METHOD FOR RECULTIVATION OF SOILS CONTAMINATED WITH HEAVY METALS Russian patent published in 2023 - IPC B09C1/00 C05G3/80 C09K17/00 

FIELD: agriculture.

SUBSTANCE: invention relates to agriculture. The method for recultivation of soils contaminated with heavy metals consists in using a humic-mineral sorbent, loosening to a depth of at least 20 cm with simultaneous introduction of a sorbent into the soil, watering, and natural zeolite with a fraction of 3-5 mm with a clinoptilolite content of 75-80 is used as a sorbent. %, which is pre-modified with a chemical reagent, which is used as a 6% solution of acetic acid or a 3% solution of hydrochloric acid, settling is carried out for 3 hours, the precipitate is washed and dried to a moisture content of not more than 15%, after which it is mixed with a powdered humic preparation with the content of humic acids is 60-70% in a ratio of 1:30, they are applied at a dose of 130-160 g / kg of contaminated soil, the soil is moistened to a level of 70-80% moisture capacity 3-5 times during the reclamation period for 6-8 months.

EFFECT: invention makes it possible to introduce a zeolite-based humic-mineral sorbent (HMS) into contaminated soil during reclamation, and also makes it possible to reduce the content of heavy metals in the soil to MPC within 6-8 months.

1 cl, 3 tbl