Kinetic model of biosurfactant-enhanced hexadecane biodegradation byPseudomonas aeruginosa

Sekelsky, Andrew M; Shreve, Gina S.

doi:10.1002/(sici)1097-0290(19990520)63:4<401::aid-bit3>3.0.co;2-s

Cited by 58 publications

(25 citation statements)

References 23 publications

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“…For example, Van Hamme and Ward (631) described a Rhodococcus strain that grew directly on crude oil droplets and could be removed with the addition of exogenous chemical surfactant, while a Pseudomonas strain required surfactant-solubilized oil to efficiently access hydrocarbons. In P. aeruginosa, hydrocarbon solubilization and micellar transport control hexadecane biodegradation during biosurfactant-enhanced growth (552). Similarly, encapsulating solid n-C18 and n-C36 in liposomes increased growth and biodegradation by a Pseudomonas sp., indicating that cell-liposome fusion may deliver encapsulated hydrocarbons to membrane-bound enzymes (427).…”

Section: Membrane Alterations Uptake and Effluxmentioning

confidence: 99%

Recent Advances in Petroleum Microbiology

Hamme¹,

Singh

Ward

2003

Microbiol Mol Biol Rev

1,203

640

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Recent advances in molecular biology have extended our understanding of the metabolic processes related to microbial transformation of petroleum hydrocarbons. The physiological responses of microorganisms to the presence of hydrocarbons, including cell surface alterations and adaptive mechanisms for uptake and efflux of these substrates, have been characterized. New molecular techniques have enhanced our ability to investigate the dynamics of microbial communities in petroleum-impacted ecosystems. By establishing conditions which maximize rates and extents of microbial growth, hydrocarbon access, and transformation, highly accelerated and bioreactor-based petroleum waste degradation processes have been implemented. Biofilters capable of removing and biodegrading volatile petroleum contaminants in air streams with short substrate-microbe contact times (<60 s) are being used effectively. Microbes are being injected into partially spent petroleum reservoirs to enhance oil recovery. However, these microbial processes have not exhibited consistent and effective performance, primarily because of our inability to control conditions in the subsurface environment. Microbes may be exploited to break stable oilfield emulsions to produce pipeline quality oil. There is interest in replacing physical oil desulfurization processes with biodesulfurization methods through promotion of selective sulfur removal without degradation of associated carbon moieties. However, since microbes require an environment containing some water, a two-phase oil-water system must be established to optimize contact between the microbes and the hydrocarbon, and such an emulsion is not easily created with viscous crude oil. This challenge may be circumvented by application of the technology to more refined gasoline and diesel substrates, where aqueous-hydrocarbon emulsions are more easily generated. Molecular approaches are being used to broaden the substrate specificity and increase the rates and extents of desulfurization. Bacterial processes are being commercialized for removal of H2S and sulfoxides from petrochemical waste streams. Microbes also have potential for use in removal of nitrogen from crude oil leading to reduced nitric oxide emissions provided that technical problems similar to those experienced in biodesulfurization can be solved. Enzymes are being exploited to produce added-value products from petroleum substrates, and bacterial biosensors are being used to analyze petroleum-contaminated environments

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Section: Membrane Alterations Uptake and Effluxmentioning

confidence: 99%

Recent Advances in Petroleum Microbiology

Hamme¹,

Singh

Ward

2003

Microbiol Mol Biol Rev

1,203

640

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“…Biosurfactants have been used for bioremediation of metal and organic-contaminated material, 74,97,134,137,193,204 and they may also have a utility in bioaugmentation applications either to protect a microbial inoculant from metal toxicity or to increase the amount of organic substrates available for degradation. 174,193 Sandrin et al 193 investigated the use of the metal-complexing biosurfactant rhamnolipid for decreasing metal toxicity in a model cocontaminated system.…”

Section: Bioaugmentation With Microbial-derived Materialsmentioning

confidence: 99%

New Approaches for Bioaugmentation as a Remediation Technology

Gentry

Rensing

Pepper

2004

Critical Reviews in Environmental Science and Technology

290

124

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“…Microbial biosurfactants are comprised of a wide variety of chemical structures including glycolipids, lipopeptides, phospholipids, fatty acids, neutral lipids, and certain polysaccharide-protein complexes. Biological surfactant synthesis is influenced by environmental conditions such as nitrogen availability and divalent cation concentration (Sekelsky & Shreve, 1999). Recently, compounds representing aquatic lipid classes (summarized in Table 1 of Striby et al, 1999) have been separated and quantified using a thin layer chromatography-flame ionization detection (TLC-FID) and used as biogeochemical markers for the comprehensive study of organic matter dynamics in relation to ecosystem functioning in the productive layers of the ocean (Goutx et al, 2003).…”

Section: Marine Surfactants -Origin and Diversitymentioning

confidence: 99%

Surface Rheology Parameters of Source-Specific Surfactant Films as Indicators of Organic Matter Dynamics

2006

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The paper contains the results of natural film experiments carried out on inland and coastal waters in the Dead Vistula catchment area and mouth during 2000-2002, using the integrated Langmuir troughWilhelmy plate system. The static film parameters result from the generalized scaling procedures applied to the surface pressure-area isotherms. They appear to reflect in a quantitative and sensitive way the film composition (A lim , M w , E isoth ), film solubility and the miscibility of its components (via R, DS c and y factors), and surface concentration (p eq , G eq ). The adsorption kinetics parameters: effective diffusion coefficient D eff /D and activation energy barrier E a /RT are derived from dynamic surface pressure. There is a reason to suggest that certain classes of film-forming components or 'end-members' may dominate the static and dynamic surface properties. Variation in the surface rheological parameters of source-specific biosurfactants is postulated to reflect organic matter dynamics in natural waters and were measured for the Dead Vistula river, its tributaries and the adjacent coastal area.

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Kinetic model of biosurfactant-enhanced hexadecane biodegradation byPseudomonas aeruginosa

Cited by 58 publications

References 23 publications

Recent Advances in Petroleum Microbiology

Recent Advances in Petroleum Microbiology

New Approaches for Bioaugmentation as a Remediation Technology

Surface Rheology Parameters of Source-Specific Surfactant Films as Indicators of Organic Matter Dynamics

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