Influence of Anionic Surfactants on Bioremediation of Hydrocarbons

Jd, Rouse; Da, Sabatini; Jh, Harwell

doi:10.1021/bk-1995-0594.ch010

Cited by 3 publications

(2 citation statements)

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“…The inhibiting activity of surfactants toward microbial transformation processes is usually accounted for via one or a combination of three mechanisms: decreased bioavailability of the contaminant because of micellar solubilization [48], uptake of the surfactant as a preferential substrate over the contaminant [25,49], or interaction of the surfactant with vital components of the microorganism [27,50,51]. Experiments investigating the effect of Steol CS‐330 concentration demonstrated that both PCE and TCE in a micellar solution are rapidly degraded, indicating that decreased bioavailability did not limit dechlorination.…”

Section: Resultsmentioning

confidence: 99%

Effects of surfactants on the dechlorination of chlorinated ethenes

McGuire¹,

Hughes

2003

Enviro Toxic and Chemistry

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The influence of surfactants on a perchloroethene (PCE) dechlorinating mixed culture was investigated in laboratory experiments. Surfactants (Steol CS-330, Aerosol MA 80-I, alpha olefin sulfonate 14 to 16, Neodol 25-7, Tween 80, alkyl polyglycoside, C16TAB [trimethylammonium bromide], and sodium dodecyl sulfate) were evaluated for their effects on the rate and extent of PCE reductive dechlorination and their potential biodegradation by the mixed culture. Limited, if any, surfactant biodegradation was observed for the surfactants tested, and all surfactants impaired dechlorination in either the rate of PCE dechlorination or the terminal dechlorination products observed. Based on initial testing, a nonionic surfactant, Tween 80, and an anionic surfactant, Steol CS-330, were selected for additional investigation. Dechlorination of PCE to dichloroethene (DCE), vinyl chloride (VC), and ethene (ETH) occurred in all Tween 80-amended microcosms, with a depressed rate of ETH production as the only adverse effect. Steol CS-330, however, inhibited dechlorination beyond DCE at all surfactant concentrations exceeding 25 mg/L. Attempts to acclimate a culture to Steol CS-330 were unsuccessful. Inhibition of VC and ETH production was reversible on dilution of the surfactant to a concentration of 10 mg/L or less, indicating that surfactant interactions with the enzyme system responsible for reductive dechlorination of DCE may be the cause of inhibition.

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Section: Resultsmentioning

confidence: 99%

Effects of surfactants on the dechlorination of chlorinated ethenes

McGuire¹,

Hughes

2003

Enviro Toxic and Chemistry

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“…Furthermore, these results compare well with results of naphthalene solubilization by other high Submitted for publication November 4, 1994; revised manu-A certain degree of recalcitrance to biodegradation of a surfactant is desirable, that is, the surfactant must survive long enough to perform its intended function (transport of contaminant, enhancement of bioavailability, and so on) before its demise. Another class of high performance anionic surfactants (DPDSs, Rouse et al, 1993) that are classified as biodegradable did not serve as substrates under the same testing conditions used here (Rouse et al, 1995). Further research under more environmentally realistic conditions (for example, soil systems) for extended periods of testing would be necessary to evaluate suitability for surfactant applications in the field.…”

Section: Also Included Inmentioning

confidence: 98%

Evaluation of ethoxylated alkylsulfate surfactants for use in subsurface remediation

Rouse¹,

Sabatini²,

Brown³

et al. 1996

Water Environment Research

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Experiments were conducted to evaluate the potential of ether sulfate surfactants with degrees of ethoxylation ranging from one to four per molecule for use in subsurface remediation. It was hypothesized that ethoxylated anionic surfactants will exhibit lower losses in the subsurface due to precipitation and sorption as a function of increasing ethoxylation while maintaining high hydrocarbon solubilization potentials. Results demonstrated that no significant precipitation of surfactant and calcium occurred where the degree of ethoxylation was two or greater. Sorption assays demonstrated that these ethoxylated anionic surfactants were less prone to sorption on soil than nonethoxylated anionic and non ionic surfactants. Furthermore, enhancements in solubilization of naphthalene were evidenced with increasing degrees of ethoxylation, and micelle-water partition coefficients were comparable with those of other high-performance surfactants. Microbial degradation assays indicated that these ethoxylated anionic surfactants served readily as substrates, raising concerns relative to their use in subsurface aerobic systems. However, they could be compatible with a treatment train concluded with a biological unit process.

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Foam Delivery of Hydrogen for Enhanced Aquifer Contacting and Anaerobic Bioremediation of Chlorinated Solvents

Hirasaki

Hughes²,

Miller³

2005

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Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Since September 11, 2001, re-organization within the United States Government has dominated the homeland security agenda. While this strategic focus is required, it has left numerous questions unanswered at the operational level. After four years, these new organizations are still wrestling with fundamental questions that require definitive answers in order to shape an effective homeland security and homeland defense solution. This paper provides an evaluation of the terms "defense" and "security," related interagency perspectives, and recent exercises that highlight operational command and control as a challenge. This review also highlights several inconsistencies that must be addressed before further steps can be taken to streamline an overarching operational construct. Several items are discussed which shape a solution to this interagency command and control problem. Most prominently is the evaluation of pros and cons of an interagency command at the operational level. Further discussions include structure, span of control, leadership, changes to law, duplication of effort, and leveraging other related activities. Recognition of the doctrinal principle of Unity of Command and Unity of Effort, defining the relationship between executive departments, and scoping National Guard involvement frames these discussions. Given the background of U.S. Government restructuring over the past four years, it is clear that the next logical step is integration. This paper recommends the establishment of an Interagency Command to accomplish this integration and provides a notional structure based on the DoD's combatant command construct. Related recommendations are made in the areas of strategic direction, term definitions, law, doctrine as well as training and education.

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Influence of Anionic Surfactants on Bioremediation of Hydrocarbons

Cited by 3 publications

References 0 publications

Effects of surfactants on the dechlorination of chlorinated ethenes

Effects of surfactants on the dechlorination of chlorinated ethenes

Evaluation of ethoxylated alkylsulfate surfactants for use in subsurface remediation

Foam Delivery of Hydrogen for Enhanced Aquifer Contacting and Anaerobic Bioremediation of Chlorinated Solvents

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