Sheehan Nathaniel P, Ponge Charles A, Pankratz Abe, Hutchison Justin M, Laird Brian B, Nguyen Nuong P, Shiflett Mark B, Timalsina Deepak, Wang Michael Zhuo, Peltier Edward F
Civil, Environmental, and Architectural Engineering, University of Kansas, Lawrence, KS 66045, USA.
Chemical and Petroleum Engineering, University of Kansas, Lawrence, KS 66045, USA; Wonderful Institute for Sustainable Engineering, University of Kansas, Lawrence, KS 66045, USA.
Chemosphere. 2025 Jun;378:144414. doi: 10.1016/j.chemosphere.2025.144414. Epub 2025 Apr 15.
Per- and polyfluoroalkyl substances (PFAS) are emerging anthropogenic pollutants of concern and are associated with potential human and environmental health concerns. PFAS removal can be achieved using adsorbents such as activated carbon and ion exchange resins. Recently, zeolites have been identified as another potential adsorption technology with increased selectivity and product regenerability that is not currently achieved with other adsorbents. Zeolite CP814E∗ (BEA) was tested in batch reactions for PFAS removal in different water matrix characteristics, including pH, select cations, humic acids (HA), fulvic acids (FA), and natural organic matter (NOM). In synthetic EPA waters, BEA performance increased compared to ultrapure water testing. BEA performance also significantly increased in the presence of Na, Ca, and Mg ions compared to ultrapure waters. PFOA and PFOS sorption did not vary significantly in the 6-9 pH range. HA, FA, and NOM did not significantly impact the sorption of PFOA and PFOS on the BEA at 1 g/L zeolite loading. One organic interferent, Suwannee River humic acids, did reduce PFOA sorption when the ratio of adsorbent to liquid was reduced to 0.1 mg/L. BEA retained sorption capacity over seven thermal regeneration cycles, and a BEA test with a real water demonstrated PFOA, PFOS and PFHxS adsorption at the parts per trillion level.
全氟和多氟烷基物质（PFAS）是新出现的令人关注的人为污染物，与潜在的人类和环境健康问题相关。可以使用活性炭和离子交换树脂等吸附剂来去除PFAS。最近，沸石已被确定为另一种潜在的吸附技术，具有更高的选择性和产品可再生性，这是目前其他吸附剂所无法实现的。对沸石CP814E∗（BEA）进行了批量反应测试，以研究其在不同水基质特性（包括pH值、特定阳离子、腐殖酸（HA）、富里酸（FA）和天然有机物（NOM））下对PFAS的去除效果。在合成的美国环境保护局（EPA）水中，与超纯水测试相比，BEA的性能有所提高。与超纯水相比，在存在Na、Ca和Mg离子的情况下，BEA的性能也显著提高。在6 - 9的pH范围内，全氟辛酸（PFOA）和全氟辛烷磺酸（PFOS）的吸附没有显著变化。在沸石负载量为1 g/L时，HA、FA和NOM对PFOA和PFOS在BEA上的吸附没有显著影响。当吸附剂与液体的比例降至0.1 mg/L时，一种有机干扰物——苏万尼河腐殖酸确实降低了PFOA的吸附。BEA在七个热再生循环中保持了吸附能力，并且在实际水样测试中，BEA对PFOA、PFOS和全氟己烷磺酸（PFHxS）的吸附达到了万亿分之一的水平。
