Skuldelev

In low permeability soils (clays and silts), conventional hydraulic-based amendment techniques often fail to achieve appropriate amendment distribution. Electrokinetic (EK) enhanced amendment delivery is an innovative approach that uses electromigration and electro-osmosis to uniformly migrate amendments through clays and silts, since these transport mechanisms are not substantially affected by soil permeability. EK mechanisms can be applied to distribute electron donors, electron acceptors and/or bacteria for in situ bioremediation (EK-Bio), or oxidants for in situ chemical oxidation (EK-ISCO).The near-surface geology throughout much of Denmark consists of glacial clay till, which poses a significant challenge to remediation of contaminated sites. Facing this challenge, the Capital Region of Denmark retained the team of Geosyntec, NIRAS, and the U.S. Army Engineer Research and Development Center (ERDC) to design and execute the world's first field application of EK-Bio to remediate a tetrachloroethene (PCE) source in clay.