Mercury-Contaminated Soil Remediation by Iodide and Electroreclamation
Publication: Journal of Environmental Engineering
Volume 129, Issue 5
Abstract
Mercury was removed from a field-contaminated soil by a combination of redox and complexation processes with iodide/iodine and electrokinetic mobilization. Iodide added to the cathode compartment was transported into the soil and oxidized to iodine near the anode. Mercury was mobilized and transported to the anode as a mercury–iodide complex. After 5 days, some 50% of the total mercury content had migrated to the anode compartment, and another 25% was recovered from the soil water in the vicinity of the anode. No volatile mercury was formed. Electromigration is the dominant transport process for the (charged) mercury–iodide complex, since electro-osmosis would have moved the mercury toward the cathode. The combination of iodide as complexing agent and an electric field for physical mobilization could be developed to a new method for in situ remediation of mercury contaminated soil.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 129 • Issue 5 • May 2003
Pages: 441 - 446
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Jun 22, 2001
Accepted: Jul 21, 2002
Published online: Apr 15, 2003
Published in print: May 2003
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