| Autor: |
Du, Xiuying, Zhu, Naikai, Xia, Xijuan, Bao, Zhicheng, Xu, Xiaobai |
| Předmět: |
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| Zdroj: |
Journal of Environmental Science & Health. Part A. Toxic/Hazardous Substances & Environmental Engineering. Oct2001, Vol. 36 Issue 9, pN. 1p. |
| Abstrakt: |
Enhancement of biodegradability of polychlorinated dibenzo-p-dioxins (PCDDs) was studied with new isolated bacterial strains from soil and oxic-sediments contaminated by PCDDs. The results indicated that monoand di-chlorinated dibenzo-p-dioxins could be utilized as a sole carbon source and degraded by isolated bacterial strains, but tri-chlorinated dibenzo-p-dioxin (TrCDD) was hardly degraded. The biodegradability of TrCDD and tetra-chlorinated dibenzo-p-dioxin (TCDD) by the strain Pseudomonas sp. EE41, a new isolated one, could be enhanced through primary nutrient of co-metabolism of o-dichlorobenzene (o-DCB). In this case, TrCDD (1.2 mg/1 for 3 weeks) was degraded by 33.1% and the degradation rate enhanced more than 2 fold; also TCDD (0.1 mg/1 for 3 weeks) biodegraded by 37.8%. Most highly chlorinated, Penta-, Hexa-, Hepta-, and Octa-chlorinated, dibenzo-p-dioxins (P-CDD, H[SUB6-], H[SUB7]-CDD and OCDD) tested in this study could not be degraded while accumulated in bacterial cells. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
| Externí odkaz: |
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