Li Chenjun, Klemes Max J, Dichtel William R, Helbling Damian E
School of Civil and Environmental Engineering, Cornell University, Ithaca, NY, 14853, USA.
Department of Chemistry, Northwestern University, Evanston, Illinois, 60208, USA.
J Chromatogr A. 2018 Mar 16;1541:52-56. doi: 10.1016/j.chroma.2018.02.012. Epub 2018 Feb 6.
In this study, we evaluated the performance of a novel tetrafluoroterephthalonitrile-crosslinked β-cyclodextrin polymer (TFN-CDP) as a solid-phase extraction (SPE) material for the recovery of up to 189 diverse organic micropollutants (MPs) from water. The optimized extraction procedure requires loading of water samples adjusted to a pH of 3 onto 500 mg of TFN-CDP packed into an SPE cartridge. Under these conditions, 88.7% of the MPs have average extraction efficiencies greater than 80%. The optimized recovery procedure requires elution with 15 mL of methanol amended with 15 mg of calcium chloride. Under these conditions, 58.4% of the MPs have average absolute recoveries between 80% and 120%. We compared the performance of the optimized SPE method for TFN-CDP with a previously optimized SPE method employing hydrophilic-lipophilic balance (HLB) adsorbents in nanopure water and in wastewater-impacted surface water. The data indicate that the optimized TFN-CDP method performs as well as or better than the optimized HLB-based SPE method. These findings represent an important step forward in the development of sustainable and inexpensive materials for the extraction and recovery of organic MPs from water.
在本研究中，我们评估了一种新型四氟对苯二甲腈交联β-环糊精聚合物（TFN-CDP）作为固相萃取（SPE）材料从水中回收多达189种不同有机微污染物（MPs）的性能。优化后的萃取程序要求将pH值调至3的水样加载到填充于SPE小柱中的500 mg TFN-CDP上。在这些条件下，88.7%的MPs平均萃取效率大于80%。优化后的回收程序要求用添加了15 mg氯化钙的15 mL甲醇进行洗脱。在这些条件下，58.4%的MPs平均绝对回收率在80%至120%之间。我们将TFN-CDP优化后的SPE方法与先前在超纯水和受废水影响的地表水中采用亲水亲油平衡（HLB）吸附剂优化后的SPE方法的性能进行了比较。数据表明，优化后的TFN-CDP方法的性能与基于HLB的优化SPE方法相当或更优。这些发现代表了在开发用于从水中萃取和回收有机MPs的可持续且廉价材料方面向前迈出的重要一步。
