Process for removing metal contaminants from soils

Details Process for removing metal contaminants from soils Process for removing metal contaminants from soils

1993-04-26

1997-02-04

Lander, Ferris

Chemistry: fertilizers

Processes and products

134 2, 588236, C05G 304, A62D 300

Patent

active

055993729

ABSTRACT:
A multi-step process for treating soil that has become contaminated with heavy metals is disclosed. The process may be conducted on the site where contaminated soil is present and allows replacement of the original contaminated soil with decontaminated soil, thus avoiding the need to transport contaminated soil. The contaminated soil is separated and analyzed to determine which soil fractions contain metal contaminants, further processed to isolate the contaminants and treated with oxidizing agents. The contaminating metals are removed from the soil mixture by chelation. Decontaminated soil is replaced at the site and the metals that are removed from the soil are recovered and recycled.

REFERENCES:
patent: 5342449 (1994-08-01), Holbein et al.
"Innovative Electromembrane Process . . . Soils", Krishnon et al, pp. 1-21, Aug. 1, 1988.

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