Efficient Removal of Per- and Polyfluoroalkyl Substances from Water with Zirconium-Based Metal-Organic Frameworks
Efficient Removal of Per- and Polyfluoroalkyl Substances from Water with Zirconium-Based Metal-Organic Frameworks
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DOI：
10.1021/acs.chemmater.1c00324
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发表时间：
2021-04-19
影响因子：
8.6
通讯作者：
Wriedt, Mario
中科院分区：
文献类型：
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作者：
Li, Rui;Alomari, Shefa;Wriedt, Mario
全氟烷基和多氟烷基物质（PFAS）是一类新出现的污染物，由于其毒性、生物累积性和持久性，引起了越来越多的关注。目前用于从污染水中去除PFAS的解决方案依赖于基于吸附的方法，其中常用的吸附剂，例如活性炭和离子交换树脂，表现出低吸附容量和长平衡时间。受这些当前材料的普遍不足的性能的激励，这项工作解决了发现用于高容量和高效PFAS去除的先进吸附剂的需求。研究了锆基金属有机骨架（MOF）NU-1000对水溶液中3种全氟磺酸（PFSAs，C4-C8）和6种全氟羧酸（PFCAs，C1-C9）的吸附性能。结果表明，NU-1000对PFSAs和PFCAs的吸附容量分别为400-620 mg/g和201-604 mg/g，并具有超快吸附动力学，其平衡时间为
Per- and polyfluoroalkyl substances (PFASs) are an emerging class of contaminants raising increased levels of concern due to their toxic, bioaccumulative, and persistent nature. Current solutions for removing PFAS from contaminated water rely on adsorption-based methods where commonly used sorbents, for example, activated carbons and ion-exchange resins, exhibit low adsorption capacity and a long equilibration time. Motivated by the generally deficient performance of these current materials, this work addresses the need for the discovery of advanced sorbents for high capacity and efficient PFAS removal. The zirconium-based metal-organic framework (MOF) NU-1000 was characterized for the adsorption of three perfluorosulfonic acids (PFSAs, C4-C8) and six perfluorinated carboxylic acids (PFCAs, C1-C9) from aqueous solutions. The results indicate that NU-1000 exhibits outstanding adsorption capacities of 400-620 mg/g for PFSAs and 201-604 mg/g for PFCAs coupled with ultrafast adsorption kinetics featuring equilibrium times of