The research results of mine atmosphere normalization in potash mines are given.The method of mine air purification from toxic gases through ozonation is proposed. The developed technology of using photochemical method of neutralization hydrogen sulfide and methylmercaptan in mine atmosphere is described. Tests of the developed technology of neutralization sulfur compounds are conducted in mines of Upper reaches of the Kama river’s deposit of potassium and magnesium salts and the results are presented in this article. It is found out that installation of high pressure arc mercury lamps AML-400 for ozone generation on mining excavation machines allows to reduce sulfur gases concentration in workspace up to the level of maximum permissible.

Ways to improve the efficiency of information-measuring and control systems for predicting and preventing accidental gas emissions into the atmosphere for gas distribution facilities are given. Implementation of the developed system in relation to gas reduction points and electrical protective installations is proposed.

Promising areas of application of pigments obtained on the basis of industrial wastes and containing a number of impurities are considered. The quality of the pigment obtained by the alternative technology from iron-containing sludge was evaluated in comparison with the red iron oxide pigments of the KA TU 2322-166-05011907-98 (Russia) and YIPIN S130 (China) grades. Quality indicators are stated and analyzed relative to the requirements of TU 2322-166-05011907-98. Primer GF-021 was analyzed for compliance with GOST 25129-82 and for the presence of anticorrosion properties by the potentiodynamic method and in the salt spray chamber. Pigments in the composition of fine-grained concrete were investigated for their coloring ability and effect on strength characteristics at the age of 1, 3, 7, 28 days. Deviations and competitive advantages of the pigment obtained by alternative technology are determined with respect to the standard both in the composition of the primer GF-021 and in the composition of painted fine-grained concrete.

The possibility of using activated carbons in wastewater treatment from aromatic nitrophenols and nitrosulfonic acids was investigated. The main parameters of the adsorption process that provide the maximum degree of purification are determined: the amount of activated carbon and the pH of mother solutions. The method of regeneration of the extracted activated carbon by treatment with sodium hydroxide solution was studied, the optimal conditions of extraction were determined.

Studies have been conducted on the effect of residual quantities of the most common herbicide Glyphosate (0.8; 1.4; 17) mg / kg of soil on the greens of peas and oats. Spectrophotometrically analyzed samples for their content of beta-carotene, which protects the cells of the immune system from damage by free radicals and can improve the immune system. The data obtained showed that the higher the content of herbicide in the soil, the less beta-carotene in samples of hay. The results of the experiments showed that the height of pea seedlings decreases when the soil is treated with Glyphosate. When the concentration of the herbicide is 1.4 mg / kg, it decreases by 32 % compared to the control; when selenium is added, the difference compared to untreated soil is 23 %. less than in the control sample. A sharp decrease in vitamin B2 and vitamin A in greens of peas grown in soil treated with Glyphosate is shown. The content of vitamins increases with the addition of selenium to the soil. The obtained experimental data indicate a decrease in beta-carotene, vitamins A and B2 in greens grown on soil containing Glyphosate.

Various options are considered for the processing of large-capacity waste of ethanolamines generated during long-term operation as absorbents in technological processes of carbon dioxide extraction from converted gas (from a mixture of CO₂ and hydrogen) in the production of ammonia type AM-76 and accumulation flue gas. Various innovative methods have been proposed for the disposal of spent mono- and methyldiethanolamines, which are in demand in various industries: in the process of urea condensation with a formaldehyde-containing product in the synthesis of adhesive and impregnating resins for woodworking, in the production of high-quality synthetic drying oils and substitutes for titanium white, in the manufacture of flame retardants and molding mixtures for metal structures and foundry molds in the metallurgical industry, when refining oil from hydrogen sulfide and mercaptans. This allowed us to solve the important environmental problem of the disposal of toxic waste, optimize the operation of a number of industries and reduce their environmental impact.

The method of cracking secondary synthetic polymers is considered, involving them into the production system as raw materials for producing bitumen-like materials, using this example as the most multi-tonnage ones – secondary plastics and used tires. Under conditions of high pressures and temperatures in an extrusion-type reactor, the formation of bitumen-like products for using in non- energy industries from synthetic polymer wastes is shown.

A technology has been developed and tested on an industrial scale for the restoration of disturbed lands contaminated with alkali-containing sludge waters. In the process of field research, the use of various neutralized soil neutralizers in the area adjacent to the alumina sludge storage facility was verified. Tests confirmed that the most effective neutralizer of alkaline soil is ammonium sulfate, which reduces the pH of the aqueous extract from 10,2 to 8,2 units. Using non-toxic technogenic materials, substrate compositions have been developed to restore the potentially fertile layer and the technology of ecological rehabilitation of disturbed lands for their subsequent use has been tested.

The possibility and efficiency of biflocсulation systems, including polymer electrolytes capable of interaction and polyelectrolyte complexes formation, usage in the processes of water treatment for the mineral particles separation, was studied. The influence of the nature, molecular weight of polyelectrolyte components and their ratio in the system on the efficiency and speed of the dispersed phase particles deposition process was considered. Sodium salt of carboxymethylcellulose, poly-N,N-dimethyl-N,N-diallylammonium chloride and polyanions and polycations polyacrylamide-based were used as polyelectrolytes. It was shown that application biflocсulation systems significantly increases the speed of the dispersed phase separation and allows to improve the clarification quality of the dispersion with a much lower (compared to monoflocculation systems) consumption of polymer electrolytes.

The issue of improving the environmental safety of locomotive-type diesel engines by using hydrogen is considered. The analysis of pollutants that pose a special danger to the atmosphere. To ensure reliable operation of locomotive-type diesel engine with hydrogen supply, an on-board system has been developed. To solve environmental problems in rail transport, the article provides experimental data on the assessment of the effect of hydrogen additives on the levels of emissions of harmful substances on the example of a diesel shunting diesel locomotive ChME3.

Analysis of the first results of adoption in RF since January 2019 of the new system of management of municipal solid waste (MSW) and comparison of them with the world experience has been performed, and it has been shown that the principal results supposed to be obtained in the next years, but, the authors believe, that the trends have been chosen correctly and it is possible to hope that the raised problems will be solved successfully. It has been shown that the proposed concept of the life cycles and etageres (whatnots) in the new system of management of MSW in RF does allow to optimize the practical steps, directed to realization of the zero landfilling "No landfills – no waste" principle. By this, due to the separate collecting of MSW, their additional sorting and using the modern technologies complex one can secure environmental safety of population and realize the principles of sustainable cyclic (circular) economy.

The dynamics of the impact of the largest airport of the Russian Federation "Sheremetyevo International Airport (IAS)" on the quality of the surrounding air environment is analyzed using an example. The most important sources of atmospheric impact located on the territory of OJSC "MASH" at present, and the dynamics of emissions for 2010–2018, as well as changes in their component composition are indicated. Analysis of the implementation of the environmental policy of this enterprise showed that it is generally quite effective. A key indicator confirming this efficiency is a noticeable decrease in total emissions per 1000 passengers served, which allows MASH OJSC not to increase its total emissions, despite the ever-increasing passenger flow.