Science Inventory

IN SITU DESTRUCTION OF CHLORINATED HYDROCARBON COMPOUNDS IN GROUNDWATER USING CATALYTIC REDUCTIVE REDUCTIVE DEHALOGENATION IN A REACTIVE WELL: TESTING AND OPERATIONAL EXPERIENCES. (R825421)

Citation:

McNab, J. R., R. Ruiz, AND M. Reinhard. IN SITU DESTRUCTION OF CHLORINATED HYDROCARBON COMPOUNDS IN GROUNDWATER USING CATALYTIC REDUCTIVE REDUCTIVE DEHALOGENATION IN A REACTIVE WELL: TESTING AND OPERATIONAL EXPERIENCES. (R825421). ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 34(1):149-153, (2000).

Description:

A groundwater treatment technology based on catalytic reductive
dehalogenation has been developed to efficiently destroy chlorinated
hydrocarbons in situ using a reactive well approach. The treatment process
utilizes dissolved H2 as an electron donor, in the presence of a
commercial palladium-on-alumina catalyst, to rapidly reduce common chlorinated
aliphatics such as trichloroethylene and tetrachloroethylene into nonchlorinated
hydrocarbons such as ethane. Rapid reaction rates permit the deployment of a
treatment unit within a dual-screened well bore, allowing contaminated
groundwater to be drawn from one water-bearing zone, treated within the well
bore, and discharged to an adjacent zone with only one pass through the system.
A demonstration groundwater treatment system based on this concept was evaluated
in a chlorinated hydrocarbon contaminated aquifer at a major Superfund site. The
system rapidly destroyed a variety of common contaminants such as TCE and PCE
and maintained its performance for a test period of 1 year. Operation of the
treatment system was optimized to maintain catalyst activity and to prevent
formation of intermediate compounds.

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Product Published Date: 01/01/2000
Record Last Revised: 12/22/2005
Record ID: 67849

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL CENTER FOR ENVIRONMENTAL RESEARCH