Use of strong anion exchange resins for the removal of perfluoroalkylated substances from contaminated drinking water in batch and continuous pilot plants

Water Research
Alessandro ZaggiaAndrea Chiorboli

Abstract

In recent years abnormally high levels of perfluoroalkylated substances (PFAS) have been detected both in surface and underground water sampled in an area covering approximately 150 square kilometers in the Veneto region (Italy) indicating the presence of a pollution point source (fluorochemicals production plant). Adsorption on granular activated carbon is an emergency measure which is poorly effective requiring frequent replacement. This work focuses on the application of three strong anion exchange resins (Purolite® A520E, A600E and A532E) for the removal of traces of PFOA, PFOS, PFBA and PFBS (concentration of hundreds of ng L(-1)) from drinking water. This technology is attractive for the possibility of reusing resins after an in-situ regeneration step. A strong relationship between the hydrophobicity of the exchange functional group of the resin and its capacity in removing PFAS exists. A600E (non hydrophobic) and A520E (fairly hydrophobic) show a reduced sorption capacity compared to A532E (highly hydrophobic). While A600E and A520E can be regenerated with solvent-less dilute solutions of non-toxic NH4Cl and NH4OH, A532E requires concentrated solutions of methanol or ethanol and 1% NH4Cl and for the sake of this work it ...Continue Reading

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Citations

Oct 19, 2019·Environmental Technology·Dongqing ZhangYanna Liang
Jun 1, 2019·Critical Reviews in Environmental Science and Technology·Brian C CroneJonathan G Pressman
Oct 20, 2020·The Science of the Total Environment·Melanie KahRai Kookana
Feb 10, 2021·Environmental Science & Technology·Shilai HaoTimothy J Strathmann
Nov 7, 2020·International Journal of Environmental Research and Public Health·Jay N MeegodaRichard W Marsh
Feb 15, 2021·Chemosphere·Fuhar DixitMadjid Mohseni
Apr 6, 2021·Journal of Environmental Management·Dinusha P SiriwardenaNathan Burkitt
Jun 15, 2020·Journal of Contaminant Hydrology·Jennifer L GuelfoChristopher P Higgins
Nov 2, 2017·Environmental Science & Technology·Xiaolin ZhangBingcai Pan
Apr 29, 2020·ACS Central Science·Rafael Verduzco, Michael S Wong
Apr 29, 2020·ACS Central Science·Elango KumarasamyFrank A Leibfarth
Aug 25, 2021·The Science of the Total Environment·Sanny VermaMallikarjuna N Nadagouda

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