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Influence of dissolved organic matter concentration and composition on the removal efficiency of perfluoroalkyl substances (PFASs) during drinking water treatment
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Limnology. Swedish Univ Agr Sci, Dept Aquat Sci & Assessment, Box 7050, S-70507 Uppsala, Sweden.ORCID iD: 0000-0002-6106-6893
Swedish Univ Agr Sci, Dept Aquat Sci & Assessment, Box 7050, S-70507 Uppsala, Sweden..
Sandviken Municipal, Sandviken, Sweden..
Swedish Univ Agr Sci, Dept Aquat Sci & Assessment, Box 7050, S-70507 Uppsala, Sweden..
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2017 (English)In: Water Research, ISSN 0043-1354, E-ISSN 1879-2448, Vol. 121, p. 320-328Article in journal (Refereed) Published
Abstract [en]

Drinking water treatment plants (DWTPs) are constantly adapting to a host of emerging threats including the removal of micro-pollutants like perfluoroalkyl substances (PFASs), while concurrently considering how background levels of dissolved organic matter (DOM) influences their removal efficiency. Two adsorbents, namely anion exchange (AE) and granulated active carbon (GAC) have shown particular promise for PFAS removal, yet the influence of background levels of DOM remains poorly explored. Here we considered how the removal efficiency of 13 PFASs are influenced by two contrasting types of DOM at four concentrations, using both AE (Purolite A-600 (R)) and GAC (Filtrasorb 400 (R)). We placed emphasis on the pre-equilibrium conditions to gain better mechanistic insight into the dynamics between DOM, PFASs and adsorbents. We found AE to be very effective at removing both PFASs and DOM, while largely remaining resistant to even high levels of background DOM (8 mg carbon L-1) and surprisingly found that smaller PFASs were removed slightly more efficiently than longer chained counterparts, In contrast, PFAS removal efficiency with GAC was highly variable with PFAS chain length, often improving in the presence of DOM, but with variable response based on the type of DOM and PFAS chain length.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2017. Vol. 121, p. 320-328
Keywords [en]
Drinking water, Perfluoroalkyl substances (PFASs), Anion exchange, Granulated active carbon, Dissolved organic matter, Drinking water treatment
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-328953DOI: 10.1016/j.watres.2017.05.047ISI: 000403432100032PubMedID: 28570871OAI: oai:DiVA.org:uu-328953DiVA, id: diva2:1140869
Funder
Swedish Research CouncilAvailable from: 2017-09-13 Created: 2017-09-13 Last updated: 2017-09-13Bibliographically approved

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