The effect of hydrophobic fine particles on the foam flushing remediation process

Oliveira, Roberto Carlos Goncalves de; Oliveira, José Farias de; Moudgil, Brij M.

doi:10.1007/b97119

Cited by 7 publications

(5 citation statements)

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“…Foams have been investigated for soil remediation due to the fact that they can improve the contact between the surfactant and the soil contaminant and reduce the interfacial tension between NAPL and the aqueous phase [5,6]. In addition, foams may serve as carriers for nutrients and oxygen, which would be essential in a further bioremediation step [7,8].…”

Section: Introductionmentioning

confidence: 99%

Remediation of sandy soils using surfactant solutions and foams

Couto

Massarani

Biscaia

et al. 2009

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Remediation of sandy soils using surfactant solutions and foams

Couto

Massarani

Biscaia

et al. 2009

Journal of Hazardous Materials

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“…Also it was found that the hydrophobic silica nanoparticles tend to adsorb efficiently and thus made the foam much more stable. Higher the foam stability, higher was the oil removal efficiency from contaminated soil as mentioned in literature [26].…”

Section: Soil Remediation Studymentioning

confidence: 83%

Remediation of Diesel Contaminated Soil by Tween-20 Foam Stabilized by Silica Nanoparticles

Karthick¹

2017

IJCEA

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Abstract-Diesel oil spills into soil from petroleum storage areas, pipelines are a major environmental hazard. There is thus an increasing demand for new, efficient agents for remediation of diesel contaminated soil. The aim of this study therefore was to analyze the efficiency of application of nanoparticle stabilized nonionic surfactant foams for remediation of diesel contaminated soil. Stable foams were produced from dispersions of hydrophilic, hydrophobic silica nanoparticles with nonionic surfactant Tween-20. The foam generated was then transferred to a column containing the contaminated soil. The maximum diesel oil removal efficiency obtained by applying Tween-20 foam stabilized with 0.5 wt% hydrophobic silica nanoparticle was 78%-much higher than that obtained for Tween-20 foam stabilized with 0.5 wt% hydrophilic silica nanoparticles. The Tween-20 surfactant solution alone showed only 42% maximum oil removal efficiency.

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“…Also it was found that the hydrophobic silica nanoparticles made the foam much more stable. Greater the foam stability, higher was the oil removal efficiency from contaminated soil …”

Section: Resultsmentioning

confidence: 99%

Characterization and Application of Surfactant Foams Produced from Ethanol‐Sodium Lauryl Sulfate‐Silica Nanoparticle Mixture for Soil Remediation

Karthick¹

2017

Macromolecular Symposia

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Soils contaminated with diesel oil spilling from industrial areas, pipelines constitute a major environmental problem. This subsequently leads to the contamination of groundwater as well. Hence recently there is an increasing trend of usage of better techniques and agents that can perform diesel oil contaminated soil remediation with greater efficiency. The aim of this study is to report the potential, efficiency of using silica nanoparticle stabilized anionic surfactant foams for diesel contaminated soil remediation and also the different characteristics of the foam produced. Also comparison in terms of soil remediation efficiency using surfactant dispersions only were performed. The foams were produced from dispersions comprising of ethanol, anionic surfactant sodium lauryl sulfate (SLS) and silica nanoparticles, both hydrophobic and hydrophilic. The foamability and stability of the different foams were determined using the Dynamic Foam Analyzer DFA 100 (Kruss GmbH, Germany). The surfactant foams generated were then applied to the contaminated soil using a fabricated column. The results showed the gradual stabilization of the SLS foams by the use of the silica nanoparticles. The maximum diesel oil removal efficiency obtained by applying foam stabilized with 0.3 wt% hydrophobic silica nanoparticle, 10 vol% ethanol, 0.1 vol% SLS was 94.5%. The 0.3 wt% hydrophobic silica nanoparticle, 10 vol% ethanol, 0.1 vol% SLS surfactant solution showed only 61.5% maximum oil removal efficiency.

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The effect of hydrophobic fine particles on the foam flushing remediation process

Cited by 7 publications

References 0 publications

Remediation of sandy soils using surfactant solutions and foams

Remediation of sandy soils using surfactant solutions and foams

Remediation of Diesel Contaminated Soil by Tween-20 Foam Stabilized by Silica Nanoparticles

Characterization and Application of Surfactant Foams Produced from Ethanol‐Sodium Lauryl Sulfate‐Silica Nanoparticle Mixture for Soil Remediation

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