Electroosmotic removal of gasoline hydrocarbons and TCE from clay

Article Abstract:

The effectiveness of electroosmosis (EO) in removing hydrocarbons from clay was tested. Contaminated clay was packed in a laboratory soil column and current was introduced in the apparatus. Samples were taken after the EO treatment and results showed that longer EO treatment periods result in less contaminants in the soil column. It was also observed that decontamination begins at the anode and progresses towards the cathode. A distribution coefficient K(sub d) was determined applicable in computing potential hydrocarbon mobility under EO conditions.

Hydrocarbons, Trichloroethylene

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Electroosmotic contaminant-removal processes

Article Abstract:

The effectiveness of electroosmosis (EO) to remove contaminants in water involves consideraton of factors such as time, soil moisture content, voltage gradient, pH values, pore water salinity and the kinds of electrodes used. Results show that this method allows decontamination regardless of depth or location, that saturated soil behaves as a chemical cell with induced current, and that nitrogen is effective in EO transport.

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Modeling of soil venting processes to remediate unsaturated soils

Article Abstract:

Soil venting is one technique to deal with organic chemical contaminantion. Air is passed through the soil and becomes saturated with the contaminant. This process changes the temperature of soil continuously until either an equilibrium condition is reached or the contaminant has evaporated. An alternative is introduction of heat in the air flow to hasten evaporation depending on chemical properties of the contaminant.

Models, Soil aeration

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