The carbothermal coreduction of zinc and iron oxides in pellets from a mixture of blast-furnace sludge and steelmaking dust was studied. The physicochemical regularities were studied with the establishment of the optimal parameters of carbothermal reduction. Bench tests were carried out to determine the main modes of operation for the processing of zinc-bearing dusts of metallurgical production with the justification of the criteria for choosing an installation for these purposes. Standard operating procedure and know-how were developed to obtain pellets from zinc-bearing dusts and recover the zinc and iron for reuse.

The article discusses a method for containing an accidental of oil and oil products spill on the surface water using booms barriers. The activities carried out during the diesel fuel spill containment at the thermal power plant-3 of Norilsk Thermal power plant JSC are described. To contain oil spills in water bodies near the territory of thermal power plant-3 of Norilsk Thermal power plant JSC, a scheme with two protective lines was proposed to increase the efficiency of work, as well as reduce contamination and damage to the environment and the economic costs of containment.

The possibilities of using the main wastes of brewing, products of their modification and processing into coals as adsorbents for the purification of natural and waste waters are considered.

As dust-suppressing compositions, aqueous solutions of polyvinyl alcohol with the addition of a surfactant - an anionic surfactant and a plasticizer based on higher fatty alcohols were proposed. A comparative analysis vs. existing modern compositions for dust suppression was performed with consideration to the technical conditions. The physicochemical and operational properties of dust-suppressing compositions were studied: chilling point, viscosity, density, dust-binding properties, swelling of tires of dump trucks and other mining equipment. It was established that the developed agent effectively binds dust. When modeling, it was confirmed that the wind load on the dusty material treated with the reagent, when using it, meets the hygienic standards for dust content in the air and its amount does not exceed 2 mg/m³. Conclusion – the use of this tool in the summer is advisable.

The diagnostic ratios and methods of application for determining the sources of polycyclic aromatic compounds (PACs) associated with various technological processes were studied. Several additional methods were studied to improve the reliability in PAC source identification.

A sorbent was proposed, obtained from sludge from the water treatment section of a thermal power plant for wastewater purification from iron, copper and nickel ions. A method for obtaining a sorbent from sludge, its composition and properties were described. The results of studies of the efficiency of wastewater treatment with a sorbent on model solutions and industrial wastewater from the plant were presented. It was established that the purification efficiency of model solutions depends on the initial concentration and for copper ions it is in the range from 40 to 95 %, for iron ions in the range from 30 to 95 %, for nickel ions in the range from 70 to 100 %, and for industrial wastewater, the efficiency of purification from the same elements ranges from 60 to 80 %. The proposed sorbent is recommended for use in the initial stages of wastewater treatment with a high content of copper, nickel and iron.

Assessments and comparative analysis of the negative environmental impact of objects (Negative impact on the environment) of various types of economic activities, I and II impact categories, on the vegetation cover with the data of remote sensing of the Earth were carried out. It was found that objects of category I in general cause more damage to vegetation than objects of category II, and the results correlate with data of the environmental impact of objects included in the state register of objects with Negative impact on the environment.

The main technological and environmental parameters of lands disturbed during open-pit mining of coal deposits with a total area of 49,614 hectares according to satellite imagery were identified. Recommendations for reforestation of dumps with an area of 31,362 hectares are substantiated, taking into account individual natural, climatic and floristic features of specific areas where quarries are located in Siberia between the 51st and 69th parallels of the northern hemisphere of the Earth, as well as for carrying out the mining and forest engineering stage of dump reclamation.

The possibilities of using methods and data of remote sensing (optical and radar) to investigate cases of oil leaks and spills in the coastal zone of the Black Sea considered.

The results of research on the justification of projects for the integrated industrial development of mineral deposits, including the extraction of placer gold from man-made raw materials, the reclamation of disturbed lands as a result of past economic activity, the elimination of objects of accumulated environmental damage in the Russian Arctic, taking into account economic, environmental and social factors, are presented. ESG-instruments for financing investment projects are proposed, including the use of "green" bonds, funds within the framework of capital repatriation and compensation fund funds. A procedure has been developed for selecting such priority projects at the Kular deposit in the Ust-Yansky district of the Republic of Sakha (Yakutia) and their financing schemes.

The problems of the environmental safety strategy implementation are considered. It is emphasized that the most important goals of environmental safety should be the protection of human life, health and living conditions. The differences in environmental hazard assessment using MPC (maximum permissible concentrations) and risk assessment are analyzed. It is proved that the methodology of risk assessment allows much better interpretation of the results of environmental analysis, and can become a useful tool for decision makers.