Weaver Labs, 1110 S Innovation Way, #130, Stillwater, OK 74074, USA.
Oklahoma State University, Department of Chemistry, 107 Physical Sciences, Stillwater, OK 74078, USA.
J Hazard Mater. 2023 Apr 15;448:130853. doi: 10.1016/j.jhazmat.2023.130853. Epub 2023 Jan 25.
In this study we synthesized a library of 12 novel adsorbent materials that utilize a chemically well-defined silica support for superior removal of PFAS from real groundwater from a contaminated United States Air Force base. The library of sorbents probed the importance of a fluorous, hydrophobic, and electrostatic components in the removal efficacy. The materials were assessed in batch studies with PFOA, PFOS, and PFBA and compared directly to GAC and Ion Exchange resin. Adsorption kinetics with PFOS were best fit to a pseudo-second order model and equilibrium data fit well to a Langmuir isotherm model. The results were also validated externally, and the best performing material removed greater than 90% of 8 PFAS tested and was able to be regenerated up to 5 cycles. The results provide a top performing material that with further testing can be used to clean up environmentally contaminated water and provide support for the theory that a fluorous component when combined with the electrostatic and hydrophobic components, imparts both enhanced PFAS selectivity and functional resilience to the material.
在这项研究中，我们合成了一系列 12 种新型吸附材料，这些材料利用化学定义明确的二氧化硅载体，从受污染的美国空军基地的实际地下水中优越地去除 PFAS。该吸附剂库探究了氟烃、疏水性和静电成分在去除效果中的重要性。这些材料在批次研究中与 PFOA、PFOS 和 PFBA 进行了评估，并与 GAC 和离子交换树脂直接进行了比较。PFOS 的吸附动力学最符合拟二级模型，平衡数据很好地符合 Langmuir 等温线模型。结果也进行了外部验证，表现最好的材料去除了 8 种测试的 PFAS 中的 90%以上，并且可以再生 5 个循环。结果提供了一种表现最好的材料，如果进一步测试，可以用于清理受环境污染的水，并为以下理论提供支持：当氟烃成分与静电和疏水性成分结合时，会赋予材料增强的 PFAS 选择性和功能弹性。
