Biodegradation of naphthalene in aqueous nonionic surfactant systems

The principal objective of this study was to quantify the bioavailability of micelle-solubilized naphthalene to naphthalene-degrading microorganisms comprising a mixed population isolated from contaminated waste and soils. Two nonionic surfactants were used, an alkylethoxylate, Brij 30 (C12E4), and...

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Bibliographic Details
Published in:Applied and Environmental Microbiology 1995-01, Vol.61 (1), p.145-151
Main Authors: Liu, Z.B. (Carnegie Mellon University, Pittsburgh, PA.), Jacobson, A.M, Luthy, R.G
Format: Article
Language:English
Subjects:
ACIDE SALICYLIQUE
ACIDO SALICILICO
BACTERIA
Bacteria - metabolism
BIODEGRADACION
BIODEGRADATION
Biodegradation of pollutants
Biodegradation, Environmental
BIODISPONIBILIDAD
BIODISPONIBILITE
Biological and medical sciences
Biotechnology
Brackish
DESINFECTANT
DESINFECTANTES
Environment and pollution
FLORA DEL SUELO
FLORE DU SOL
Freshwater
Fundamental and applied biological sciences. Psychology
Industrial applications and implications. Economical aspects
Marine
Micelles
MINERALISATION
MINERALIZACION
Naphthalenes - metabolism
Octoxynol - pharmacology
Polyethylene Glycols - pharmacology
SURFACTANT
SURFACTANTES
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Summary:The principal objective of this study was to quantify the bioavailability of micelle-solubilized naphthalene to naphthalene-degrading microorganisms comprising a mixed population isolated from contaminated waste and soils. Two nonionic surfactants were used, an alkylethoxylate, Brij 30 (C12E4), and an alkylphenol ethoxylate, Triton X-100 (C8PE9.5). Batch experiments were used to evaluate the effects of aqueous, micellized nonionic surfactants on the microbial mineralization of naphthalene and salicylic acid, an intermediate compound formed in the pathway of microbial degradation of naphthalene. The extent of solubilization and biodegradation under aerobic conditions was monitored by radiotracer and spectrophotometric techniques. Experimental results showed that surfactant concentrations above the critical micelle concentration were not toxic to the naphthalene-degrading bacteria and that the presence of surfactant micelles did not inhibit mineralization of naphthalene. Naphthalene solubilized by micelles of Brij 30 or Triton X-100 in liquid media was bioavailable and degradable by the mixed culture of bacteria
ISSN:0099-2240
1098-5336
DOI:10.1128/aem.61.1.145-151.1995