Per- and polyfluoroalkyl substances (PFAS) are ubiquitous in many consumer products and present serious environmental challenges due to their persistent nature. Currently, conventional water treatment methods fail to remove PFAS, and other newly proposed materials/techniques face challenges when employed under realistic conditions. This study reports on poly(ethylenimine)-functionalized cellulose microcrystals (PEI-f-CMC) that showed a near-instant and high removal of PFAS under concentrations relevant to their actual occurrence in the natural environment (i.e., <1000 ng/L). The selective removal efficiency of 22 PFAS from different classes (i.e., legacy carboxylic and sulfonated PFAS, emerging carboxylic and sulfonated PFAS, and PFAS-precursors) using PEI-f-CMC was confirmed in lake water as well as solutions codosed with two additional types of natural organic matter. The performance of PEI-f-CMC was maintained in eight consecutive adsorption/regeneration cycles to remove PFAS. The PEI-f-CMC with its unique fast kinetics and high adsorption activity toward PFAS exhibits a great potential for being a promising alternative adsorbent for PFAS control.

中文翻译：

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在环境相关的条件下，由聚乙烯亚胺官能化的纤维素微晶快速去除聚和全氟化的烷基物质

全氟烷基物质和多氟烷基物质（PFAS）在许多消费产品中无处不在，并且由于其持久性而面临严重的环境挑战。当前，常规的水处理方法不能去除PFAS，并且在现实条件下使用时，其他新提出的材料/技术也面临挑战。这项研究报道了聚（乙烯亚胺）-官能化的纤维素微晶（PEI- f -CMC），在与自然环境中实际发生的浓度（即<1000 ng / L）相关的浓度下，PFAS几乎可以立即被大量去除。 。使用PEI- f从不同类别（即，传统的羧酸和磺化PFAS，新兴的羧酸和磺化PFAS和PFAS前体）中选择性去除22种PFAS-CMC在湖水中以及与两种其他类型的天然有机物质共存的溶液中得到确认。PEI- f -CMC的性能在八个连续的吸附/再生循环中得以维持，以去除PFAS。的PEI- ˚F -CMC朝向PFAS其独特的快速动力学和高吸附活性表现出对是用于PFAS控制有前途的替代吸附剂的巨大潜力。