铜掺杂 ZIF-8 高效去除水中氧氟沙星。
Highly Effective Removal of Ofloxacin from Water with Copper-Doped ZIF-8.
机构信息
College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
出版信息
Molecules. 2022 Jul 5;27(13):4312. doi: 10.3390/molecules27134312.
Residual antibiotics in wastewater have gained widespread attention because of their toxicity to humans and the environment. In this work, Cu-doped ZIF-8s (Cu-ZIF-8s) were successfully synthesized by the impregnation of Cu in ZIF-8 and applied in the removal of ofloxacin (OFX) from water. Remarkably, excellent adsorption performance was obtained in Cu-ZIF-8s, especially for Cu-ZIF-8-1, in which the adsorption capacity (599.96 mg·g) was 4.2 times higher than that of ZIF-8 and superior to various adsorbents reported previously. The adsorption kinetics and adsorption isotherm follow the pseudo-second-order model and the Langmuir model, respectively. Furthermore, the removal efficiencies of OFX in Cu-ZIF-8-1 reached over 90% at low concentrations. It was revealed that electrostatic interaction and complexation play important roles in the adsorption process. In addition, the material can be regenerated by simple methods. Therefore, the obtained Cu-doped MOFs may have a promising application in the treatment of antibiotic-containing wastewater.
废水中残留的抗生素因其对人类和环境的毒性而受到广泛关注。在这项工作中，通过在 ZIF-8 中浸渍 Cu 成功合成了 Cu 掺杂的 ZIF-8（Cu-ZIF-8），并将其应用于水中氧氟沙星（OFX）的去除。引人注目的是，Cu-ZIF-8s 表现出了优异的吸附性能，特别是 Cu-ZIF-8-1，其吸附容量（599.96mg·g）是 ZIF-8 的 4.2 倍，优于以前报道的各种吸附剂。吸附动力学和吸附等温线分别遵循准二级模型和朗缪尔模型。此外，Cu-ZIF-8-1 对低浓度 OFX 的去除效率超过 90%。结果表明，静电相互作用和配位作用在吸附过程中起着重要作用。此外，该材料可以通过简单的方法进行再生。因此，所获得的掺杂 MOFs 可能在处理含抗生素废水方面具有广阔的应用前景。
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