Degradation of Monochlorinated and Nonchlorinated Aromatic Compounds under Iron-Reducing Conditions.

Applied and Environmental Microbiology
J KazumiL Y Young

Abstract

The capacity for Fe(sup3+) to serve as an electron acceptor in the microbial degradation of monochlorinated and nonchlorinated aromatic compounds was investigated in anoxic sediment enrichments. The substrates tested included phenol, benzoate, aniline, their respective monochlorinated isomers, o-, m-, and p-cresol, and all six dimethylphenol isomers. Phenol and 2-, 3-, and 4-chlorophenol were utilized by anaerobic microorganisms, with the concomitant reduction of Fe(sup3+) to Fe(sup2+). The amount of Fe(sup2+) produced in the enrichments was 89 to 138% of that expected for the stoichiometric degradation of these substrates to CO(inf2), suggesting complete mineralization at the expense of Fe reduction. Under Fe-reducing conditions, there was initial loss of benzoate and 3-chlorobenzoate but not of 2- or 4-chlorobenzoate. In addition, there was initial microbial utilization of aniline but not of the chloroaniline isomers. There was also initial loss of o-, m-, and p-cresol in our enrichments. None of the dimethylphenol isomers, however, was degraded within 300 days. Furthermore, we tested the capacity of an Fe-reducing, benzoate-grown culture of Geobacter metallireducens GS-15 to utilize monochlorinated benzoates and phenols. G. ...Continue Reading

References

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Dec 1, 1990·Microbial Ecology·M M HäggblomL Y Young

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Citations

Aug 9, 2005·Applied and Environmental Microbiology·John D CoatesLaurie A Achenbach
Dec 14, 2004·Pest Management Science·Kara R SchmelzerRonald S Tjeerdema
May 7, 2003·Applied and Environmental Microbiology·Qiang He, Robert A Sanford
Oct 21, 2020·Environmental Science and Pollution Research International·Lavane KimVan Toan Pham
Jun 1, 1996·Current Opinion in Biotechnology·J K Fredrickson, Y A Gorby
Apr 20, 2004·Environmental Pollution·M M HäggblomL J Kerkhof
Feb 6, 2010·Environmental Science & Technology·Mengni ZhangAndrew G Stack
Oct 11, 2017·Environmental Science & Technology·Christy M Dykstra, Spyros G Pavlostathis
Aug 19, 2015·Environmental Science & Technology·Weimin SunDonna E Fennell

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