1 / 14

Principles of Microbial PAH-degradation in Soil

Principles of Microbial PAH-degradation in Soil. A.R. Johnsen et al. 2005 Environmental Pollution. 133, 71-84. P olycyclic A romatic H ydrocarbons 3+ fused benzene rings Incomplete combustion of organic matter Vehicle emissions Industrial coal gasification Wood preservatives.

nita
Download Presentation

Principles of Microbial PAH-degradation in Soil

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Principles of Microbial PAH-degradation in Soil A.R. Johnsen et al. 2005 Environmental Pollution. 133, 71-84

  2. Polycyclic Aromatic Hydrocarbons • 3+ fused benzene rings • Incomplete combustion of organic matter • Vehicle emissions • Industrial coal gasification • Wood preservatives

  3. Microbial Growth • Limited by dissolved amounts • Sorbed, NAPL-dissolved less bioavailable

  4. Soil Growth • Conditions not ideal • Absorbed • Inaccessible pores • Predation • Lack of diffusion

  5. Metabolism

  6. Anaerobic Degradation • Increasing evidence of NO3- and SO42- use • Implications for sediments, aquifers, and other anoxic environments

  7. Maximizing PAH Access Q/t = -DA(C0-Ct)/x

  8. I. Biosurfactants and Bioemulsifiers

  9. II. Diffusion DistanceIII. Concentration Gradient

  10. Consortia • Bacterial consortia • Bacterial-fungal consortia • Bacterial-multicellular animal consortia Mite Springtail Fungal Hyphae Round Worm

  11. Multiple means of degradation • Common traits • Consortia

  12. References • Johnsen at al., 2005. “Principles of microbial PAH-degradation in soil”. Environmental Pollution. 133:71-84 • Cerniglia, C.E., 1984. “Microbial metabolism of polycyclic aromatic hydrocarbons”. Advances in Applied Microbiology. 30, 31-71 • Cerniglia, C.E., 1992. “Biodegradation of polycyclic aromatic hydrocarbons”. Biodegradation. 3, 351-358

More Related