Novel Microbially Driven Fenton Reaction for In Situ Remediation of Groundwater Contaminated with 1,4-Dioxane, Tetrachloroethylene (PCE) and Trichloroethylene (TCE)

摘要

Background/Objectives. 1,4-Dioxane is an oxygen-containing cyclic ether compound detected in contaminated surface and ground waters in the United States. 1,4-Dioxane has been classified as a probable carcinogen, is highly mobile in water and recalcitrant towards degradation. Current remediation technologies such as carbon absorption, distillation, UV-based advanced oxidation processes are not cost effective. The main objectives of the study were to (1) degrade 1,4-dioxane via a microbially driven Fenton reaction that autocatalytically generates 1,4-dioxane-degrading hydroxyl radicals at circumneutral pH; (2) optimization of the 1,4-dioxane degradation process by varying aerobic and anaerobic exposure times; and (3) identifying the pathway for 1,4-dioxane degradation by monitoring formation of transient intermediate degradation products.