The Electrokinetic Treatment of Polluted Soil by Hydrocarbon: From Laboratory to Field

Pérez-Corona, M.; Plank, Zsuzsanna; Bustos, Erika

doi:10.5772/64631

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…By heating the soil, the thermal desorption technique decomposes the volatile contaminants and collects them for treatment. It is primarily utilized for restoring biological substances (10).…”

Section: Physical Maintenancementioning

confidence: 99%

Remediation Technology for the Restoration of Polluted Soil

Rahman

2022

Sci Insights

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One of the most serious environmental issues is soil pollution. With the increase in contaminated sites, how to safely and effectively remediate these contaminated soils has become an urgent environmental problem in our country. This paper summarizes the most commonly used remediation technologies and research progress for contaminated soil in the United States and abroad, including physical remediation, chemical remediation, and bioremediation. Each repair technique has advantages and disadvantages. To get around the problems with a single method and make the most of the benefits of different remediation technologies, it was suggested that research and development of comprehensive remediation technologies for contaminated soils be stepped up.

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Section: Physical Maintenancementioning

confidence: 99%

Remediation Technology for the Restoration of Polluted Soil

Rahman

2022

Sci Insights

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“…Note that depending on the spatial distribution of the contaminants, it would also be possible to use a single metal electrode, and an array of injectable electrodes around it. This type of arrangement was previously proposed, for studies conducted using metal electrodes …”

Section: Introductionmentioning

confidence: 99%

Zein-Bonded Graphene and Biosurfactants Enable the Electrokinetic Clean-Up of Hydrocarbons

et al. 2021

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Nonaqueous phase liquids (NAPL, e.g., hydrocarbons and chlorinated compounds) are common groundwater pollutants. Electrokinetic remediation of NAPLs uses electric fields to draw them toward electrodes and remove them from groundwater. The treatment requires NAPL mobility. Emulsification increases mobility, but at a risk for downstream receptors. We propose using alkaline aqueous solutions of zein and graphene nanoparticles (GNP) to form conductive materials, which could also act as barriers to control NAPL migration. Alkaline zein−GNP solutions can be injected in the polluted soil and solidified by neutralizing the pH (e.g., with glacial acetic acid, GAA). Shear rheology experiments showed that zein−GNP composites were cohesive, and voltammetry showed that GNP increased electrical conductivity of zein-based materials by 3.5 times. Gas chromatography−mass spectroscopy (GC−MS) demonstrated that the electrokinetic treatment of model sandy aquifers yielded >60% and ∼47% removal of emulsified toluene in freshwater and in salt solutions, respectively (with 30 min treatment using a 10 V differential voltage between a zein−GNP and an aluminum electrode. NaCl was used as model salt contaminant. The conductivity of surfactant solutions was lower in saline water than in freshwater, explaining differences in toluene removal. Toluene−water emulsions were stabilized using the natural surfactants lecithin and saponin. These surfactants acted synergistically in stabilizing emulsions in either freshwater or salt solutions. Lecithin and saponin likely interacted at toluene−water interfaces, as indicated by the morphology, interfacial tension and compressional rigidity of toluene−water interfaces with both components (relative to interfaces of either lecithin or saponin alone). The compressional behavior of interfacial films was well-described by the Marczak model. Electrokinetic treatment of saturated model sandy aquifers also decreased the turbidity of emulsions of water and either tricholoroethylene (TCE, by ∼41%) or diesel (by ∼75%), in the presence of a bacterial biosurfactant. This decrease was used as semiquantitative indicator of NAPL removal from water.

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Combined Use of Remediation Technologies with Electrokinetics

Gomes

Bustos

2021

Electrokinetic Remediation for Environmental Security and Sustainability

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The Electrokinetic Treatment of Polluted Soil by Hydrocarbon: From Laboratory to Field

Cited by 4 publications

References 15 publications

Remediation Technology for the Restoration of Polluted Soil

Remediation Technology for the Restoration of Polluted Soil

Zein-Bonded Graphene and Biosurfactants Enable the Electrokinetic Clean-Up of Hydrocarbons

Combined Use of Remediation Technologies with Electrokinetics

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