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Anaerobic Mineralization of Stable-Isotope-Labeled 2-Methylnaphthalene

By Elise R. Sullivan, Xiaoming Zhang, Craig Phelps and L. Y. Young

Abstract

An active sulfate-reducing consortium that degrades 2-methylnaphthalene (2-MNAP) at rates of up to 25 μM day−1 was established. Degradation was inhibited in the presence of molybdate and ceased in the absence of sulfate. As much as 87% of 2-[14C]MNAP was mineralized to 14CO2. 2-Naphthoic acid (2-NA) was detected as a metabolite, and incubation with either deuterated 2-MNAP or [13C]bicarbonate indicates that 2-NA is the result of oxidation of the methyl group. Also detected were carboxylated 2-MNAPs, suggesting the presence of an alternative pathway for 2-MNAP degradation

Topics: Environmental Microbiology and Biodegradation
Publisher: American Society for Microbiology
Year: 2001
DOI identifier: 10.1128/AEM.67.9.4353-4357.2001
OAI identifier: oai:pubmedcentral.nih.gov:93170
Provided by: PubMed Central
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