Ecotoxicity assessment of experimental mixtures designed to rescue the territory adjoining to slurry storage of JSC ‘Rusal Achinsk’

The research objective was comparative as-sessment of ecotoxicity of soil cover adjacent in slurry storage of JSC „RUSAL Achinsk‟, the territo-ries and experimental mixes intended for sanitation. The research problems were the determination of the toxicity of the soils taken from several experi-mental sites by phytotesting method; carrying out comparative analysis of viability of test plants of initial soils and offered mixes. The researches were conducted on the basis of laboratory of Department of Ecology and Natural Sciences FSFEI HE "Kras-noyarsk State Agricultural University" in 2017 by standard techniques. As test cultures Lepidium sa-tivum L (garden cress), grade Entertainment, and Triticum vulgare L. (wheat soft summer) grade No-vosibirsk 29 were used. Studied test functions were germination energy, seeds viability, the length of sprouts and roots for the 10-th day after making the experiment. Ecotoxicity of soils was determined by average value of phytotoxicity index for both spe-cies of test plants. The calculations were carried out in all considered test functions. Received re-sults showed that all samples of soil without excep-tion made negative impact on studied test functions of plants. The greatest oppressing effect was noted in the samples from site No. 30. The distinction on the extent of response to the environment pollution between the species of test plants which resulted in the assessment of toxicity of soil according to the size IFT was established. The conclusion on the possibility of using experimentally prepared mixes for sanitation of the territory adjacent to slurry stor-age of JSC „RUSAL Achinsk‟ was drawn. Their ba-sis was made of the following components: silt from the bottom of pond cooler of exhaust waters of JSC „RUSAL Achinsk‟; sandy loam of overburden breed of production of sand in the floodplain of the Chulym River; silt from left-bank treatment facilities of Achinsk of 5-year period of storage.