The methods of natural and forced supply and removal of gases in arrays of heterophase wastes of various nature used in controlled gas-contact detoxification technologies are considered. The classification of the main parameters of the waste is divided into groups – mechanical, filtration, temperature, chemical and biological. Based on the analysis of the parameters, generalized criteria for determining the scope of application of gas-contact technologies are proposed. The implementation of gas flow control technology is described, an example of which are complexes biothermal treatment of oil-contaminated soils. The main element of this complex is the combined aeration system, which is necessary to increase the rate of biochemical decomposition of hardly decomposable hydrocarbons in oil waste. The results of the experiment conducted in the framework of the calculation and design of the aeration system due to the insufficiency of the initial data are presented. Shown the need to create a general theoretical model of controlled gas flows in porous, water-saturated, hard plastic media, both in natural conditions and under the action of an artificial pressure drop.

The article describes the developed and patented in the Kabardino-Balkar State Agrarian University named after V.M. Kokov and in the Kabardino-Balkar State University H.M. Berbekova new ways of fixing anti-erosion and anti-landslide structures with the help of anchor systems (Know-how). The theory and methodological recommendations on their calculation and design are presented. Possible options for the practical application of wire anchor systems in mountain areas and in environmental management are given: for fixing anti-erosion and antilandslide structures; sloping fastenings of dams; anti-mercury ways to protect high-voltage lines; in agriculture.

A method for the thermal processing of solid municipal waste (SMW) and the Magma unit for its implementation has been developed and patented. The article describes the construction and the method of SMW thermal processing. The results of SMW thermal processing tests on various types of waste are given. It is established that in the developed furnace it is possible to process all types of waste, turning them into either electricity or gas, which after effective purification is released into the atmosphere or into slag that can be used in the construction of roads.

The issues of reducing emissions of harmful substances by power facilities of railway transport are considered. It is established self-consistent railroad engines are the main source of environmental problems associated with the emission of pollutants. The main directions for the environmental safety of self-consistent railroad engines under operating conditions are given. Based on the results of the research conducted and the calculations of the cumulative indicator of the exhaust emissions of self-consistent railroad engines, it was found that the use of natural gas as a fuel is the most promising for solving environmental problems.

The results of research on the creation of biodegradable polymer films using porous materials of various chemical nature - porous aluminosilicate microspheres extracted from fly ash formed during the combustion of coal and porous oxidized coal, which are pre-saturated with sugar solutions, are presented. Laboratory technology is based on a hot-mix of two films, between which a filler pre-impregnated with a solution of sugar was previously placed. The proposed technology for obtaining biodegradable films involves the use of industrial devices, such as an extruder, calender, etc. With the help of field tests, a sharp decrease in the time of their destruction under natural conditions due to the activation of soil bacteria capable of destroying polymer compositions has been proved. A version of the industrial technology of accelerated destruction of used films by the microbiological method at special test sites is proposed.

The study of the effectiveness of the use of iron (III) sulfate (Ferix-3) in the treatment of natural water. Experimental studies of the effectiveness of this reagent in various conditions: the dosage of coagulant, alkalization of water, the dose and grade of flocculant, the temperature of the treated water. Optimal results were obtained with a dosage of coagulant of 30–70 mg/l, the parameters of water meet the requirements. The content of suspended substances in the supernatant layer does not exceed 30 mg/l with a duration time of clarification of 30 minutes or more. The practicality of coagulation treatment with the use of modern reagent based on ferix-3 ferric iron has been substantiated.

The results of studies on the production of ceramic material, which can be used for face veneer and pedestals are presented. This material was obtained on the basis of stiff clay with the addition of 30 % by weight of unsorted container glass breakage as a flux-hardening additive, which forms a vitreous phase during baking, and 2.5 % by weight of a fluxing agent that increases the amount of the vitreous phase and lowers the temperature of the liquid-phase sintering material. In turn, the vitreous phase acts as a binder in the bulk of the material due to the vitrification of the surface of the ceramic particles and their connection into a strong frame and creates the effect of self-glazing products. Studies have been conducted showing that the highest compressive strength and the lowest water absorption of the material being developed were obtained using boric acid as a fluxing agent and baking at a maximum burning temperature of 1050 °C.

