Removing Metals From Soil

by Keith W. Benker, Vice Pres. & Project Manager; Wenck Associates Inc., Maple Plain, MN,

Serial Information: Civil Engineering—ASCE, 1995, Vol. 65, Issue 10, Pg. 69-71

Document Type: Feature article

Abstract: Metals-contaminated soils have been among the most intractable hazardous-waste remediation problems. Conventional mitigation methods of capping, stabilization and landfilling all have serious limitations, and there has been no way to actually remove metals from soils--until now. In its first full-scale application in the U.S., an innovative treatment combining soil washing and soil leaching succeeded in removing lead from soils at the Twin Cities Army Ammunition Plant in Minnesota, as well as in reducing other metals to below health-risk levels. Completed last summer, the $9.5 million project could point the way to a permanent solution--at a cost comparable to traditional approaches--to the cleanup of metals-contaminated soils at foundries, platers, smelters, battery reclaimers, ordnance plants and other industrial sites across the U.S.

Subject Headings: Leaching | Metals (chemical) | Pollution | Remediation | Soil pollution | Soils | Washing |

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