S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Civil & Environmental Engineering (건설환경공학부) Journal Papers (저널논문_건설환경공학부)
Effect of soil aggregation on the biodegradation of phenanthrene aged in soil
- Nam, Kyoungphile; Kim, Jae Young; Oh, Dong Ik
- Issue Date
- Environ. Pollut. 121, 147-151
- A study was conducted to determine the possible role of soil aggregates in the sequestration of phenanthrene and thus in the
declined biodegradation of the hydrocarbon. Phenanthrene aged in Lima loam (2-mm aggregates) showed declined biodegradation
with time of aging to the test bacterium P5-2 capable of using sorbed phenanthrene. In contrast, the compound aged in a soil
reconstructed with 68% clay–silt and 32% sand that had been separated from the Lima loam was readily mineralized. The percentages
of each fraction used were the same as those of the original soil. Biodegradation of aged phenanthrene was not affected
significantly by varying the ratios of each fraction in reconstructed mixtures. In experiments with Lima loam, its clay–silt fraction,and its sand fraction, mineralization extent was much lower in soil aggregates compared with the other samples while all had similar organic carbon content of ca. 1.51%. This suggests that aggregation may be another important determinant in the reduced biodegradation of aged phenanthrene.
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