Process of treating contaminated soils

Details Process of treating contaminated soils Process of treating contaminated soils

B - Operations, Transporting

03

D

B03D 1/008 (2006.01) B03D 1/006 (2006.01) B03D 1/02 (2006.01) B08B 3/08 (2006.01) B09C 1/02 (2006.01)

Patent

CA 2057224

ABSTRACT Contaminated soils are treated in that an aqueous slurry of the soil is separated into a coarse fraction and a fine fraction, the fine fraction is subjected to flotation, the resulting froth is dewatered and then carried away as a pollutant concentrate, and the underflow from the flotation is dewatered and is then carried away as purified soil. An emulsified oily vegetable oil is used as a collector agent for the selective flotation or an emulsified light mineral oil is used as a collector agent for the selective flotation and a light mineral oil is stirred as a conditioning agent into the fine fraction before it is subjected to the selective flotation.

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