| Summary: | 碩士 === 國立暨南國際大學 === 土木工程學系 === 103 === In this study, a treatment train composed of chemical oxidation and anaerobic bioremediation was applied to remediate trichloroethylene (TCE)-contaminated groundwater. Soil and groundwater collected from a TCE-contaminated site were used for batch and column experiments. The treatment train used in this study consisted of persulfate oxidation, anaerobic bioremediation reagents, and persulfate release materials. Results of batch experiments show high concentrations of TCE (50 mg/L) could be removed rapidly by 1 to 5% persulfate addition during 1 day of reaction. The addition of 0.5% persulfate could also oxidize TCE completely during a 4-day reaction. Ferrous ion-activated persulfate may cause the residual of TCE due to the rapid consumption of persulfate by ferrous ions. Significant inhibition of soil bacteria was observed with the addition of persulfate higher than 2%. Results of microcosm study reveal dechlorinating bacteria were present at the site. The addition of 0.5% the commercial anaerobic bioremediation reagent, Eco-Clean, could enhance the dechlorination of TCE effectively. No significant effects on TCE removal were observed with thepresence of high concentrations of sulfate (5%). The results show the proposed treatment train would be feasible for groundwater remediation. However, field pilot study needs to be conducted to further evaluate the effectiveness of the treatment train on field applications.
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