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SYNERGISTIC REDUCTIVE DECHLORINATION OF 1,1,1-TRICHLOROETHANE AND TRICHLOROETHENE AND AEROBIC BIODEGRADATION OF 1,4-DIOXANE
Rittman, B.E., Y. Tang, R. Krajmalnik-Brown, Y. Luo, and B. Wang.
SERDP Project ER-2721, 116 pp, 2019

This project proposed and tested a sequential synergistic platform to remediate groundwater co-contaminated with TCE/TCA and 1,4-dioxane. H2-based reactors tests revealed that a hydrogen-based membrane palladium-film reactor (MPfR) using a Pd catalyst anaerobically dechlorinated TCE/TCA more efficiently. A synergistic platform was configured that linked the MPfR with a 1,4-dioxane-oxidizing O2-based membrane biofilm reactor (O2-MBfR) in sequence. Ethane produced from the reduction of TCE and TCA in the MPfR served as the primary electron donor for cometabolic biodegradation of 1,4-dioxane in the O2-MBfR. The system ran without significant accumulation of toxic intermediates. Proposed next steps include advancing the synergistic platform toward commercial application for environmentally relevant contaminant concentrations by a combination of modeling advancements, filling in key knowledge gaps, and pilot-scale testing. https://www.serdp-estcp.org/content/download/49399/471023/file/ER-2721%20Final%20Report.pdf



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