Applied Microbiology and Biotechnology

, Volume 48, Issue 5, pp 665–670

Enhancing the mineralization of [U-14C]dibenzo-p-dioxin in three different soils by addition of organic substrate or inoculation with white-rot fungi

  • P. Rosenbrock
  • R. Martens
  • F. Buscot
  • F. Zadrazil
  • J. C. Munch
ORIGINAL PAPER

DOI: 10.1007/s002530051113

Cite this article as:
Rosenbrock, P., Martens, R., Buscot, F. et al. Appl Microbiol Biotechnol (1997) 48: 665. doi:10.1007/s002530051113
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Abstract

The potential for aerobic mineralization of [U-14C]dibenzo-p-dioxin (DD) was investigated in samples of three different agricultural soils already contaminated with polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) by industrial activities. The influence of amendments, i.e. wheat straw and compost, and of soil treatment by inoculation with lignolytic fungi, grown on wheat straw substrate, was tested. All the soils tested contained an indigenous DD-mineralizing microflora. The soil characterized by the highest organic matter content and the highest content of soil microbial biomass displayed the best DD mineralization of 36.6% within 70 days, compared with the two organic-matter-poor soils with an endogenous DD mineralization of 19.5% and 23.3% respectively. Amendments with compost increased DD mineralization up to 28% in both soils with low organic matter and microbial biomass content, but did not affect mineralization in the organic-matter-rich soil. Addition of wheat straw had no constant influence on DD mineralization in the soils tested. The best DD mineralization resulted from inoculation with lignolytic white-rot fungi (Phanerochaete chrysosporium, Pleurotus sp. Florida, Dichomitus squalens) and with an unidentified lignolytic fungus, which was isolated originally from a long-term PCDD/F-contaminated soil. A mineralization of up to 50% within 70 days was reached by this treatment. The influence of inoculated fungi on mineralization differed between the soils investigated.

Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • P. Rosenbrock
    • 1
  • R. Martens
    • 1
  • F. Buscot
    • 2
  • F. Zadrazil
    • 1
  • J. C. Munch
    • 2
  1. 1.Federal Agricultural Research Center, Institute for Soil Biology, Bundesallee 50, D-38116 Braunschweig, Germany Tel.: +49 (0) 531 596 342 Fax: +49 (0) 531 595 375 e-mail: rosenbrock@bb.fal.deDE
  2. 2.GSF-National Research Center for Environment and Health, Institute for Soil Ecology, Ingolstädter Landstrasse 1, D-85764 Neuherberg near Munich, GermanyDE