Electrokinetic remediation of mercury-contaminated soils using iodine/iodide lixiviant

Article Abstract:

Various techniques have been developed to improve remediation of contaminated areas in the environment. One technique that has received increasing attention is the electrokinetic method for the remediation of contaminated soil and groundwater. The method employs electrolysis to remove metals from the contaminated areas by using lixiviant solutions that enhance the solubility of metals. Laboratory tests using the approach, with iodine/iodide as lixiviant, reveal 99% efficiency for removing mercury in mercury-contaminated soils.

Soil disinfection, Electrokinetics

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Kinetic aspects of surfactant solubilization of soil-bound polycyclic aromatic hydrocarbons

Article Abstract:

Increasing matrix diffusivities was the main factor behind the ability of nonionic polyoxyethylene (POE) surfactants to enhance release of polycyclic aromatic hydrocarbons (PAHs) from a weathered, coal tar-contaminated soil from a manufacturing gas plant site. A secondary factor was the increase in solubility by partitioning PAHs into the micellat pseudophase. These were gleaned from a study of the effect of POE surfactants on the solubilization rate of individual PAHs from the test soil.

Analysis, Polycyclic aromatic hydrocarbons, Chemical reaction, Rate of, Chemical kinetics, Solubility

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Micellar solubilization of polynuclear aromatic hydrocarbons in coal tar-contaminated soils

Article Abstract:

Existing linear partitioning theories were used to develop an equilibrium model to determine the extent of release of polynuclear aromatic hydrocarbons (PAHs) from a coal tar-contaminated soil from a manufactured gas plant site. The model accurately predicted solubilization of PAHs at low surfactant dosages, but failed to predict solubilization at high dosages.

Environmental aspects, Gas power plants, Polycyclic aromatic compounds

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