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6CCVD Research

Combining electrochemistry and ultraviolet radiation for the degradation of per- and poly-fluoroalkyl substances in contaminated groundwater and wastewater

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2023-07-12
JournalJournal of Water Process Engineering
AuthorsJean NoĆ«l Uwayezu, Ivan Carabante, Patrick Van Hees, Patrik Karlsson, JÅ«ratė Kumpienė
InstitutionsEurostep (Sweden), LuleƄ University of Technology
Citations20

Abstract

Section titled ā€œAbstractā€

Electrochemical and ultraviolet-based methods are advanced oxidation processes emerging as viable water and wastewater treatment options. In this study, a combination of these two methods (EO-UV) using boron-doped diamond (BDD) electrodes and ultraviolet radiation at both 185 and 254 nm was assessed for the degradation of poly-fluoroalkyl substances (PFAS). Sodium persulfate (Na2S2O8) and sodium sulfate (Na2SO4) were used as electrolytes. The method was investigated on model solutions containing perfluorooctanoic acid (PFOA) and perfluorosulfonic acid (PFOS). The method's effectiveness was assessed by comparing PFAS removal efficiencies and energy demands associated with the use of separate and combined treatments. The results showed that the highest removal of PFOA and PFOS was 96 % and 85 % respectively, which was achieved using EO-UV and persulfate electrolytes. Average removal efficiencies were 1.5-2 times higher in EO-UV than in EO and 4-6 times higher than in UV treatment. The degradation of PFAS under EO-UV and persulfate applied to PFAS-contaminated groundwater and wastewater reached 94 % PFOA and 88 % PFOS in groundwater and 51 % and 63 % in wastewater. The removal of the sum of eleven PFAS was 86 % and 66 % in groundwater and wastewater, respectively. The combination of EO, UV and persulfate was the most effective option for PFAS treatment at lower energy consumption.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
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  2. 2020 - The high persistence of PFAS is sufficient for their management as a chemical class
  3. 2019 - PFAS health effects database: protocol for a systematic evidence map [Crossref]
  4. 2021 - Paper product production identified as the main source of per- and polyfluoroalkyl substances (PFAS) in a Norwegian lake: source and historic emission tracking [Crossref]
  5. 2018 - Occurrence of perfluoroalkyl substances (PFAS) in garden produce at homes with a history of PFAS-contaminated drinking water [Crossref]
  6. 2017 - Concentrations and patterns of perfluoroalkyl and polyfluoroalkyl substances in a river and three drinking water treatment plants near and far from a major production source [Crossref]
  7. 2017 - Novel treatment technologies for PFAS compounds: a critical review [Crossref]
  8. 2020 - A review of the emerging treatment technologies for PFAS contaminated soils [Crossref]
  9. 2017 - Ion exchange resin for PFAS removal and pilot test comparison to GAC [Crossref]
  10. 2022 - Emerging technologies for PFOS/PFOA degradation and removal: a review [Crossref]

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