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CATIONIC POLYMER FOR SELECTIVE REMOVAL OF GENX AND SHORT-CHAIN PFAS FROM SURFACE WATERS AND WASTEWATERS AT NG/L LEVELS
Ateia, M., M. Arifuzzaman, S. Pellizzeri, M.F. Attia, N. Tharayil, J.N.Anker, and T. Karanfil.
Water Research 163:114874(2019)
A poly (N-[3-(dimethylamino)propyl]acrylamide, methyl chloride quaternary) hydrogel matrix (DMAPAA-Q hydrogel matrix) was used as an effective sorbent for sequestering 16 PFAS from surface water and treated wastewater at environmentally relevant concentrations (<1,000 ng/L). Results showed fast removal kinetics with equilibrium time of 60-120 min and a higher removal of sulfonated than carboxylic PFAS, regardless of their chain lengths. No desorption was observed when the experimental time was extended to 24 h. Removal efficiency was not affected under a varying pH range of 4-10. The impact of background anions on PFAS removal by the hydrogel followed an order of SO42->Cl->NO3-. Hydrogel performance was maintained in six consecutive adsorption/regeneration cycles to remove PFAS.
Water Research 163:114874(2019)
A poly (N-[3-(dimethylamino)propyl]acrylamide, methyl chloride quaternary) hydrogel matrix (DMAPAA-Q hydrogel matrix) was used as an effective sorbent for sequestering 16 PFAS from surface water and treated wastewater at environmentally relevant concentrations (<1,000 ng/L). Results showed fast removal kinetics with equilibrium time of 60-120 min and a higher removal of sulfonated than carboxylic PFAS, regardless of their chain lengths. No desorption was observed when the experimental time was extended to 24 h. Removal efficiency was not affected under a varying pH range of 4-10. The impact of background anions on PFAS removal by the hydrogel followed an order of SO42->Cl->NO3-. Hydrogel performance was maintained in six consecutive adsorption/regeneration cycles to remove PFAS.
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