FIELD: environmental methods. SUBSTANCE: material, in particular sand, gravel, soil, oil gravel, asphalt, and drill fines, is cleaned to remove such impurities as crude oil, heavy metals, etc. For that, sorption agent is mixed with material to extract appropriate impurity, which is further separated from sorption agent by density and particle size by feeding gas flow in such a way as to take away sorption agent in the form of separate fraction. EFFECT: enhanced cleaning efficiency. 14 cl, 4 ex
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