Abstract
The mineralization by an Arthrobacter sp. of naphthalene initially dissolved in di(2-ethylhexyl)phthalate exhibited a slow phase followed by a rapid phase. Triton X-100, which inhibited cell attachment, prevented the onset of the second phase. Triton X-100 increased the extent of mineralization of naphthalene initially present in 2,2,4,4,6,8,8-heptamethylnonane. Cells attached to the interface mineralized the aromatic hydrocarbon at a rate four times higher than the rate of partitioning in the absence of microorganisms, but this microbial activity was markedly reduced by Triton X-100. We suggest that utilization of naphthalene originally present in nonaqueous-phase liquids may involve a partitioning-limited initial stage carried out by bacteria freely suspended in the aqueous phase and a subsequent, more rapid stage effected by bacteria present directly at the nonaqueous-liquid-water interface.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Ascon-Cabrera M., Lebeault J. M. Selection of xenobiotic-degrading microorganisms in a biphasic aqueous-organic system. Appl Environ Microbiol. 1993 Jun;59(6):1717–1724. doi: 10.1128/aem.59.6.1717-1724.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Efroymson R. A., Alexander M. Biodegradation by an arthrobacter species of hydrocarbons partitioned into an organic solvent. Appl Environ Microbiol. 1991 May;57(5):1441–1447. doi: 10.1128/aem.57.5.1441-1447.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Rosenberg M., Rosenberg E. Role of adherence in growth of Acinetobacter calcoaceticus RAG-1 on hexadecane. J Bacteriol. 1981 Oct;148(1):51–57. doi: 10.1128/jb.148.1.51-57.1981. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Wodzinski R. S., Larocca D. Bacterial growth kinetics on diphenylmethane and naphthalene-heptamethylnonane mixtures. Appl Environ Microbiol. 1977 Mar;33(3):660–665. doi: 10.1128/aem.33.3.660-665.1977. [DOI] [PMC free article] [PubMed] [Google Scholar]