Surfactant-enhanced Removal of Hydrophobic Oils from Source Zones

Wu, Bin; Cheng, Hefa; Childs, Jeffrey D.; Sabatini, David A.

doi:10.1007/0-306-46928-6_11

Cited by 12 publications

(11 citation statements)

References 29 publications

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“…2 diesel, which represent oils of intermediate hydrophobicity or equivalent alkane carbon number (EACN, * 6 and 12-14 for limonene and diesel, respectively [20,21]) and are of interest in formulations used for hard surface cleaners, environmental remediation and biodiesel applications [22][23][24][25][26]. Limonene (98 ?…”

Section: Methodsmentioning

confidence: 99%

Formulating Alcohol‐Free Microemulsions Using Rhamnolipid Biosurfactant and Rhamnolipid Mixtures

Nguyên

Sabatini

2008

J Surfact & Detergents

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This research focused on developing alcoholfree biosurfactant-based microemulsions. Rhamnolipidbased mixtures were found to have double the solubilization parameter as compared to sodium bis(2-ethyl) dihexyl sulfosuccinate/sodium dihexyl sulfosuccinate/sodium mono-and dimethyl naphthalene sulfonate at the same total molar concentration. For the first time, a phase diagram was developed for surfactant mixtures containing soy methyl ester ethoxylate, rhamnolipid and oleyl alcohol with limonene oil. This phase diagram can be used as a guideline for selecting a surfactant system and surfactant ratio to formulate microemulsions with a given oil. In addition, the alcohol-free biosurfactant-based microemulsions required reasonable salinity values for limonene, making it viable in a variety of applications.

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Section: Methodsmentioning

confidence: 99%

Formulating Alcohol‐Free Microemulsions Using Rhamnolipid Biosurfactant and Rhamnolipid Mixtures

Nguyên

Sabatini

2008

J Surfact & Detergents

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“…AOT and W-13 were selected to be the primary surfactants in the experiment due to their branched hydrophobe structures. It has been shown that AOT and W-13 are able to create microemulsions with different hydrocarbon liquids and achieve low IFT's with proper co-surfactant additions [Wu et al, 2002;Shiau, 2005;2006;Hsu, 2006]. In addition, two petroleum sulfonate surfactants, S-1 and M-3, were also tested for their potentials to form microemulsions with crude oil.…”

Section: Methods: Phase Behavior Studiesmentioning

confidence: 99%

Next Generation Surfactants for Improved Chemical Flooding Technology

Wesson¹,

Lohateeraparp²,

Harwell³

et al. 2012

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“…III II I I II II I I --3.0 I e III g III II I III II II I III --3.6 I III II f II I III II -I II II II a Calculated by using the Davies Method. [25,26] b Reference [27] c Calculated by using linear mixing rule. [16] d Assumed little or no oil solubilized within the micelle.…”

Section: Phase Behavior Studymentioning

confidence: 99%

Behavior of DNAPL mixture of organometallic and chlorinated solvent in the presence of surfactants and alcohols as density modifying agents

Talawat¹,

Sabatini²,

Tongcumpou³

2013

Journal of Environmental Science and Health, Part A

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This work evaluates the behavior of surfactant and alcohols in combination with a mixture of tributyltinchloride (TBT) and tetrachloroethylene (PCE) with the goal of modifying the mixed oil from being a dense non-aqueous phase liquid (DNAPL) to a light non-aqueous phase liquid (LNAPL). Phase behavior of the mixed oil was studied under various combinations of surfactant, alcohol, and salinity. Phase density conversion was examined using pseudo-ternary phase diagrams constructed between the mixed oil, surfactant solution (4 wt%), and two types of alcohols (n-butyl alcohol (BuOH) and tert-butyl alcohol (TBA)). Aqueous phase solubilization and oil phase density modification were studied at varying alcohol to surfactant (A/S) ratios. The results showed that the optimum surfactant system was sodium dihexylsulfosuccinate (SDHS) and hexadecyl diphenyloxidedisulfonate (C16DPDS) (3.6 wt% and 0.4 wt%, respectively) with salt (NaCl) of 3 wt%. From pseudo-ternary phase diagrams, BuOH was found to produce a larger LNAPL region than TBA. From solubilization studies, the surfactant system plus either TBA or BuOH caused PCE preferential solubilization and this preference was more pronounced at higher total surfactant concentration in the system with TBA addition. In terms of density modification, BuOH produced lower oil density than TBA at high A/S ratio. This phase behavior knowledge can be used to optimize site remediation of organometallic DNAPLs.

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Surfactant-enhanced Removal of Hydrophobic Oils from Source Zones

Cited by 12 publications

References 29 publications

Formulating Alcohol‐Free Microemulsions Using Rhamnolipid Biosurfactant and Rhamnolipid Mixtures

Formulating Alcohol‐Free Microemulsions Using Rhamnolipid Biosurfactant and Rhamnolipid Mixtures

Next Generation Surfactants for Improved Chemical Flooding Technology

Behavior of DNAPL mixture of organometallic and chlorinated solvent in the presence of surfactants and alcohols as density modifying agents

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