Phytotoxicity of stale cyanidation wastes of polymetallic ores in areas of accumulated environmental damage

The results of studies of phytotoxicity of stale cyanidation wastes of gold-containing ores and adjacent soils on the territory of accumulated environmental damage are presented. It is established that they are viable for oats sown only in the upper part of the old dump, but the morphometric indicators of roots and sprouts show the effect of inhibition; mustard detects a fatal outcome in all samples. The soil environment showed inhibition of roots, especially mustard, but the sprouts were higher in mustard. The total weight of oat sprouts and roots exceeded that of mustard by 2-3 times. It is shown that stale dumps are life-sustaining, they contain life-sustaining toxobacteria that differ from soil inhabitants. The growth strategy of the bacterium is aimed at rapid reproduction of cells, but in the future they quickly lose their mobility and ability to reproduce. This limits their participation in the replenishment of the habitat with biogenic nitrogen and biologically active substances. In the studied waste and soils, a similar set of toxicants was present in an amount exceeding their Clarks in the earth's crust. To reduce phytotoxicity during the planning of dumps and chemical reclamation of the technogenic surface. This will increase the plant viability, sid-eration efficiency, accelerate the formation of biogenicity in the root layer, accelerate the blackening of the technogenic surface, and reduce the migration of ecotoxicants.