造成的严重环境和人类健康问题已引起全世界的关注。近年来，具有高孔隙率的金属有机骨架（MOFs）在复杂基质中对污染物的吸附和去除效果引起了广泛的关注。本文采用高稳定金属有机骨架（MOF），即((ZnCl2)(3)(L)(2)。采用DMF （n)，其中L=1,3,5-三（（吡啶-4-基硫代）甲基）苯），MOF 1吸附和去除污水和乳制品中的四环素。结果表明，MOF 1对四环素具有较强的吸附性能。考察了初始pH值、吸附剂剂量、接触时间和离子强度对MOF - 1吸附性能的影响。吸附动力学符合拟二级吸附模型，吸附等温线符合Langmuir吸附模型。结果表明，化学吸附和物理吸附在吸附过程中都起着重要的作用，对四环素的吸附是均匀的，并且发生在MOF 1表面的单层上。此外，还对MOF - 1的稳定性和吸附机理进行了详细的研究。因此，本研究为mofs基吸附剂在污水和乳制品中抗生素的去除提供了新的候选材料。
Serious environmental and human health problems caused by the abuse of antibiotics have attracted worldwide concern. Recently, metal-organic frameworks (MOFs) with high porosity have drawn wide attention for their effects in the adsorption and removal of pollutants from complex matrices. Herein, a high-stable metal organic framework (MOF), i.e., ((ZnCl2)(3)(L)(2).DMF)(n), where L=1,3,5-tris((pyridin-4-ylthio)methyl)benzene), MOF 1, was applied to adsorb and remove tetracycline from sewage and dairy products. The results showed that MOF 1 exhibited a strong performance in the adsorption of tetracycline. The effects of initial pH values, adsorbent dose, contact time and ionic strength of the adsorption performance of MOF 1 were investigated. The adsorption kinetics best fit the pseudo-second order model, and the adsorption isotherms matched the Langmuir adsorption model well. It was indicated that both chemical adsorption and physical adsorption play an important role in the adsorption process, and the adsorption of tetracycline was homogeneous and occurred on a monolayer on the surface of MOF 1. Additionally, the stability of MOF 1 and the details of the adsorption mechanism were also investigated. Thus, this study provides a new candidate for the application of MOFs-based adsorbents in the removal of antibiotics from sewage and dairy products.