Anaerobic Mineralization of Stable-Isotope-Labeled 2-Methylnaphthalene
Open Access
- 1 September 2001
- journal article
- Published by American Society for Microbiology in Applied and Environmental Microbiology
- Vol. 67 (9) , 4353-4357
- https://doi.org/10.1128/aem.67.9.4353-4357.2001
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 to14CO2. 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.Keywords
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