期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 139, 期 23, 页码 7689-7692出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b02381
关键词
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资金
- NSF through the Center for Sustainable Polymers [CHE-1413862]
- NSF MRSEC program [DMR-1120296]
- IMSERC at Northwestern University
- Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource [NSF NNCI-1542205]
- NSF [DMR-1157490]
- State of Florida
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1413862] Funding Source: National Science Foundation
Per- and poly fluorinated alkyl substances (PFASs), notably perfluorooctanoic acid (PFOA), contaminate many ground and surface waters and are environmentally persistent. The performance limitations of existing remediation methods motivate efforts to develop effective adsorbents. Here we report a beta-cyclodextrin (beta-CD)-based polymer network with higher affinity for PFOA compared to powdered activated carbon, along with comparable capacity and kinetics. The beta-CD polymer reduces PFOA concentrations from 1 mu g L-1 to <10 ng L-1, at least 7 times lower than the 2016 U.S. EPA advisory level (70 ng L-1), and was regenerated and reused multiple times by washing with MeOH. The performance of the polymer is unaffected by humic acid, a component of natural organic matter that fouls activated carbons. These results are promising for treating PFOA-contaminated water and demonstrate the versatility of beta-CD-based adsorbents.
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