Electrokinetic Remediation of Sand Contaminated with Copper and Chromium

摘要

The electrokinetic remediation of copper and chromium from artificially contaminated sand has been studied. In order to achieve higher remediation efficiencies Selective Cation Membrane and nylon mesh with filter paper membranes, pumping out and refilling of the conductive solution as well as anode system has been used in this study. All those methods help to prevent anions from the cathodic compartment from penetrating into the anodic and the soil system and do not allow to impair the remediation process. In addition, several anode system helps to reduce remediation time as at the same time to raise the efficiency of the overall remediation process. 10 laboratory experiments were conducted to remove copper (Ⅱ), chromium (Ⅲ) and chromium (Ⅵ) from the artificially contaminated lake sand. Obtained results show that efficiencies higher than 90% may be achieved.