METHOD OF DECONTAMINATING BLACK EARTH SOILS CONTAMINATED BY HEAVY METALS Russian patent published in 2013 - IPC B09C1/00 A01B79/02 

FIELD: process engineering.

SUBSTANCE: invention relates to agriculture and reclamation. Proposed method comprises using stimulatory substance representing an organomineral compost prepared by mixing phosphogypsum, elementary superphosphate and KPC compost at the their following ratio subject to alkaline metal concentration in wt %: phosphogypsum - 10.0-15.0, elementary superphosphate - 0.8-1.0, KPC compost making the rest. Said compost is introduced in soil one time for 4-5 years in amount of 100-110 t/hec with content of organic substance of up to 20% and pH 6.0-6.5 to reduce alkalinity of black earth soil to 7.2-7.8 followed by placement of compost by cultivator to the depth of 20-25 cm.

EFFECT: simplified and accelerated reclaiming of soil contaminated with heavy metals.

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