The overall goal of this project is to assess the impact powdered activated carbon (PAC)-based particulate amendments have on the fate and transport of trichloroethene (TCE) in the presence of per- and polyfluoroalkyl substances (PFAS). The specific objectives of this project are as follows:
For the remedial strategy, PAC-based particulate amendments would be injected and mixed with the groundwater plume to decrease both aqueous phase concentrations of chlorinated ethenes and PFAS to levels below the toxicity limit necessary for complete reductive dechlorination to occur. To ensure optimal distribution of particulate amendment, in situ mixing would be done with single-point groundwater recirculation wells downgradient of the source area. Plumes treated in that manner would not only have lower concentrations but also cause high retardation of higher concentrations coming from upstream from the source area.
This project involves the following tasks:
This project will provide the Department of Defense with the information necessary to determine whether PAC-based particulate amendments work as intended in readily sequestering PFAS and chlorinated ethenes, promote biodegradation, determining the optimal method for subsurface distribution, and how this technology performs in situ over the long-term. (Anticipated Project Completion - 2025)