The features of methanol conversion using silica gel adsorbents modified with alumina, the result of which is the formation of dimethyl ether, are considered. The conversion of methanol to dimethyl ether on modified silica gel was studied in experimental and industrial plants in a wide temperature range and at various gas supply flows. There were obtained the dependences of the degree of conversion of methanol to dimethyl ether on the temperature of catalysis on modified samples of silica gel, the distribution of absorbed components in industrial adsorption plant for drying natural gas.

Technical actions for decrease in harmful effects on the surrounding environment from the rotating furnaces of agglomeration of JSC RUSAL Achinskare offered. Additional technical solution on tertiary treatment of flue gases of the furnace of agglomeration in a scrubber electric precipitators and the direction of purified gases on repartition of carbonization of the aluminous shop is developed. the providing decrease in harmful emissions in the atmosphere to the level of maximum-permissible concentration. The carried-out trial tests of the offered technology confirmed that except effective purification of flue gases of furnaces of agglomeration of inorganic dust and carbon dioxide the high extent of decomposition of alyuminatny solution necessary for technology of receiving alumina is provided.

The emerging environmental problems of the cells with the Soderberg`s anode, associated with the lack of a vacuum alignment system in the subcaseous gas outlet network and an effective technological device for high-temperature oxidation of anode gases are considered. In order to increase the efficiency of high-temperature oxidation of harmful components of the anode gas, a compact burner with internal thermal insulation has been proposed, which is installed on the longitudinal side of the anode, which makes it possible to reduce CO emissions by 1.5 times. Considering the insufficient efficiency of the wet gas cleaning stage for sulfur dioxide, it is recommended to replace it with a dry adsorption gas cleaning using nepheline sludge as an adsorbent, which provides for sulfur dioxide trapping by 95–100 %.

The prospects of using of sorbents based on oxohydroxophosphate titanium(IV) to extract 134 Cs,137Cs and 90Sr from solutions close in composition to sea water have shown. The optimal conditions for the use of sorbents providing effective joint extraction of 134,137Cs and 90Sr in the presence of background macro components were determined. Modification of sorbents improves their sorption properties. It was established that the titanate ion exchangers are of interest for selective extraction of 90Sr. Optimum conditions of their application was defined. Heat treatment of waste sorbents provides reliable immobilization of radioactive sorbate. The titanium ortophosphate sorbents was tested for decontamination of liquid radioactive waste. The efficiency of their use is shown.

The advantages of using effective insulation materials from waste productions – burnt rocks and drill sludge based on liquid glass – are laid out. The compositions and the method of production for obtaining a porous filler have been developed, which is confirmed by patents of the Russian Federation. The use of waste materials – one of the most effective ways to save natural materials, with simultaneous utilization of byproducts and contributes to environmental protection.

The article investigated the compositions of road-building materials containing screenings of rock crushing, Portland cement, hydrolyzed lignin, modified by the stabilizing additive “Element”. The road-building compositions containing screenings of rock crushing, Portland cement, hydrolyzed lignin modified with the stabilizing additive "Element" were investigated. The optimal content of raw materials has been established, which allows to obtain soil-cements with a strength mark of at least M 60 - M 75. Using a model experiment, it was shown that the stabilizing additive “Element” is active and can interact with each of component of the raw materials. Using the methods of scanning electron microscopy, infrared spectroscopy, X-ray phase analysis, it has been experimentally shown that the processes of hydration, carbonization and increasing the connectivity of orthosilicate anions play a significant role in the structure formation of soil-cements.

The results of the development of a composition of a mixture based on low-plastic clay, which includes the waste of unplasticized polyvinyl chloride as some combustible additives, the cullet of common window glass as a flux-hardening additive and additionally containing boric acid as a flux, are presented. This composition allows you to comprehensively dispose of two types of consumption waste with obtaining high quality ceramic facing materials. In this case, waste of unplasticized polyvinyl chloride of any degree of purity and destruction can be used. Practical use of the developed composition allows you to expand the raw material base for the production of building ceramics, reduce the cost of products and reduce the environmental load from waste.

The efficiency of using original highly efficient vertical-axis wind turbines (VA wind turbines) based on N-Darya-Savonius combined rotors (KR) is substantiated for the national parks of southern Russia. Based on experimental studies, the power factor of the original combined rotor with blades having zigzag flaps was first obtained. The maximum values of the power factor of the CR reaches CP = 0.6 exceeding theoretically possible values for horizontal-axis wind power plants CP = 0.59. When working in a wind turbine, there are no emissions of pollutants into the atmosphere, oxygen consumption, thermal pollution, generation of infrasound and noise. VA wind turbines with a power of 1–10 kW, it is advisable to apply for the generation of electric and thermal energy in reserves and national parks.

Issues of new environmental risks and direct threats to the health and life of current living people with the advent of the post-industrial period of the fourth technological revolution and new forms of communication without borders and customs are examined. The global and liberal economy, according to world experts, has transformed into a "zombie economics of global post-truth." Such a transformation has given rise to a whole range of new environmental risks and threats for those living in the process of production and use of a wide range of goods and services. The various examples that have already manifested themselves in the current life of living people show the need for the formation of a twofold concept of sustainable development — resource-saving and biospheric — as its equivalent components. It is noted that the natural environment cannot change as quickly as the volume of innovations of the fourth technological revolution breaks into world politics and the economy. This increases the contradictions of the “zombie economics” and the global “post-truth” with the flora and fauna surrounding us, the billionth world of living organisms of the Earth’s biosphere, and expands the environmental risks and threats that are dangerous for our immediate descendants.

The efficiency of separate waste collection using street container-baskets for used bottles of polyethylene terephthalate (PET bottles) has been evaluated. The proportion of foreign objects in the flow of plastic bottles was determined and the composition of components mistakenly placed in the container was analyzed, which allows us to judge how the population relates to such systems and how effective the outreach is. The target stream of PET bottles was sorted by volume and color. The results obtained make it possible to evaluate the most popular type of PET bottles by size and color, which can be used to assess the possibilities of improving the collection system and technologies for further processing the resulting stream of PET bottles.

The results of studying the structure formation features of silicate bricks obtained with the use of solid waste produced by JSC "Berezniki soda plant" are presented in this article. Various samples, such as sludge from the "closed" sump with a moisture content of 5 %, sludge from the open sump surface with a moisture content of 35 %, moistened sludge from the open sump with a moisture content of 70 %, were taken from the sludge collectors for the research. It was established the building lime meeting the requirements of GOST 9179 can be received by means of heat treatment at 950 °C of the dehydrated slime selected from the closed settler. By results of silicate brick samples forming parameters and their structure optimization it was found that the use of lime from soda production solid waste as part of lime-silica autoclave hardening binder allows to obtain silicate bricks samples, characterized by the strength grade M200. Samples microstructure studies obtained using the methods of electron microscopic and x-ray phase analysis showed that silicate samples produced with the use of soda production waste are characterized by a cementing substance heterogeneous structure and an insufficient number of tobermorite group low-basic calcium hydrosilicates formed during autoclaving. This is due to the waste material composition, namely the presence of reactive-passive components and impurities. Increasing the structural strength of samples made with the use of soda production wastes is possible due to raising the lime-silica binder specific surface area and the binder modification with fine mineral additives.

The results of many years of stationary field experiments showing that a long-term severe deficit of potassium balance in agrocenosis leads to a significant deterioration of the potash condition of the soil. Systematic joint application of potassium, nitrogen and phosphorus fertilizers ensured the optimization of the soil's potash condition. It is shown that the assessment of the potassium state of the soil should be based on the integrated use of several diagnostic indicators.