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PILOT-SCALE EVALUATION OF THE IRON-ENHANCED DECHLORINATION TECHNOLOGY FOR REMEDIATION OF CONTAMINATED GROUNDWATER
Citation:
Chen*, C T., S. L. Liao**, AND J J. Yezzi* Jr. PILOT-SCALE EVALUATION OF THE IRON-ENHANCED DECHLORINATION TECHNOLOGY FOR REMEDIATION OF CONTAMINATED GROUNDWATER. In Proceedings, World Environmental Congress, Cincinnati, OH, October 26 - 29, 1996. (1996).
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Description:
An iron-enhanced dechlorination technology was evaluated, under the U.S. Environmental Protection Agency (EPA) Superfund Innovative Technology Evaluation (SITE) program, at a contaminated printed circuit board manufacturing site in New Jersey. This paper describes the feasibility of this technology to dechlorinate volatile organic compounds (VOCs) in groundwater, the treatment process and cost data. This process was demonstrated using a pilot-scale, aboveground treatment reactor containing the reactive iron medium. Approximately 60,800 gallons of groundwater were treated during this demonstration. The results indicated that this process degrades more than 99% of the total chlorinated VOCs in water treated, and consistently achieved the demonstration effluent target level of 1 ug/L for trichloroethene (TCE) and tetrachloroethene (PCE). During the last two weeks of the demonstration, the process did not consistently achieve the effluent target levels of 2 ug/L for vinyl chloride (VC) and 5 ug/L for cis-1,2-dichloroethene (cDCE). This may be due to a gradual reduction in the iron's reactive surface area through formation of metal precipitates. Based on information obtained from the SITE demonstration, groundwater remediation costs for an aboveground reactor using the iron-enhanced dechlorination process are estimated to be about $90 per 1,000 gallons treated. [Paper available at NTIS as PB97195549.]
