Estudio Experimental de la Tensión Interfacial Transitoria para Sistemas Alcanos-Agua-Triton X-100 empleando la Técnica de la Gota Emergente

Zeppieri, Susana; Ramírez, Yurimia; Molina, Jéssica; Ramos, Aura López de

doi:10.4067/s0718-07642009000600015

Cited by 3 publications

(3 citation statements)

References 17 publications

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“…For the experiments under different controlled temperatures, the fluid densities were selected from Pardo et al (2001), as well as the corresponding values of the surface and interfacial tension were compared from Giner et al (2007); Rolo et al (2002); Zeppieri et al (2009);Goebel and Lunkenheimer (1997). The experimental results are presented in the next section.…”

Section: Methodsmentioning

confidence: 99%

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Surface Tension and Interfacial Tension Measurements in Water-Surfactant-Oil Systems Using Pendant Drop Technique

Cortes-Estrada

Ibarra-Bracamontes

Aguilar-Corona

et al. 2013

Environmental Science and Engineering

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The study and modeling of physical properties such as surface tension and interfacial tension are important factors in the formation and stability of fluid systems such as emulsions. The present work shows the experimental results for surface tension and interfacial tension measurements in water and/or oils systems in the presence of surfactants, using the pendant drop technique. Distilled water and straightchain alkanes such as hexane, dodecane and hexadecane were used. The surfactants employed were sodium dodecyl sulphate (SDS) and sorbitan monooleate (SPAN 80), which are hydrophilic and lipophilic surfactants respectively. Some results show the dependence of surface tension or interfacial tension with respect to the surfactant concentration, other results were obtained by varying the temperature in a range from 20 to 60 • C.

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Section: Methodsmentioning

confidence: 99%

“…where y is the vertical coordinate, ρ is the density difference between both fluid phases, R 0 is the curvature radius of the drop bottom, H refers to its average curvature (which is a function of y) (Zeppieri et al 2009). Figure 1 shows a sketch of the experimental setup used to obtain the measurements under controlled temperature conditions.…”

Section: Methodsmentioning

confidence: 99%

Surface Tension and Interfacial Tension Measurements in Water-Surfactant-Oil Systems Using Pendant Drop Technique

Cortes-Estrada

Ibarra-Bracamontes

Aguilar-Corona

et al. 2013

Environmental Science and Engineering

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show abstract

“…Los surfactantes poseen una gran variedad de aplicaciones industriales como emulsificantes, desemulsificantes, agentes humectantes, formadores de espuma y se emplean como detergentes. Su utilización en biorremediación de suelos y recuperación mejorada de petróleo cada vez gana más importancia (Aguilar, 2014) Con el uso de surfactantes se aumenta la remoción y velocidades de biodegradación de hidrocarburos, por lo que diversos autores los han propuesto en la biorremediación de suelos (Zeppieri et al, 2009;Banat et al 2010). Los tensoactivos incrementan la dispersión y solubilización acuosa de los compuestos de baja solubilidad en varios órdenes de magnitud y aumentan la hidrofobicidad de la superficie celular, necesaria para la adhesión al hidrocarburo y para la toma de nutrientes a partir de estos.…”

Section: Uso De Surfactantes En La Biorremediaciónunclassified

Producción y evaluación de un biosurfactante para la biorremediación de suelos contaminados con hidrocarburos

Campos¹

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Heavy crude oils are comprised of different fractions of asphaltenes, resins, aromatic and saturated compounds, which contribute to their high viscosities, making them intrinsically difficult to biodegrade. Besides, contaminated soils that contain limestone rocks are preferably oil wet, which makes their removal difficult. Biosurfactants are capable of modifying the wettability of rock/oil/water system and reduce interfacial tension, which promotes the release of oil, making it bioavailable. The objective of this work was to produce and evaluate a biosurfactant biosynthesized by a strain of Bacillus subtilis to improve the biodegradation of a heavy crude oil impregnated in limestone sand. The biosurfactant production was carried out in a 3L stirred reactor. The biosurfactant activity was determined at different temperatures, pH and salinities to establish its stability. Interfacial tension and contact angle were evaluated to determine the mechanisms involved in heavy oil release. Finally, the effect of the biosurfactant on the release of heavy oil impregnated in limestone sand was elucidated, for its subsequent biodegradation using a strain of Rhodococcus sp. It was found that the maximum CO₂ production rate, used as an indicator of biological activity, improved by 32.84% in systems where biosurfactant was used, compared to those where it was not used. At least 67% of the fraction > C₂₀ was degraded in the systems with biosurfactant, reducing the aromatic and resin fractions (12.5% and 2%, respectively), while in systems without biosurfactant only 37% was removed of the fraction > C₂₀ and the reduction of aromatics and resins was null. The biosurfactant proved to be effective in the release of crude oil and significantly improved the biodegradation process.

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Adsorption of Triton X-100 in aqueous solution on activated carbon obtained from waste tires for wastewater decontamination

2019

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Estudio Experimental de la Tensión Interfacial Transitoria para Sistemas Alcanos-Agua-Triton X-100 empleando la Técnica de la Gota Emergente

Cited by 3 publications

References 17 publications

Surface Tension and Interfacial Tension Measurements in Water-Surfactant-Oil Systems Using Pendant Drop Technique

Surface Tension and Interfacial Tension Measurements in Water-Surfactant-Oil Systems Using Pendant Drop Technique

Producción y evaluación de un biosurfactante para la biorremediación de suelos contaminados con hidrocarburos

Adsorption of Triton X-100 in aqueous solution on activated carbon obtained from waste tires for wastewater decontamination

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