ИСТИНА

We compared the chemical composition of ash and slag waste from three large power plants in the Central Russia. Alkaline fusion was used to determine the total element composition. Trace elements were determined by treatment with nitric acid and a mixture of nitric and hydrofluoric acids under pressure in PTFE autoclaves. The mobile element species were measured using various extracts used for similar purposes in soil science (water, hot water, HCl, ammonium acetate buffer). The fractional composition of the samples was determined by the method of dry dispersion (8 fractions) and obtained preparative amounts of fractions, which were further analyzed. To simulate the conditions of actual interaction with the soil, ash and slag ash waste samples were mixed with sod-podzolic soil and chernozem in different ratios and incubated for two months at 20–22 ° C and 60% of full water capacity.