Effect of Tween surfactant components for remediation of toluene-contaminated groundwater

Lee, Dal-Heui; Kim, Eun-Sik; Chang, Ho‐Wan

doi:10.1007/bf02910586

Cited by 29 publications

(11 citation statements)

References 18 publications

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“…Similar EAB of films containing Tween-20 and soy lecithin as surfactants was observed when added with lemongrass, basil and citronella essential oils (P > 0.05). Tween-20 with higher hydrophobic-lipophilic balance (HLB) might be more effective in stabilising emulsion than Tween-80 (Lee et al, 2005). As a consequence, oil droplets were distributed more uniformly in the film containing Tween-20, in comparison with that having Tween-80 as the surfactant.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Characteristics and antioxidant activity of leaf essential oil–incorporated fish gelatin films as affected by surfactants

Tongnuanchan

Benjakul

Prodpran

2013

Int J of Food Sci Tech

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Summary Characteristics of film from fish skin gelatin incorporated with four leaf essential oils (lemongrass, basil, citronella and kaffir lime), as influenced by different surfactants (Tween‐20, Tween‐80 and soy lecithin), were investigated. Films incorporated with all essential oils had lower tensile strength with higher elongation at break and thickness, compared with control film (P < 0.05). Films added with Tween‐20 showed higher TS, compared with those containing other surfactants (P < 0.05). Water vapour permeability of films incorporated with all essential oils markedly decreased in comparison with control (P < 0.05). Films generally became darker and more yellowness, when incorporated with essential oils. Film containing basil essential oil had the highest DPPH radical– and ABTS radical–scavenging activities, compared with those added with other essential oils. Higher antioxidative activity was obtained in films containing essential oils when soy lecithin was used as surfactant, probably due to the combined effect of both constituents.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Characteristics and antioxidant activity of leaf essential oil–incorporated fish gelatin films as affected by surfactants

Tongnuanchan

Benjakul

Prodpran

2013

Int J of Food Sci Tech

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“…Singh et al (2007) señalan que cuando la concentración del surfactante tiene un valor por encima de la CMC se inhibe la biodegradación, lo que sugiere que el sustrato que está dentro de la micela no está biodisponible. La formación de estas micelas con compuestos hidrofóbicos favorecen la dispersión del mismo en medio acuoso aumentando la biodisponibilidad y por consiguiente la posibilidad de aumentar su biodegradación (Lee et al 2005). Un segundo parámetro es la tensión interfacial (TI) entre dos líquidos la cual depende de la fuerza de adhesión entre dos moléculas de un líquido y el otro, de esta manera la tensión interfacial entre dos líquidos está relacionada con la tensión superficial de cada líquido.…”

Section: Mecanismo De Acción De Los Biosurfactantesunclassified

Biosurfactantes y su papel en la biorremediación de suelos contaminados con plaguicidas

Cruz¹,

Sánchez-Salinas²,

Ortiz-Hernández³

2013

Rev Latinoam Biotecnol Ambient Algal

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ResumenLos biosurfactantes (BS) son un grupo de moléculas de origen microbiano que se caracterizan por ser anfipáticas, es decir que sus moléculas presentan dos partes diferentes, una hidrofóbica y otra hidrofílica. Son un grupo estructuralmente diverso de moléculas tensoactivas, que presentan en general menor toxicidad y mayor biodegradabilidad que los surfactantes sintéticos. Entre las aplicaciones más estudiadas de los BS están aquellas relacionadas con la industria del petróleo y la bioremediación de sitios o residuos contaminados con hidrocarburos. No obstante, los biosurfactantes pueden ser utilizados para otro tipo de compuestos xenobióticos, como es el caso de los plaguicidas. Estos compuestos permiten controlar la proliferación de plagas y enfermedades de los cultivos y del ganado, así como reducir o evitar las pérdidas en la producción de alimentos y contribuir al control de los vectores de diversas enfermedades. No obstante la importancia económica de los plaguicidas, es necesario destacar que su aplicación indiscriminada y sin control ha generado diversos problemas como intoxicación a seres humanos, efectos carcinogénicos, teratogénicos y mutagénicos, además de numerosos problemas ambientales como contaminación de mantos freáticos, aguas continentales y costeras; contaminación del suelo y bioacumulación en las cadenas alimentarias. Generalmente los plaguicidas son de naturaleza hidrofóbica, por lo que el uso de los BS puede ser prometedor en la remediación de sitios contaminados o en el tratamiento biotecnológico de residuos de plaguicidas. Palabras clave: biosurfactante, plaguicida, biorremediación, solubilidad AbstractBiosurfactants (BS) are a group of microbial molecules that are characterized as amphipathic, meaning that have two distinct parts, one hydrophobic and the other hydrophilic. These compounds are a group structurally diverse which generally have lower toxicity and higher biodegradability than synthetic surfactants. Typical applications of BS studied are those related to oil and bioremediation of sites contaminated with hydrocarbons or residues. However, BS can be used for other types of xenobiotics, such as pesticides. These compounds can control the spread of pests and diseases of crops and livestock, as well as reduce or prevent losses in food production and contribute to the control of vectors of various diseases. Despite the economic importance of pesticides, it should be noted that the indiscriminate and uncontrolled application has generated various problems like toxicity to humans, carcinogenic, teratogenic and mutagenic

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“…For this reason, some enhanced methods (e.g., surfactantenhanced flushing, polymer-enhanced flushing, cosolventenhanced flushing) are employed to improve the efficiency (Lee et al, 2005;Aydin et al, 2011;Silva et al, 2013). Figure 11 shows results of water flushing and surfactant-enhanced flushing to remove the entrapped LNAPL in the vertical fracture.…”

Section: The Disadvantage and Remediationmentioning

confidence: 96%

The behaviors of LNAPL migration and entrapment in a rough-walled vertical fracture

Xie

et al. 2017

Geosci J

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The migration of light non-aqueous phase liquids (LNAPLs) and their entrapment in unsaturated vertical fractures exhibit complex behaviors, such as upward LNAPL migration that follows water level rise. In this study, behavior of LNAPL migration and entrapment in a vertical rough-walled fracture was investigated with optical measurement. A series of experiments were preformed, including fracture drainage, LNAPL infiltration and accumulation in an unsaturated fracture, and upward LNAPL migration with water level rise. Experimental results indicate that the fracture aperture significantly influences the LNAPL migration path and entrapped blobs distribution. The LNAPL-filled aperture follows a normal distribution, with the mean aperture ranging 0.253 mm to 0.287 mm, and the standard deviation around 0.13 mm. The characteristics of the entrapment blob morphology indicate that 80% of the individual blob areas are smaller than 20 mm 2 . The irregular structures of discrete blobs increase the 'LNAPL-water' interface, which will exacerbate contamination.

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Effect of Tween surfactant components for remediation of toluene-contaminated groundwater

Cited by 29 publications

References 18 publications

Characteristics and antioxidant activity of leaf essential oil–incorporated fish gelatin films as affected by surfactants

Characteristics and antioxidant activity of leaf essential oil–incorporated fish gelatin films as affected by surfactants

Biosurfactantes y su papel en la biorremediación de suelos contaminados con plaguicidas

The behaviors of LNAPL migration and entrapment in a rough-walled vertical fracture

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