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KMID : 1024520070160101147
Journal of the Environmental Sciences
2007 Volume.16 No. 10 p.1147 ~ p.1155
Reductive Dechlorination of Groundwater Contaminated with PCE using Biobarrier: Column Study
Hwangbo Hyun-Wook

Shin Won-Sik
Song Dong-Ik
Abstract
The applicability of in situ biobarrier or microbial filter technology for the remediation of groundwater contaminated with chlorinated solvent was investigated through column study. In this study, the effect of packing materials on the reductive dechlorination of PCE was investigated using Canadian peat, Pahokee peat, peat moss and vermicompost (or worm casting) as a biobarrier medium. Optimal conditions previously determined from a batch microcosm study was applied in this column study. Lactate/benzoate was amended as electron donors to stimulate reductive dechlorination of PCE. Hydraulic conductivity was approximately and no difference was found among the packing materials. The transport and dispersion coefficients determined from the curve-fitting of the breakthrough curves of using CXTFIT 2.1 showed no difference between single-region and two-region models. The reductive dechlorination of PCE was efficiently occurred in all columns. Among the columns, especially the column packed with vermicompost exhibited the highest reductive dechlorination efficiency. The results of this study showed the promising potential of in situ biobarrier technology using peat and vermicompost for the remediation of groundwater contaminated with chlorinated solvents.
KEYWORD
Biobarrier, Reductive Dechlorination, Electron Donor, Peat, Vermicompost, Column, CXTFIT
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