The results of long-term environmental monitoring of the condition of Scotch pine and Siberian spruce, planted on stackings of the Borodinsky coal mine, are presented. The height of pines and spruces at the age of 11-14 years has been established, and the influence of the main technological factors on this indicator has been investigated. The dependences of the height of trees on the composition of rocks laid in the upper layer of the waste dump are presented.

It is studied and revealed sources of bivalent manganese in technological waters of soda production. It is established that a source of this component are raw materials - limestone and with increase in depth of development of breed the content of compounds of manganese increases. The further research on a technological chain of solid waste of soda production and observation wells in close proximity to sludge collectors has shown that the content of compounds of manganese doesn't exceed a natural background. Purification of technological waters of ions of manganese was carried out with use of reagents: potassium permanganate; sodium sulfide; suspension of weak limy milk. For purification of technological waters of ions of bivalent manganese suspension of weak limy milk is offered, at the same time cleaning of this component for 99,9 % is reached.

Extraction of metals from polymetallic raw materials is carried out by leaching with hydrochloric acid solution, then metals are precipitated from hydrochloric acid solutions with ammonia, the NH₄Cl salt is crystallized from the solution, and the separate preparation of gaseous basic (NH₃) and acid (HCl) reagents is performed by the interaction of (NH₄)₂SO₄ and NH₄Cl salts. The process of extraction of metals occurs in a closed production without release of environmentally hazardous components into the environment.

The models, methods, as well as the results of the justification of measures to reduce greenhouse gases (GHG) emissions by the transport complex for the period up to 2030 to improve its environmental safety, as well as assessing the effectiveness of measures (the use of seasonal cooling devices (SOA) – heat stabilizers) are considered transport infrastructure facilities (TIFs) of road, rail, air and water transport when implementing different climate change scenarios in the areas of permafrost. For sections of roads and railways (in the embankment), runways of airfields in the territories examined in the next 30 years, high climatic risks that require the use of heat stabilizers are not forecasted. For these objects can be applied less costly protective measures. The pile foundation of bridges and other transportation facilities can be sufficiently effectively protected by heat stabilizers from the effects of climate change. In relation to the strip and raft foundations of port facilities, other production facilities in the territories examined, the use of the SOA is a very effective measure to reduce climate risks. An increase in the expected effectiveness of measures to adapt them in the case of transition from continuous permafrost to its island and rare island species has been established for all types of TIFs. The reduced efficiency of the use of heat stabilizers in soils of low humidity, especially in sandy soils for all types of TIFs, was recorded.

Timely development of standards for soil quality is a prerequisite for environmental management. In Russia, the content in the soil of chemical elements (CE) is insufficiently studied, which is one of the reasons for the small number of developed not only maximum permissible, but also approximately permissible concentrations of CE in the soil. To solve the problem of rationing soil quality in Russia, the experience of such countries as Holland, Finland, Canada, and Germany can be adapted to domestic realities. So, to justify the production and economic standards, Finnish guideline values and Dutch intervention levels can be used; for soil assessment of playgrounds and residential areas – trigger levels of Germany, for residential and park areas and farmland – the relevant Canadian standards.

Considered the most frequently used sources of autonomous water supply of a country house – manhole and well. It is shown that the chemical composition of natural water in these structures does not meet the requirements of SaNPiN 2.1.4.1175-02 and varies over time. The reasons for the change in the water quality in the manhole and the well and the ways to solve the problem are listed. The factors affecting the water quality in the manhole and the well are indicated – the characteristic of the water of the aquifer and the arrangement of the structures. The conclusion was made that it is impossible to make the optimal choice between a manhole or a well for the environmentally acceptable water supply of a country house for the quality of water in each of the water intakes. A comparative assessment of the manhole and the well is given for a number of indicators in order to optimize the choice between them.