Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.
Joint Laboratory on Key Technology of Narcotics Control, China Pharmaceutical University, Nanjing 210009, China.
Molecules. 2020 Mar 13;25(6):1312. doi: 10.3390/molecules25061312.
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., ((ZnCl)()·DMF), where =1,3,5-tris((pyridin-4-ylthio)methyl)benzene), MOF was applied to adsorb and remove tetracycline from sewage and dairy products. The results showed that MOF 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 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 . Additionally, the stability of MOF 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.
抗生素滥用导致的严重环境和人类健康问题引起了全球关注。最近，具有高孔隙率的金属-有机骨架（MOFs）因其在复杂基质中吸附和去除污染物的效果而受到广泛关注。在此，应用一种高稳定性的金属有机骨架（MOF），即((ZnCl)()·DMF)，其中=1,3,5-三((吡啶-4-基硫代)甲基)苯），MOF 用于从污水和乳制品中吸附和去除四环素。结果表明，MOF 在吸附四环素方面表现出很强的性能。研究了初始 pH 值、吸附剂剂量、接触时间和离子强度对 MOF 吸附性能的影响。吸附动力学最符合拟二级模型，吸附等温线很好地符合朗缪尔吸附模型。这表明化学吸附和物理吸附在吸附过程中都起着重要作用，并且四环素的吸附是均匀的，并且在 MOF 的表面上发生单层吸附。此外，还研究了 MOF 的稳定性和吸附机制的细节。因此，这项研究为基于 MOFs 的吸附剂在去除污水和乳制品中的抗生素中的应用提供了一个新的候选物。
