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Huang, Q., | SERDP Project ER-2717, 70 pp, 2019

The aim of this project was to test whether a reactive electrochemical membrane (REM) system could remove and degrade co-mingled PFAAs and TCE in groundwater. The REM system included an electric-conductive porous Magneli-phase titanium sub-oxide (TSO) ceramic material that served as a 3-D anode and a membrane through which contaminated water was filtered and treated electrochemically. Four TSO electrodes were tested in batch reactors under different conditions to compare electrooxidation (EO) treatment efficiencies and analyze the effects of major operation parameters, water compositions, and co-contaminants. Two electrodes were further tested in a series of REM treatments. The REM enhanced EO efficiency and created a larger reaction anode surface that effectively degraded long-chain PFAAs. Chlorate and perchlorate were formed during REM treatment of a PFAA/TCE co-mingled solution with added chlorine. Researchers envision the use of TSO-based REM technology to treat PFAS in contaminated groundwater in pump-and-treat scenarios. https://www.serdp-estcp.org/content/download/49468/471628/file/ER-2717%20Final%20Report.pdf

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