Electrokinetic removal of phenanthrene from fine-grained soil.
The electrokinetic remediation of fine-grained soil contaminated with PAH is investigated, using model soil with one representative component, phenanthrene. Nonionic surfactant and iso-propanol are used as solubilizing agents. When applying aq. surfactant solns., the overall partition coeff. (Kd) is suitable for predicting the leaching and thereby the efficiency of the remediation. For alc./water mixts., the leaching is less depending on the soil constitution, and the energy consumption is considerably decreased compared to pure water or surfactant solns. The degree of removal is above 90%. Soil contg. addnl. heavy metal ions, like Cd, can be cleaned by the same procedure.
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