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6356904 
Journal Article 
Removal of eight perfluoroalkyl acids from aqueous solutions by aeration and duckweed 
Zhang, W; Liang, Y 
2020 
Science of the Total Environment
ISSN: 0048-9697
EISSN: 1879-1026 
Elsevier 
0048-9697 
724 
Elsevier 
138357 
English 
Poly- and perfluoroalkyl substances (PFAS) are surfactants. Leveraging their surface active feature, this work investigated using aeration to remove perfluoroalkyl acids (PFAAs) from aqueous solutions. Eight PFAAs were spiked to either deionized water or Hoagland solution at three pHs. After 7 h of aeration, removals of perfluorobutanoic acid (PFBA), perfluoropentanoic acid (PFPeA), perfluorobutanesulfonic acid (PFBS), and perfluorohexanoic acid (PFHxA) were marginal and much lower than those of and perfluoroheptanoic acid (PFHpA), perfluorohexanesulfonic acid (PFHxS), perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS). In deionized water, close to 80% of PFOA and PFOS at 200 ppb were removed when the pH was 2.3. The Hoagland solution at pH 2.3 and 5.0 benefited removal of long-chain PFAS at 2 ppb, but not at 200 ppb. With duckweed growing on the Hoagland solution surface, >95% of PFHpA, PFHxS, PFOA, and PFOS at 200 ppb were removed after 2 weeks. Aeration enhanced duckweed uptake of PFHxS, PFOA, and PFOS at 2 ppb significantly. Specific to PFOS, duckweed accumulated 14.4% of this compound initially spiked at 2 ppb in 2 weeks. These results demonstrated that aeration plus duckweed could be a viable and scalable remediation solution for surface water contaminated by PFAS. 
Plant Science; Aeration; Duckweed; Poly- and perfluoroalkyl substances (PFAS); Removal efficiency; BIOTECHNOLOGY:Biotechnology and Bioengineering; 92.9.1.5:PLANT SCIENCE; Undefined:CABSCLASS 
PFAS
• Expanded PFAS SEM (formerly PFAS 430)
     Perfluorooctane
• PFAS 150
     Literature Search Update December 2021
          PubMed
     Missing 2021 searches
     Literature Search Update December 2020
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     Literature Search August 2019
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     Not prioritized for screening
     Perfluorobutanesulfonyl fluoride
     Perfluorohexanesulfonic acid
     Perfluorohexanoic acid
     Perfluoropentanoic acid
• PFAS Universe
     Data Source
          Web of Science
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     Perfluorobutanesulfonate
     Perfluorobutanesulfonic acid
     Perfluorobutanoate
     Perfluorobutanoic acid
     Perfluoroheptanoate
     Perfluoroheptanoic acid
     Perfluorohexadecanoic acid
     Perfluorohexanesulfonate
     Perfluorohexanesulfonic acid
     Perfluorohexanoate
     Perfluorohexanoic acid
     Perfluorooctane
     Perfluorooctanesulfonate
     Perfluorooctanesulfonic acid
     Perfluorooctanoate
     Perfluoropentanoate
     Perfluoropentanoic acid
     Sodium perfluorohexanesulfonate
     Perfluorooctanoic acid
• PFBA
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• PFBS
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• PFHxA
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     HAWC
• PFHxS
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          WOS
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     Supplemental
          TiAb
          Manufacture, engineering, use, treatment, remediation, or laboratory methods
OW - HHRAB
• PFOA (335-67-1) and PFOS (1763-23-1)
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