In-situ Substrate Addition to Create Reactive Zones for Treatment of Chlorinated Aliphatic Hydrocarbons: Hanscom Air Force Base

摘要

The general purpose of this demonstration program was to evaluate the efficacy of the In-Situ Reactive Zone (IRZ)/Enhanced Reductive Dechlorination (ERD) technology to remove chlorinated aliphatic compounds (CAHs) from impacted groundwater in a range of geologic conditions and CAH concentrations. The demonstration also helped determine the rates of mass removal of CAHs in groundwater at the demonstration site at Hanscom Air Force Base. Ultimately, the objectives of the demonstration were to demonstrate the ability to remediate contaminants in the subsurface over a relatively short time period (from one to five years in typical full-scale applications) and to gather information that can be used to estimate long term treatment effectiveness, life span and costs. The results of the demonstration were used to develop a protocol for the use of ERD technology for CAHs at DoD facilities (Suthersan, 2002). Also important in this demonstration was to show that the degradation of CAHs does not deadend at undesirable by-products such as cis-1,2- dichloroethene (cis-1,2-DCE) and/or vinyl chloride (VC). The primary benefits of ERD technology include ease of regulatory acceptance, in-situ nature and relatively low cost.