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DEGRADATION OF TRICHLOROETHYLENE UNDER HIGH-TEMPERATURE THERMAL SOURCE-ZONE REMOVAL CONDITIONS (POSTER PRESENTATION)
Citation:
COSTANZA, J. DEGRADATION OF TRICHLOROETHYLENE UNDER HIGH-TEMPERATURE THERMAL SOURCE-ZONE REMOVAL CONDITIONS (POSTER PRESENTATION). Presented at Battelle's Fifth International Conference on Remediation of Chlorinated and Recalcitrant Compounds, Monterey, CA, May 22 - 25, 2006.
Impact/Purpose:
To inform the public.
Description:
Trichloroethylene (TCE) is a contaminant commonly found in the subsurface at industrial and military installations in the United States. Oxidation of TCE (C2HCl3) to carbon dioxide (CO2) and chloride ions (Cl-) has been reported to occur during in-situ thermal remediation based on results from experiments completed at temperatures below 120oC. Thermal conductive heating such as In-Situ Thermal Desorption (ISTD) achieves temperatures up to 800oC with the claim that gas-phase TCE is degraded while passing through a zone heated to between 500 and 700oC located close to each in situ heater well. Previous research has shown that heating gas phase TCE to greater than 300oC can result in the formation of phosgene (COCl2) along with higher molecular weight chlorinated compounds such as tetrachloroethylene (C2Cl4) and hexachloroethane (C2Cl6). The objective of this research was to determine the degradation products formed after passing TCE through a quartz tube heated between 60 and 800oC in effort to identify TCE degradation products that could potentially form during the high-temperature thermal treatment of TCE contaminated subsurface environments.