PROCESS OF RECULTIVATION OF SOILS CONTAMINATED WITH RADIO NUCLIDES Russian patent published in 1995 - IPC

FIELD: agriculture. SUBSTANCE: process relates to recultivation of soils contaminated with toxic or radio active substances. Boreholes are drilled in soil, powerful vibrations are excited within range of 60-1500 Hz in combination with pumping of softening solutions into soil. Then frequency of vibration action equal to inherent vibration of soil is used together with pumping of zeolite with addition of 5-10% of binder into soil. Three layers of zeolite which absorb radio nuclides and prevent leak of radio active fluids into rivers, lakes and underground waters are formed up to water-carrying layer. Layer of zeolite is created at levels 1.5-2.0 m above water-carrying layer, 2.0-2.5 m from surface level of soil and at level of contaminated surface layer of soil. When pumping zeolite solution soil is exposed to vibrations with frequency equal to that of solution pumping. EFFECT: prevention of leaks of fluids into environment. 9 cl, 3 dwg