| 초록 |
Sequential permeable reactive barriers (PRBs) consisting of chemical and biological reactive barrier were simulated for the degradation of 2,4,6-TCP in this study. Modified zero-valent iron (ZVI), palladium coated iron (Pd/Fe), was used as a reactive barrier material for the chemical dechlorination of 2,4,6-TCP and a sand column inoculated with anaerobic microbes was also used as a simulated biobarrier following the chemical barrier. Only phenol was detected in the effluent from the Pd/Fe column reactor, indicating that the complete dechlorination of 2,4,6-TCP to phenol was achieved. In the operation of biobarrier, about 200 µM of phenol has been completely removed with the residence time of 7-8 days. Consequently, the dechlorination prior to biodegradation can enhance the biodegradability of 2,4,6-TCP and sequential PRBs are strongly recommended for the in situ groundwater remediation. |
