Installation Restoration General Environmental Technology Development. Task 8. Bench-Scale Investigation of Low Temperature Thermal Removal of TCE (Trichloroethylene) from Soil.
Final rept. Jun 84-Feb 85,
WESTON (ROY F) INC WEST CHESTER PA
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Bench-scale studies were performed to demonstrate the viability of the concept of low temperature thermal volatilization of TCE from soils. A factorial experimental design using multi-way Analysis of Variance ANOVA for data analysis was employed. Factors were type of soil 3 levels, TCE concentration 2 levels, operating temperature 3 levels, and moisture content 2 levels. Duplicates were run. TCE can be stripped from contaminated soils under the conditions of this study. Varying amount of TCE were not stripped from the tested soil at all experimental conditions at temperatures less than 120 degrees C. The content of these residuals was verified by independent analysis to be TCE. Only TCE was displayed as output traces by the experimental apparatus. All of the experimental factors and each of their binary combination were statistically significant to the magnitude of TCE residual concentrations. Operating temperature was the dominant factor. Engineering data implications based on experimental results are Operating temperatures for pilot-scale equipment should be greater than or equal to 120 degrees C for complete removal of TCE in less than 20 minutes. Pilot-scale equipment should be of sufficient flexibility to permit verification of the results of this study and experimentation to optimize operating parameters.
- Civil Engineering