METHOD FOR REMEDIATION OF LAND CONTAMINATED WITH PETROLEUM AND PETROLEUM PRODUCTS Russian patent published in 2008 - IPC B09C1/08 

FIELD: chemistry.

SUBSTANCE: method implies simultaneous soil fertilization with nitrogen fertilizers, phosphorous phertilizers, natural highly-porous ameliorant aluminosilicate mineral, followed by mulching to a depth of 25-30 cm. Fertilizer quantity is calculated according to the following formula: D=Naz Kaz, where D - starting quantity of nitrogen fertilizer, kg/ha; Naz - coefficient of soil nitrogen-fixing microorganisms response to introduction of petroleum products and ameliorant aluminosilicate mineral; Kaz - calculation factor for a particular type of soil, which is 20 for dark-grey soil, 6 for peaty loamy sand, and 55 for sod-podzol midloamy soil. Simultaneously with nitrogen and phosphorous fertilizers and ameliorant aluminosilicate mineral, or immediately prior to revegetation, potassic fertilizer is introduced in amount of 50-250 kg/ha. Non-ammonia nitrogen fertilizers (potassium saltpeter or lime saltpeter) and/or slow-release organic fertilizer are used as nitrogen sources.

EFFECT: decrease in soil phytotoxicity, while degree of soil purification is reached.

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