A method for the one-stage pyrometallurgical processing of metallic radioactive waste (MRW) is proposed at the experimental melting unit MAGMA, which confirmed the feasibility of implementing the proposed technological scheme in semi-industrial conditions to produce deactivated metal suitable for economic use without restrictions. The methods of trapping and reliable conditioning of small amounts of secondary solid radioactive wastes are substantiated and tested. A pilot project for a one-stage decontamination of MPO in a melting unit "MAGMA-3" was implemented.

In article the analysis of technologies of an intensification of process of flotation of superficial drains is given in oil pumping stations. It is shown that the combination of reagent flotation to preliminary activation of reagents ultrasonic influence can be expedient for a process intensification. Comparison of constructional and technological parameters of floatation installations showed that for floatation cleaning of superficial drains at oil pumping stations, floatation cars of columned type possess a number of technological advantages.

The dynamic of the air pollution factors from industries are very different in Russian regions and in municipalities. In this study there are the main regularities of changes in industrial pollution emissions volume to the atmosphere. There were shown differences in the factors of atmospheric pollution influencing the structure formation and dynamics at the municipal and regional levels. It was demonstrated that the contrasts between individual industries, regions and municipalities in air emissions volumes in 2008–2016 gradually decreased faster than the industry average due to the faster pollution reduction in enterprises of oil production and metallurgy.

It is shown that at present the current system of environmental regulation in Russia is divorced from the real context in which to exist. One of the most promising areas for the use of waste production is ─ involving them recycled as secondary material or energy resources. On the basis of waste oil shale obtained heat-insulating materials with high physical-mechanical indicators. Due to the involvement of industrial waste in manufacturing of heat-insulating materials may dramatically change the parameters of the raw material base of Russia, which also contributes to reducing environmental impact in the regions. The use of waste fuel and energy complex: inter-shale clay and slate slag in the production of insulating materials contributes to recycling of industrial waste, the protection of the environment and expansion of raw materials base for production of ceramic building materials. The compositions of the developed compositions, proposed to obtain a lightweight brick and a porous filler, the authors of this article obtained three patents of the Russian Federation. Utilization of industrial wastes contributes to the development of "green" economy.

This paper presents the results of a study on the preparation of a sorbent for the liquidation of oil and oil product from the water surface spills based on soda production sludge, modified with organosilicon fluids. Based on the studies of physico-chemical, Toxicological properties and granulometric composition of sludge was determined that the most suitable for obtaining of a sorbent is waste a shelf life of 5 years and with a particle size less than 0.25 mm. As organosilicon modifiers is possible to use aqueous solutions "Aquasil" and "GKZh-11P" in the amount of 4–6 % by weight. The basic scheme of obtaining the modified sorbent and elimination of oil pollution from the surface of the water body is proposed.

A method is proposed for producing composite solutions using ash as a production waste, as a structuring additive to composite solutions. The chemical and mineral composition of ash is determined. Structuring in composite solutions was studied when cement was replaced by different amounts of ash. It is established that the possibility of a 20% replacement of cement with ash without loss of the technological parameters of the system. The environmental safety of the composite solution using ash modifier has been proved by determining phytotoxicity on seedlings of radish seed Raphanus sativus.

Compositions of artificial soils, including sand, clay, chalk, lime cake, by-products of wet magnetic separation, plant residues, sediment from silt detention pond in different proportions have been developed. Samples were examined in laboratory and field conditions. It is shown that climatic factors influence the course of soil processes. The main physicochemical properties of artificial soil and indicators of its fertility are determined. It was revealed that the samples of the obtained artificial soils can be recommended for further use in the restoration of technogenicdisturbed territories.

The results of research on the optimal conditions for obtaining a prolonged-action complex fertilizer from wastewater from woodworking enterprises are presented. The main active substance of the fertilizer is a nitrogen-containing insoluble polymer, obtained by polycondensation of urea-formaldehyde resin with urea. To produce the finished product, the resulting polymer is mixed with ash. It was found that the maximum yield of a prolonged-action complex fertilizer based on the urea-formaldehyde polymer is achieved under the following conditions: pH = 2,0, molar ratio of formaldehyde: urea 1,0: 1,5, reaction time 3,5–4,0 h. It is shown that the fertilizer obtained can be used in agriculture to improve the nitrogen, phosphorus and potassium nutrition of plants, as well as to reduce the intake of cesium 137 radionuclides into agricultural products.

The problems associated with the thermal utilization of droppings litter, which is formed at poultry farming facilities, are considered. The results of numerical studies for the biogas combustion method based on preliminary gasification of fuel are presented. A method for estimating the composition of thermal decomposition products based on the thermodynamic calculation of the chemical and phase equilibria is proposed. Calculated indicators of energy efficiency and environmental characteristics of combustion products are presented for a multi-zone combustion scheme.

Based on the system analysis using IDF0 diagrams, functional models of existing technical systems for cleaning used oil have been constructed. The influence of the parameters of the technological process on the time of its flow and the degree of purification of the used oil are described. After studying the influence of the parameters of the technological process of cleaning used oil and analyzing the existing automated technical oil purification systems, the necessity of developing a new automated technical system for cleaning the waste oil is substantiated, in which the parameters of the process that have not been considered previously will be monitored.

The problem of hydrocarbon pollution of the city soil is discussed. The soils of the big megalopolises are exposed to hydrocarbon pollution. The main part of pollution was caused by the precipitation and emissions of the transport. The soils which were picked from areas close to the busy highways and from the closest to living houses territories of the Moscow city were analyzed. We research the soils closed to Altufievskoe, Leningradskoe, Schelkovskoe and Enthuziastov highways and also closed to Leninskiy, Kutuzovskiy and Nahimovskiy avenues. According to the experimental data, the most hydrocarbon pollution were soils closed to Altufievskoe, Enthuziastov and Schelkovskoe highways and Kutuzovskiy avenue (more than 1000 mg/kg).