EPA 540-R-96/503
Metal-Enhanced Dechlorination of Volatile Organic
Compounds Using an Above-Ground Reactor
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Metal-Enhanced Dechlorination of Volatile Organic
Compounds Using an Above-Ground Reactor (356K)
ABSTRACT
EnviroMetal Technologies, Inc. Metal-Enhanced Dechlorination of
Volatile Organic Compounds Using
an Above-Ground Reactor
Innovative Technology Evaluation Report
EPA 540-R-96/503
June 1997
EnvironMetal Technology's metal-enhanced dechorination technology employs an
electrochemical process that involves oxidation of iron and reductive dehalogenation
of halogenated VOCs in aqueous media. The process can be operated as an above
ground reactor or can alternatively perform in situ groundwater remedation.
The metal-enhanced dechlorination process is designed to degrade chlorinated
VOCs to nonhazardou substances (non-halogenated hydrocarbons and inorganic halides),
and therefore offers an alternative to conventional technologies that simply
transfer VOCs from groundwater to other media. The technology is capable of
degrading a wide variety of disolved chlorinated alkanes and alkenes occuring
in groundwater, including trichloroehene (TCE) , tetrachloroethene, and 1,2-dichloroethene
(DCE). An above ground version of this technology was evaluated under the USEPA
SITE Program over a 13 week period (November 1994 - February 1995) at a printed
circuit board site in New Jersey. The demonstration involved the treatment of
61,000 gallons of groundwater containing PCE, TCE and cDCE. Demonstration results
showed that PCE and TCE were reduced below regulatory levels after a single
pass through the reactive iron medium. Removal efficiency for PCE was greater
than 99.9% throughout the demonstration. Incomplete dechlorination of VOCs during
later portions of the demonstation may have resulted in cDCE and vinyl chloride
being occasionally detected in the effluent. Groundwater remediation costs in
the above ground reactor are estimated to be about $91/1,000 gallons treated.
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Posted February 26, 1999
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