In situ chemical reduction of aquifer sediments is currently being used for chromate and TCE remediation by forming a permeable reactive barrier. The chemical and physical processes that occur during abiotic reduction of natural sediments by sodium dithionite were investigated. In different aquifer sediments, 15 to 25% of FeIII -oxides were dissolved/reduced, which produces primarily adsorbed FeII, and some siderite. The sediment reduction rate (~5h) was the chemically controlled (58 kJ/mole) reduction of a minor phase (
Revised: January 19, 2005 |
Published: July 29, 2004
Citation
Szecsody J.E., J.S. Fruchter, M.D. Williams, V.R. Vermeul, and D.S. Sklarew. 2004.In Situ Chemical Reduction of Aquifer Sediments: Enhancement of Reactive Iron Phases and TCE Dechlorination.Environmental Science & Technology 38, no. 17:4656-4663.PNNL-SA-39253.