The possibility of neutralizing gas emissions from nitrogen oxides by a peat-alkaline sorbent containing as an alkaline component ash from the incineration of sunflower husks is considered. Spent peat-alkaline sorbent is expedient for use in the development of composting mixtures together with the waste of brewing industry – spent grains and excess active sludge of treatment facilities, while the range of optimal compositions of composting mixtures (% by mass) is limited: waste sorbent – 20–60; spent activated sludge – 20–50; spent grains – 20–40. The content of components of composting mixtures was determined by the simplex lattice method. The results are presented in the form of Gibbs concentration triangles, for which a complex of physicochemical parameters (water-soluble substances, calcium and magnesium cations, soil acidity, nitrates according to Grandval-Lajoux) will have the best values for the growth of agricultural plants.

In work options of preliminary handling of active silt with its subsequent use as a bioflokulyant are considered. It is shown that efficiency of use of active silt increases using its preliminary handling allowing to give active silt in the condensed type and also by its activation with addition of reagents. Examples of a floatation condensation of active silt by a floatation method and with use of the chemical reagents having properties of coagulants and flokulyant are given. The received results give the chance to recommend options of reagent and floatation handling of active silt before use it as a flokulyant. In this case volume expenses of use of active silt as a bioflokulyant by 1,5–3 times are cut down.

The prospects of the possible application of cable power lines with high-temperature superconductors for energy transmission over long distances are analyzed. Based on the technical and economic analysis, the areas of the preferred application of conventional transmission lines and superconducting transmission lines are established, depending on the ratio of transmitted power and distance. It is established that the prospect of using HTSC conductors for energy transmission over long distances is quite realistic, and also that the ratio of the cost of HTSC cable to the usual can be reduced from 100 to 5–6. The authors have identified a field of possible application of high-voltage superconducting cables for the transmission of energy over long distances.

The possibilities of using domestic reverse-osmosis modules for the organization of circulating water supply and return to the cycle of the target product at low-tonnage chemical plants, as well as the application of these modules in self-contained dwellings, are considered. The selectivity of membranes was compared with the separation of aqueous solutions of multicomponent mixtures containing polar and nonpolar substances. The character of the dependences of the selectivity of membranes on the concentration of dissolved substances in the initial solution during the separation of multicomponent mixtures was studied. The possibility of achieving a clean water recovery ratio (the degree of closure of the circuit) is shown to be 96.5%. Schematic diagrams of circulating water supply systems intended for extraction of components lost with wastewater at small-scale industrial enterprises and for sewage treatment of sanitary-hygienic waters with the purpose of their further return to the production cycle, utilization or neutralization are proposed.

The main problems of extraction of colloidal gold and pollutants from waste, including pulps and solutions, using chemical recovery methods are considered. It has been proposed to use electro sorption in the disposal of waste containing colloidal gold. At the same time, the choice, the preparation of the ion-exchange sorbent and the necessary parameters of voltage and current are of great practical importance.

The results of studies on the extraction efficiency of zinc, copper, nickel, lead and cadmium ions by BAU-A, BAU-K and C-VERAD adsorbents are presented. From heavy metals, simulated wastewater was purified. The selectivity of adsorbents with respect to the heavy metals studied is shown. The results of the work can be used in the purification of inorganic industrial wastewater.

Properties of such "active" shells as edible film materials have been studied. The basis of these coatings are natural polymers - polysaccharides, which can be represented by sodium alginate. Edible films based on natural polymers have a high sorption ability and, when ingested, adsorb and remove metal ions, radionuclides and other harmful substances from the human body. The organoleptic properties, structure, water-absorbing capacity, strength characteristics of double edible films based on apple puree, with inclusion of sodium alginate in one of the layers were studied. Five samples of a film with various kinds of plasticizers were made. It is established that all the films obtained possess good digestibility by the organism due to the content of completely natural components.

The porous characteristics and chemical state of the surface of coals AG-OB-1, AG-5, SKD-515, differing in the production method and properties are determined. A complex study of the adsorption of dimethylformamide on active charcoal (equilibrium, kinetics, dynamics, simulation) was carried out. Specific features, characteristics and mechanism of adsorption of dimethylformamide from aqueous solutions with industrial active coals have been established. The characteristics of equilibrium adsorption, the limiting stage and the mass transfer coefficient are determined. The parameters of the adsorption column and the regime of continuous purification are calculated. Optimization of the process was carried out. On the basis of experimental and theoretical studies, a technology for wastewater treatment from dimethylformamide has been developed, which provides resources saving and environmental protection.

The results of a comparative analysis of the distribution of the components of the Bratsk (BrAZ), Irkutsk (IrkAZ), Sayanogorsk (SAZ) and Krasnoyarsk (KrAZ) aluminum components emissions from the air onto the snow cover are presented. It was found that the dependence of the decrease in the concentration of fluorine, sodium and lithium in the snow cover with distance from these industries is exponential. The same course of changes in the concentrations of Al, F, Ca, Mg, Li, Si, As, Zn, Sr, Sb in the snow water filtrate in the KrAZ, BrAZ and IrkAZ emissions zones was established. This course of concentration changes differs from that of the same elements in the background region. Based on the calculation of the element enrichment coefficient in the solid sediment of the snow cover, the anthropogenic origin of Zn, As, Sb in the region of influence of BrAZ and KrAZ emissions is shown. Based on the calculation of the element enrichment factor in snow water, the natural origin of Zn, As, Sb in snow water is shown in the area of impact of BrAZ and KrAZ emissions (from 1 km to 5–7 km). It is suggested to reduce fluoride emissions in the source by using lithium additives in the electrolyte. To reduce the emission distribution range, it is suggested to precipitate the aerosols included in the emissions within a radius chosen based on the exponential dependence of the deposition, and also to apply the approaches of ecological landscaping and improvement of the industrial territory.

A simplified target approach to the analysis of data in environmental management based on the theory of order statistics is proposed. Its prospects were demonstrated when solving typical problems of researching the content of pollutants in natural waters of the industrial region. It is shown that the proposed approach is not only simple and demonstrative, but also allows to obtain a result with increased reliability in comparison with classical methods of data analysis.

A critical analysis of the concept of "Best Available Technologies" was carried out. Technology is always a set of interrelated methods. Only the designer decides what methods this complex is composed of. Accepted criteria of referring to BAT contribute to administrative voluntarism, stagnation of domestic scientific developments, appreciation of domestic scientific developments and environmental measures.