Health & Environmental Research Online (HERO)


Print Feedback Export to File
5024250 
Journal Article 
Reusable Functionalized Hydrogel Sorbents for Removing Long- and Short-Chain Perfluoroalkyl Acids (PFAAs) and GenX from Aqueous Solution 
Huang, PoJ; Hwangbo, M; Chen, Z; Liu, Y; Kameoka, Jun; Chu, K 
2018 
ACS Omega
EISSN: 2470-1343 
American Chemical Society 
12 
17447-17455 
English 
Per- and poly-fluoroalkyl substances (PFASs) are man-made chemicals that are toxic and widely detected in the environment, including drinking water sources. A cost-effective treatment process for PFASs is currently not available. We developed reusable hydrogel sorbents to remove long- and short-chain perfluoroalkyl acids and 2,3,3,3-tetrafluoro-2-(heptafluoropropoxy)propanoic acid (GenX), which is are emerging PFAS. Through fluoridation and amination of poly(ethylene glycol) diacrylate (PEGDA), the newly synthesized sorbents can sorb the five targeted PFASs (perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), perfluorobutanesulfonic acid (PFBS), and perfluorobutanoic acid (PFBA) and GenX) to different degrees from aqueous solution. Aminated PEGDA showed the highest sorption capacity for all five PFASs, particularly for PFBA and PFBS. The bifunctionalized PEGDA showed higher capacities for PFOA and PFOS, suggesting that both hydrophobic interactions and charges contribute to the sorption. Both aminated and bifunctionalized sorbents can remove GenX from water, with the highest sorption capacity of 98.7 μmol g aminated PEGDA-1 within 6 h. The absorbed PFASs on the sorbents were observed and characterized by Fourier-transform infrared spectroscopy. The spent sorbents were reusable after readily regenerated with 70% methanol contained 1% NaCl. 
PFAS
• Additional PFAS (formerly XAgency)
• Expanded PFAS SEM (formerly PFAS 430)
     Perfluorooctane
     Ammonium 4,8-dioxa-3H-perfluorononanoate
• PFAS 150
     Literature Search Update December 2020
          PubMed
     Literature Search August 2019
          PubMed
          Other sources
               Identified after chem tag updates in SWIFT Review
     Screened Studies
          Excluded
               Exclude (TIAB)
     Perfluoro-2-methyl-3-oxahexanoic acid
     Perfluorobutanesulfonyl fluoride
     Perfluorooctanesulfonic acid
     Perfluorooctanoic acid
• PFAS Universe
     Data Source
          Web of Science
          Pubmed
     Ammonium 4,8-dioxa-3H-perfluorononanoate
     Ammonium perfluoro-2-methyl-3-oxahexanoate
     Perfluoro(2-propoxypropanoate)
     Perfluoro-2-methyl-3-oxahexanoic acid
     Perfluorobutanesulfonate
     Perfluorobutanesulfonic acid
     Perfluorobutanoate
     Perfluorobutanoic acid
     Perfluorooctane
     Perfluorooctanesulfonate
     Perfluorooctanesulfonic acid
     Perfluorooctanoate
     2-(Heptafluoropropoxy)propanoic acid
     Perfluorooctanoic acid
• PFBA
     Literature Search Update 5/2019
          WOS
     Scopus: April 2021
• PFBS
     Search
          WOS
     Lit Search Update: May 2019
          WOS
     Scopus: April 2021
OW - HHRAB
• GenX Chemicals (CASRN 13252-13-6 and CASRN 62037-80-3)
     LitSearch - GenX: July 2017 - Feb 2019
          WoS
     LitSearch GenX Ammonium Salt: Feb 2018 - Feb 2019
          WoS
• PFOA (335-67-1) and PFOS (1763-23-1)
     Literature Search Update (2013-2019)
          WOS