Catalysis of PAH biodegradation by humic acid shown in synchrotron infrared studies [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 2001. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- vp : digital, PDF file
- Additional Creators:
- Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- The role of humic acid (HA) in the biodegradation of toxic polycyclic aromatic hydrocarbons (PAHs) has been the subject of controversy, particularly in unsaturated environments. By utilizing an infrared spectromicroscope and a very bright, nondestructive synchrotron photon source, we monitored in situ and, over time, the influence of HA on the progression of degradation of pyrene (a model PAH) by a bacterial colony on a magnetite surface. Our results indicate that HA dramatically shortens the onset time for PAH biodegradation from 168 to 2 h. In the absence of HA, it takes the bacteria about 168 h to produce sufficient glycolipids to solubilize pyrene and make it bioavailable for biodegradation. These results will have large implications for the bioremediation of contaminated soils.
- Published through SciTech Connect., 09/26/2001., "lbnl--50239", " lbnl/als--43890", Environmental Science and Technology 36 6 ISSN 0013-936X; ESTHAG FT, and Holman, Hoi-Ying N.; Miller, Charles D.; Martin, Michael C.; McKinney, Wayne R.; Nieman, Karl; Borch, Thomas; Sorensen, Darwin L.; Sims, Ronald C.
- Funding Information:
- AC03-76SF00098 and 458121
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