| 摘要 |
FIELD: agriculture. ^ SUBSTANCE: method includes mechanical removal of oil products from the ground surface by collecting oil over a layer of contaminated soil with further oil refining. Mechanical admixtures containing fuel oil residuals are sent for washing. After removing oil products, the depth of soil contamination is determined, thereafter contaminated soil is frozen at the temperatures below freezing point to the depths lower than the level of contamination. Frozen soil which is lower the level of contamination is withdrawn together with clean soil and taken out for washing. Washing of oil contamination is carried out by using cleaning fluid which contains 0.3-3.0% of surfactant aqueous solution at the temperature not less than 40C. Before washing, soil is fractioned into floating mass and deposited soil. Washing of floating mass is carried out by jet machining together with separating mass from contaminated cleaning aqueous solution. After washing, soil and/or separated mechanical admixtures are returned to the place of drawing, thereafter permanent grasses are sowed while adding mineral fertilizers, within two years woody plants and grasses are dressed with mineral fertilizers. ^ EFFECT: acceleration of ground reclamation together with impact reduction upon environment during land restoration. ^ 9 cl |
