Recovery of an anionic surfactant in the presence of benzene, toluene, and hexane by foam fractionation

Kumar, Awadh Kishor; Ghosh, Pallab

doi:10.1007/s13762-021-03796-z

Cited by 4 publications

(3 citation statements)

References 63 publications

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“…Foaming requires the presence of surfactants to reduce the surface tension of the liquid phase and facilitate the formation of stable foam lamellae. However, due to the hydrophobic nature of toluene, surfactant molecules may not effectively adsorb at the air–liquid interface, leading to an inadequate reduction in surface tension and the inability to initiate foam formation 35 . Moreover, toluene is known to dissolve and disrupt the structure of many common surfactants used in foam formation.…”

Section: Resultsmentioning

confidence: 99%

An experimental study of foam-oil interactions for nonionic-based binary surfactant systems under high salinity conditions

Bello,

Ivanova,

Bakulin

et al. 2024

Sci Rep

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A key factor affecting foam stability is the interaction of foam with oil in the reservoir. This work investigates how different types of oil influence the stability of foams generated with binary surfactant systems under a high salinity condition. Foam was generated with binary surfactant systems, one composed of a zwitterionic and a nonionic surfactant, and the other composed of an anionic and a nonionic surfactant. Our results showed that the binary surfactant foams investigated are more tolerant under high salinity conditions and in the presence of oil. This was visually observed in our microscopic analysis and was further attributed to an increase in apparent viscosity achieved with binary surfactant systems, compared to single surfactant foams. To understand the influence of oil on foam stability, we performed a mechanistic study to investigate how these oils interact with foams generated with binary surfactants, focusing on their applicability under high salinity conditions. The generation and stability of foam are linked to the ability of the surfactant system to solubilize oil molecules. Oil droplets that solubilize in the micelles appear to destabilize the foam. However, oils with higher molecular weights are too large to be solubilized in the micelles, hence the molecules will have less ability to be transported out of the foam, so oil seems to stabilize the foam. Finally, we conducted a multivariate analysis to identify the parameters that influenced foam stability in different oil types, using the experimental data from our work. The results showed that the oil molecular weight, interfacial tension between the foaming liquid and the oil, and the spreading coefficient are the most important variables for explaining the variation in the data. By performing a partial least square regression, a linear model was developed based on these most important variables, which can be used to predict foam stability for subsequent experiments under the same conditions as our work.

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Section: Resultsmentioning

confidence: 99%

An experimental study of foam-oil interactions for nonionic-based binary surfactant systems under high salinity conditions

Bello,

Ivanova,

Bakulin

et al. 2024

Sci Rep

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show abstract

“…During the removal of surfactant micropollutants from a liquid in a bubble column, surfactant molecules are adsorbed on air bubble surfaces, and the generated foam contains a higher amount of the surfactant than the remaining liquid solution . This method is called bubble separation or foam fractionation, which is used in protein purifications, − pharmaceutical and micropollutant removals, − and wastewater treatments. − This is very important considering that some of these chemicals are also surfactants, and foam fractionation is an effective separation method for surfactant removal from a solution containing a low surfactant concentration.…”

Section: Introductionmentioning

confidence: 99%

“… 1 This method is called bubble separation or foam fractionation, which is used in protein purifications, 2 − 5 pharmaceutical and micropollutant removals, 6 − 8 and wastewater treatments. 9 − 11 This is very important considering that some of these chemicals are also surfactants, and foam fractionation is an effective separation method for surfactant removal from a solution containing a low surfactant concentration.…”

Section: Introductionmentioning

confidence: 99%

Model for Investigating Relationships between Surfactant Micropollutant Properties and Their Separation from Liquid in a Bubble Column

et al. 2023

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The removal of surfactant micropollutants, such as dyes, pharmaceuticals, and proteins, through foam is very important in biotechnology and wastewater treatment. The literature shows that previous models consider mass balances within the foam but not the adsorption dynamics of micropollutant surfactants on bubble surfaces in the liquid solution. Thus, the main objective of this work is to examine the removal of surfactant micropollutants in a bubble column considering both mass balance and adsorption dynamics to calculate surfactant transport from the liquid bulk to the bubble surface. This allows investigation of the relationships between surfactant hydrophobicity and surfactant separation efficiency from the liquid. It was found that the removal of the surfactant strongly depends on the dynamic adsorption behavior of surfactant on bubble surfaces, and the highest foam fractionation performance was achieved when the surfactant molecule was highly hydrophobic. This work demonstrates that the adsorption dynamics rather than adsorption thermodynamics on bubble surfaces is critical when modeling the removal of surfactant micropollutants from water solutions.

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Liquid foams: Properties, structures, prevailing phenomena and their applications in chemical/biochemical processes

Ashrafizadeh,

Ganjizade

2024

Advances in Colloid and Interface Science

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Recovery of an anionic surfactant in the presence of benzene, toluene, and hexane by foam fractionation

Cited by 4 publications

References 63 publications

An experimental study of foam-oil interactions for nonionic-based binary surfactant systems under high salinity conditions

An experimental study of foam-oil interactions for nonionic-based binary surfactant systems under high salinity conditions

Model for Investigating Relationships between Surfactant Micropollutant Properties and Their Separation from Liquid in a Bubble Column

Liquid foams: Properties, structures, prevailing phenomena and their applications in chemical/biochemical processes

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