Rejection of PFAS and priority co-contaminants in semiconductor fabrication wastewater by nanofiltration membranes.

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  • Additional Information
    • Source:
      Publisher: Pergamon Press Country of Publication: England NLM ID: 0105072 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-2448 (Electronic) Linking ISSN: 00431354 NLM ISO Abbreviation: Water Res Subsets: MEDLINE
    • Publication Information:
      Original Publication: Oxford, Pergamon Press.
    • Subject Terms:
      Wastewater*/chemistry ; Filtration* ; Water Pollutants, Chemical* ; Semiconductors* ; Membranes, Artificial* ; Fluorocarbons*/chemistry; Water Purification/methods ; Waste Disposal, Fluid/methods
    • Abstract:
      Use of high-pressure membranes is an effective means for removal of per-and polyfluoroalkyl substances (PFAS) that is less sensitive than adsorption processes to variable water quality and specific PFAS structure. This study evaluated the use of nanofiltration (NF) membranes for the removal of PFAS and industry relevant co-contaminants in semiconductor fabrication (fab) wastewater. Initial experiments using a flat sheet filtration cell determined that the NF90 (tight NF) membrane provided superior performance compared to the NF270 (loose NF) membrane, with NF90 rejection values exceeding 97 % for all PFAS evaluated, including the ultrashort trifluoromethane sulfonic acid (TFMS). Cationic fab co-contaminants diaryliodonium (DIA), triphenylsulfonium (TPS), and tetramethylammonium hydroxide (TMAH) were not as highly rejected as anionic PFAS likely due to electrostatic effects. A spiral wound NF90 module was then used in a pilot system to treat a lab solution containing PFAS and co-contaminants and fab wastewater effluent. Treatment of the fab wastewater, containing high concentrations of perfluorocarboxylic acids (PFCAs), including trifluoroacetic acid (TFA: 96,413 ng/L), perfluoropropanoic acid (PFPrA: 11,796 ng/L), and perfluorobutanoic acid (PFBA: 504 ng/L), resulted in ≥92 % rejection of all PFAS while achieving 90 % water recovery in a semi-batch configuration. These findings demonstrate nanofiltration as a promising technology option for incorporation in treatment trains targeting PFAS removal from wastewater matrices.
      Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
      (Copyright © 2024 Elsevier Ltd. All rights reserved.)
    • Contributed Indexing:
      Keywords: Industrial wastewater; Nanofiltration membranes; PFAS treatment; Rejection mechanisms; Semiconductor manufacturing
    • Accession Number:
      0 (Wastewater)
      0 (Water Pollutants, Chemical)
      0 (Membranes, Artificial)
      0 (Fluorocarbons)
    • Publication Date:
      Date Created: 20240801 Date Completed: 20240816 Latest Revision: 20240816
    • Publication Date:
      20240818
    • Accession Number:
      10.1016/j.watres.2024.122111
    • Accession Number:
      39089122