Electrochemical Oxidation of Perfluoroalkyl Acids in Still Bottoms from Regeneration of Ion Exchange Resins

Abstract

Still bottoms are wastes produced from regeneration of saturated ion exchange resin (IXR) by a solution containing high salt content and methanol followed by distillation to remove the methanol. Still bottoms contain high concentrations of per- and polyfluoroalkyl substances (PFASs), and thus their disposal can be a factor limiting the widespread application of IXR technology on PFAS contaminated sites. This study investigated the treatment of perfluoroalkyl acids (PFAAs) in still bottoms during electrochemical oxidation (EO) using Magneli phase titanium suboxide (Ti4O7) as the anode. The results demonstrate the promise of coupling regenerable IXR technology and EO for removing PFAAs from water and destroying them onsite.

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Document Details

Document Type
Technical Report
Publication Date
Mar 02, 2021
Accession Number
AD1154368

Entities

People

  • Dora Chiang
  • Michael Nickelsen
  • Qingguo Huang
  • Rebecca Mora
  • Shangtao Liang
  • Steven Woodard

Organizations

  • University of Georgia

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Advanced Oxidation Processes
  • Alcohols
  • Chemical Engineering
  • Chemical Synthesis
  • Chemistry
  • Ecology
  • Electrospray Ionization
  • Fatty Acids
  • Free Radicals
  • Ion Exchange
  • Ion Exchange Resins
  • Mass Transfer
  • Materials
  • Materials Processing
  • Materials Science
  • Resins
  • Water
  • Water Purification

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Internal Combustion Engine (ICE) Technology.