Characterization of methane, benzene and toluene-oxidizing consortia enriched from landfill and riparian wetland soils

Eun Hee Lee, Hyunjung Park, Kyung Suk Cho

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The microbial oxidations of methane (M) and volatile organic compounds (VOCs) were compared with those of M and VOCs alone after enriching soil samples with M and/or VOCs. Landfill cover and riparian wetland soils from which M and VOCs were simultaneously emitted were selected as representative samples. Benzene (B) and toluene (T) were employed as the model VOCs. With the landfill soil consortia, the rate of M oxidation decreased from 4.15-5.56 to 2.26-3.42μmolg-dry soil-1h-1 in the presence of both B and T, but with the wetland soil consortia the rate of M oxidation (3.09μmolg-dry soil-1h-1) in the mixture of M as well as both B and T was similar to that of M alone (3.04μmolg-dry soil-1h-1). Compared with the methanotrophic community with M alone, the portion of type II methanotrophs was greater in the landfill consortia; whereas, the proportion in wetland consortia was less in the presence of both B and T. The oxidations of B and T were stimulated by the presence of M with both the landfill and wetland consortia. There were no correlations between the oxidation rate of M and those of B and T with the gene copy numbers of pmoA and tmoA responsible for the oxidations.

Original languageEnglish
Pages (from-to)313-320
Number of pages8
JournalJournal of Hazardous Materials
Issue number1-3
StatePublished - 2010

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education, Science and Technology (MEST) (NRL program, R0A-2008-000-20044-0). It was also supported through the Advanced Environmental Biotechnology Research Center at Pohang University of Science and Technology (2009-0079504) and the Basic Research Program (R01-2005-000-10268-0) of the NRF, MEST.


  • Methane
  • Methanotroph
  • PmoA
  • TmoA
  • Volatile organic compound


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