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Spent Media Management Pathways for PFAS Treatment Applications.

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PubMed
Summary
This summary is machine-generated.

Managing per- and polyfluoroalkyl substances (PFAS) in water requires effective treatment. Regenerating granular activated carbon (GAC) and anion exchange resin (AER) media can lower costs and energy use compared to single-use options.

Keywords:
anion exchange resin (AER)emerging contaminantsgranular activated carbon (GAC)industrial pretreatmentper‐ and poly‐fluoroalkyl substances (PFAS)spent media

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Area of Science:

  • Environmental Science
  • Water Treatment Technologies
  • Chemical Engineering

Background:

  • Growing regulatory pressure necessitates efficient per- and polyfluoroalkyl substances (PFAS) removal from water across various sectors.
  • Adsorptive media, primarily granular activated carbon (GAC) and anion exchange resin (AER), are increasingly employed for PFAS separation from drinking water.
  • Spent adsorptive media present downstream management challenges, including significant operational costs and regulatory uncertainties.

Purpose of the Study:

  • To evaluate management strategies for PFAS-laden spent media from water treatment.
  • To assess the economic and energy implications of different spent media handling approaches.
  • To explore the potential of regeneration technologies for GAC and AER.

Main Methods:

  • Review of current and emerging technologies for spent media management, including incineration, GAC reactivation, and supercritical water oxidation (SCWO).
  • Analysis of onsite and offsite regeneration processes for both GAC and AER.
  • Comparison of regeneration strategies against single-use media procurement and disposal.

Main Results:

  • Both GAC and AER generate PFAS-laden spent media requiring careful downstream management.
  • Incineration, GAC reactivation, and SCWO are existing or emerging options for spent media disposal.
  • Onsite regeneration of AER and GAC, as well as offsite GAC reactivation, show potential for reducing operational costs and energy consumption.

Conclusions:

  • Regeneration of spent GAC and AER media offers a viable pathway to mitigate the economic and environmental burdens associated with PFAS water treatment.
  • Implementing regeneration processes can lead to substantial reductions in operating costs and energy demands compared to conventional single-use media disposal.
  • Further development and adoption of regeneration technologies are crucial for sustainable PFAS management in water treatment applications.