Department of Chemistry, University of North Carolina at Chapel Hill, 131 South Rd, Chapel Hill, NC 27599, USA.
Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, 135 Dauer Dr, Chapel Hill, NC 27599, USA.
Angew Chem Int Ed Engl. 2022 Oct 10;61(41):e202208150. doi: 10.1002/anie.202208150. Epub 2022 Sep 2.
PFAS are known bioaccumulative and persistent chemicals which pollute natural waters globally. There exists a lack of granular sorbents to efficiently remove both legacy and emerging PFAS at environmentally relevant concentrations. Herein, we report a class of polymer networks with a synergistic combination of ionic and fluorous components that serve as granular materials for the removal of anionic PFAS from water. A library of Ionic Fluorogels (IFs) with systematic variation in charge density and polymer network architecture was synthesized from hydrolytically stable fluorous building blocks. The IFs were demonstrated as effective sorbents for the removal of 21 legacy and emerging PFAS from a natural water and were regenerable over multiple cycles of reuse. Comparison of one IF to a commercial ion exchange resin in mini-rapid small-scale column tests demonstrated superior performance for the removal of short-chain PFAS from natural water under operationally relevant conditions.
全氟烷基物质(PFAS)是一种已知的具有生物蓄积性和持久性的化学物质,会对全球的自然水域造成污染。目前缺乏能够在环境相关浓度下有效去除传统和新兴 PFAS 的颗粒状吸附剂。在此,我们报告了一类具有离子和氟相协同组合的聚合物网络,它们可用作从水中去除阴离子 PFAS 的颗粒状材料。从水解稳定的氟相构建块合成了具有系统电荷密度和聚合物网络结构变化的离子氟凝胶(IF)库。IF 被证明是从天然水中去除 21 种传统和新兴 PFAS 的有效吸附剂,并且可以在多次重复使用循环中再生。在微型快速小型柱试验中,将一种 IF 与商业离子交换树脂进行比较,结果表明在操作相关条件下,该 IF 从天然水中去除短链 PFAS 的性能更优。