Method for decontaminating soils

Details Method for decontaminating soils Method for decontaminating soils

1990-04-30

1992-03-17

Dawson, Robert A.

Liquid purification or separation

Processes

Chemical treatment

210749, 210908, 210909, 210925, 423DIG20, 405128, 2082625, C02F 168, C22B 700

Patent

active

050966006

ABSTRACT:
A method for substantially degrading and detoxifying soils contaminated with haloorganic compounds is shown. The method comprises contacting a soil, sediment, or sludge containing less that 5% by weight of a haloorganic contaminant, with a reagent of the formula MX, where M is a metal selected from the group consisting of K, Na, Ca, Zn, Mg, Ba, Pb, and X is hydroxide, carbonate, oxide, or acetate. The contact and subsequent reaction is carried out under conditions which insure the phase compatibility of the haloorganic contaminant and the reagent, and preferably under anhydrous conditions. The contact is carried out for a time sufficient to effect the dehalogenation of at least 90% of the contaminant.

REFERENCES:
patent: 4327027 (1982-04-01), Howard et al.
patent: 4447262 (1984-05-01), Gay et al.

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