By National Research Council, Division on Engineering and Physical Sciences, Commission on Engineering and Technical Systems, Committee on In Situ Bioremediation
First released in 1993. Routledge is an imprint of Taylor & Francis, an informa corporation.
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Additional resources for In Situ Bioremediation: When Does It Work?
The aromatic benzene nucleus is susceptible to aerobic and anaerobic metabolism, although the latter occurs relatively slowly. Overall, however, the presence of halogen atoms on the aromatic ring governs biodegradability. A high degree of halogenation may prevent aromatic compounds from being aerobically metabolized, as is the case for highly chlorinated PCBs. However, as discussed above for the aliphatic compounds, anaerobic microbes can remove chlorine atoms from the highly halogenated aromatics.
Through a series of internal electron transfers catalyzed by the microorganisms, the organic contaminant is converted to innocuous compounds known as fermentation products. Examples of fermentation products are acetate, propionate, ethanol, hydrogen, and carbon dioxide. Fermentation products can be biodegraded by other species of bacteria, ultimately converting them to carbon dioxide, methane, and water. Secondary Utilization and Co-metabolism. In some cases, microorganisms can transform contaminants, even though the transformation reaction yields little or no benefit to the cell.
Please use the print version of this publication as the authoritative version for attribution. In Situ Bioremediation: When Does it Work? html INTRODUCTION Copyright © National Academy of Sciences. All rights reserved. 15 regulators, and academic researchers. The committee developed the framework for this report and the guidelines it presents at a one-week workshop in October 1992. Also included in this volume are seven background papers authored by committee members to represent the range of perspectives from which bioremediation can be viewed.