Impact of Interfacial Tension and Critical Micelle Concentration on Bilgewater Oil Separation

Church, Jared; Willner, Marjorie R.; Renfro, Brittany R.; Chen, Yun; Diaz, Daniela; Lee, Woo Hyoung; Dutcher, Cari S.; Lundin, Jeffrey G.; Paynter, Danielle M.

doi:10.1016/j.jwpe.2020.101684

Cited by 21 publications

(14 citation statements)

References 36 publications

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“…38 In general, the emulsions observed in this study were considerably less stable than emulsions previously prepared using commercial cleaners and detergents that contain high concentrations of water-soluble surfactants. 5,6 For example, bilgewater emulsions prepared with Type 1 detergent revealed a creaming rate that was more than 3 times slower than that of the emulsions generated in this study. However, the emulsion stabilization from fuel additives was still significant, particularly considering the potentially large volumes of bilgewater fuels, and components in fuels can have a major impact on bilgewater treatment in several ways.…”

Section: Identification Of Water-miscible Compounds Gc-msmentioning

confidence: 58%

“…This is demonstrated by the significant changes to the CMC when measured as a function of interfacial tension as compared to surface tension. 6 For example, urea, short-chain alcohols, and water-soluble esters are known to modify the interaction of water with the surfactant molecule by modifying water's dielectric constant or solubility parameter. 7,8 In addition, it is well accepted that a broad variety of chemical additives is introduced to fuels and lubricating oils in order to improve their properties.…”

Section: Introductionmentioning

confidence: 99%

“…We have also shown that small amounts of organic materials from an oil phase may produce significant changes in the critical micelle concentration (CMC). This is demonstrated by the significant changes to the CMC when measured as a function of interfacial tension as compared to surface tension . For example, urea, short-chain alcohols, and water-soluble esters are known to modify the interaction of water with the surfactant molecule by modifying water’s dielectric constant or solubility parameter. , …”

Section: Introductionmentioning

confidence: 99%

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Stabilization of Bilgewater Emulsions by Shipboard Oils

et al. 2021

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The removal of oil from bilgewater is necessary for compliance with national and international maritime regulations; however, the formation of stable oil-in-water emulsions makes oil separation difficult. Therefore, it is necessary to understand the physical and chemical properties of emulsions created in bilgewater. Recent experiments have demonstrated that synthetic bilgewater emulsions can be stabilized in the absence of surfactants or cleaners. Consequently, the objective of this study was to determine if compounds found in fuels and lubricating oils can significantly contribute to bilgewater emulsion stability. Surface tension, conductivity, emulsion stability, and GC-MS measurements were conducted to determine transportation of oil additives into the aqueous phase. Results revealed that small polar compounds in common shipboard fuels and lubricants were capable of migrating from the oil phase to the aqueous phase. In particular, it was found that oxygenated alkanes and monoaromatic compounds are likely responsible for the stabilization of bilgewater emulsions. These compounds were found in the highest concentrations in diesel fuel and were found to stabilize simulated bilgewater emulsions more than lubricating oils. Overall, this work shows shipboard oils can contribute to the stabilization of bilgewater emulsions, and further research is needed to determine the full impact of these additives.

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Section: Identification Of Water-miscible Compounds Gc-msmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stabilization of Bilgewater Emulsions by Shipboard Oils

et al. 2021

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“…Shown in the figure, when the surfactant concentration is low, the surface tension decreases sharply with increasing the concentration. The surface tension reaches a steady state with further increasing the concentration after reaching the critical micelle concentration (CMC), which is the minimum concentration required to form micelles 27 – 29 . The CMC is determined to be about 0.001 mol/L.…”

Section: Resultsmentioning

confidence: 99%

Novel abrasive-free jet polishing for Bulk single-crystal KDP with a low viscosity microemulsion

Zhang

Fan

Gao

et al. 2022

Sci Rep

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In present work, the abrasive-free jet polishing (AFJP) of bulk single-crystal KDP was first fulfilled, when using a newly-designed low-viscosity microemulsion as the AFJP fluid. The novel AFJP fluid shows a typical water-in-oil structure, in which the water cores uniformly distribute in the BmimPF6 IL, with a particle size of about 20–25 nm. What’s more, the AFJP fluid is a controllable and selective non-abrasive jet fluid that the shape of the removal function is regular and smooth, presenting a similar Gaussian function, meanwhile, the dispersion coefficient of the removal rate is only 1.9%. Finally, the surface quality of the bulk single-crystal KDP is further improved by AFJP, meanwhile, the subsurface damage is first obviously mitigated.

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“…Therefore, micellization can enhance the solubilization of NAPLs from residual trapped ganglia and/or adsorbed phases [20,21]. The CMC is the total surfactant concentration at which the physicochemical property of the system (i.e., surface or interfacial tension) varies the most, and above which, it becomes independent of the surfactant concentration [22,23]. Under the same conditions (e.g., temperature, pressure, pH, ionic strength), micellization strongly depends on the structural molecular properties of the surfactant, such as the size of the head group, length of the alkyl chain, presence of branches, unsaturation, and/or polar groups.…”

Section: Introductionmentioning

confidence: 99%

Synthetic and Natural Surfactants for Potential Application in Mobilization of Organic Contaminants: Characterization and Batch Study

Amanat

Barbati

Rossi

et al. 2022

Water

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In this paper, we investigated the abilities of five sugar-based synthetic surfactants and biosurfactants from three different families (i.e., alkyl polyglycoside (APG), sophorolipid (SL), and rhamnolipid (RL)) to dissolve and mobilize non-aqueous phase liquid (NAPL) components, i.e., toluene and perchloroethylene (PCE), adsorbed on porous matrices. The objective of this study was to establish a benchmark for the selection of suitable surfactants for the flushing aquifer remediation technique. The study involved a physicochemical characterization of the surfactants to determine the critical micelle concentration (CMCs) and interfacial properties. Subsequently, a batch study, through the construction of adsorption isotherms, made it possible to evaluate the surfactants’ capacities in contaminant mobilization via the reduction of their adsorptions onto a reference adsorbent material, a pine wood biochar (PWB). The results indicate that a synthetic surfactant from the APG family with a long fatty acid chain and a di-rhamnolipid biosurfactant with a shorter hydrophobic group offered the highest efficiency values; they reduced water surface tension by up to 54.7% and 52%, respectively. These two surfactants had very low critical micelle concentrations (CMCs), 0.0071 wt% and 0.0173 wt%, respectively; this is critical from an economical point of view. The batch experiments showed that these two surfactants, at concentrations just five times their CMCs, were able to reduce the adsorption of toluene on PWB by up to 74% and 65%, and of PCE with APG and RL by up to 65% and 86%, respectively. In general, these results clearly suggest the possibility of using these two surfactants in surfactant-enhanced aquifer remediation technology.

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Impact of Interfacial Tension and Critical Micelle Concentration on Bilgewater Oil Separation

Cited by 21 publications

References 36 publications

Stabilization of Bilgewater Emulsions by Shipboard Oils

Stabilization of Bilgewater Emulsions by Shipboard Oils

Novel abrasive-free jet polishing for Bulk single-crystal KDP with a low viscosity microemulsion

Synthetic and Natural Surfactants for Potential Application in Mobilization of Organic Contaminants: Characterization and Batch Study

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