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Microbial Degradation of TCDD in A Model Ecosystem

  • F. Matsumura
  • John Quensen
  • G. Tsushimoto
Part of the Environmental Science Research book series (ESRH, volume 26)

Abstract

Microbial degradation of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) was studied by using pure culture isolates of microorganisms, terrestrial and aquatic model systems, and an outdoor pond. In each case metabolic activities were recognized by the appearance of metabolic products from 14C-TCDD. In the outdoor pond the apparent half-life of TCDD was in the order of one year, recoveries of TCDD after 12 and 25 months being 49.7 and 29.4 percent, respectively. In model systems metabolic activities on TCDD were stimulated by the addition of general nutrients such as glucose, bactopeptone and mannitol yeast. The two microbial isolates, Bacillus megaterium and Nocardiopsis sp., were found to degrade TCDD. The most important factor found to promote their metabolic activities was the nature of carrier solvent for TCDD. In this regard ethyl acetate gave the best results under the experimental conditions.

Keywords

Ethyl Acetate Microbial Degradation Model Ecosystem Bacillus Megaterium Solvent Phase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • F. Matsumura
    • 1
  • John Quensen
    • 1
  • G. Tsushimoto
    • 1
  1. 1.Pesticide Research CenterMichigan State UniversityEast LansingUSA

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