An adsorption method for purification of gas emissions at industrial enterprises is proposed. Waste from the power industry – chemical water treatment sludge (CWO) of Naberezhnochelninskaya CHPP, formed during coagulation and liming of natural water was used as a sorption material. The chemical composition of the sludge and its technological characteristics are presented, an isotherm of the sulfur oxide adsorption by the modified sludge is constructed, its total pore volume, specific surface area and sorption capacity are determined. The calculation of the parameters of the modernization of the technological scheme for the purification of gas emissions from sulfur oxide of the line for the production of sodium bisulfite at JSC "Chemical Plant named after L.Ya. Karpov" is presented.

An improved scheme of physical and chemical wastewater treatment is considered. It is shown that the use of reagent flotation with final ultraviolet treatment as the basis for the physicochemical technology of wastewater treatment makes it possible to achieve the standard quality of treated wastewater, which allows it to be discharged into the sewer. In this case, the efficiency and dose of the reagents used are of great importance. Recommendations for the use of the proposed technology are formulated.

The possibilities of using the experience in the development and testing of the chemical-technological process of reverse osmosis regeneration of sanitary wastewater for the space station aimed at the organization of circulating water supply to industrial enterprises and in everyday life are considered. The high efficiency of sanitary wastewater regeneration with a purification selectivity of up to 99.7 %, a degree of water isolation of 97–98 % and compliance of the purified water quality with standard requirements has been experimentally confirmed. The features of reverse osmosis separation of mixtures of low-molecular-weight organic substances in a laminar flow regime in the apparatus are considered. It is proposed to calculate the performance of reverse osmosis equipment using the analogy between mass transfer and heat transfer, the applicability of which has been confirmed experimentally. An empirical relationship and a method for calculating the performance of reverse osmosis equipment are proposed. The data obtained can be scaled up to industrial production and provide an increase in the degree of closeness of the circulating water supply for a wide range of industrial enterprises, special-purpose facilities, in transport and in everyday life.

The technology of mapping of environmental risks during the transfer and transformation of pollutants emitted into the atmosphere of the city by stationary facilities is considered. The technology is implemented on the example of the pollution of the air basin of the city of Almaty with sulfur dioxide SO₂ by heat power enterprises. The calculations were made using the WRF-Chem model, previously adjusted to the city atmosphere by parametrizing of microphysical processes and comparing them with observational data at meteorological stations in the city and the surrounding area. Risk maps were constructed according to a variety of impurity concentrations for various meteorological conditions. The following risk measures were used: the mathematical expectation with the exclusion of unlikely bursts of high concentrations (less than 1%) and the recurrence of cases of exceeding of the maximum one-time MPC. The technology can serve as the basis of an information and analytical system for solving of various tasks concerning location of enterprises and the analysis of plans for air protection measures.

The results of modeling of the interaction of the fine fraction of loparite ore mill tailings (-0.071 mm) with solutions simulating soil waters, with different contents of organic carbon, are presented. It was found that the introduction of dissolved organic matter intensifies the process of transition of rare and non-ferrous metals into soluble forms. At the same time, the concentrations of pollutants in solutions after five hours of interaction exceed the maximum permissible concentrations for the objects of commercial fishing importance several times. Phytotesting method determined that, in contrast to the general sample of mill tailings, the water extract of the fine fraction has a toxic effect on the growth and development of higher plants. The research results indicate the environmental hazard of the fine fraction of the loparite ore mill tailings due to the ingress of mineral particles into the soil and their interaction with soil waters.

The possibility of obtaining an asphalt-concrete mixture with the use of large-tonnage wastes from machine-building industries – galvanic sludge – has been studied. The properties of the mineral filler have been studied. The main structural characteristics of the obtained asphalt concrete samples were presented.

Presented coagulation-flucular-absorption method of wastewater treatment of complex composition with the help of a composite reagent. The efficiency of cleaning reaches 97–98 %.

The work analyzes the origin and differentiation of alkanes in the productive water layer of open areas of the eastern part of the Black Sea. In the studied water area, 300 water samples was taken from five horizons (surface, thermocline layer, 25, 50 and 100 m) in different seasons of 2015. The determination of the total and individual content of anthropogenic and biogenic hydrocarbons was carry out by chromatography methods. The research results were systematize according to four main types of distribution of hydrocarbons in the water column. The data obtained suggest that in the open waters of the eastern part of the Black Sea hydrocarbons were of marine biogenic origin. The natural origin of hydrocarbons in the Black Sea can be explained by significant volumes of gas emissions from mud volcanoes, gas fountains and seeps, as well as the release of hydrocarbons from bottom sediments, the presence of constantly renewable biomasses of bacteria that oxidize methane and produce hydrogen sulfide, as well as the functioning of biota in the oxygen zone of the sea.

A systematic analysis of the past 35-year period of development of the country's agro-industrial complex shows that there has been an intensification of the production of grain and other products of the industry. The contribution of various ecological and economic factors to this process is estimated. It is proved that its material and resource basis is the accumulated, and not yet replenished, soil fertility-a stock of organic matter( humus), macro-and microelements of mineral nutrition of plants, a set of modes and parameters that allow for the production process and form the yield of cultivated crops (marketable products). Reproduction of soil fertility can be achieved only through technologies that include the assessment and adjustment of expenditure and input items of the balance of elements of mineral nutrition of plants in agrocenoses. It is shown that if the current approach is maintained, the limits of the growth of the agricultural sector of the economy will be determined by the annually decreasing potential of the fertility of arable soils, the degradation of which increases every year.

A method for the conductometric determination of the double dilution coefficients according to the results of monthly measurements during the year of the specific electrical conductivity of undiluted and twice diluted underground water from 4 springs is presented. The first coefficient characterizes the ratio of mono- and bivalent cations and anions in the water under study, the second — the content of dissolved salts, which is necessary to establish the hydrochemical type of the investigated waters. The static and dynamic approach to the interpretation of the results obtained makes it possible to assess the stability over time of the mineral composition of the investigated spring waters. The technique is classified as environmentally friendly, since natural diluted distilled water serves as waste.

An assessment of the ecotoxicity of Cu nanoparticles and CuO was carried out on biological indicators of soil condition as the central biogeochemical link of terrestrial ecosystems. They studied soils that differ significantly in the properties that determine their resistance to pollution by heavy metals: common chernozem, seropesky and brown forest soil. Contamination with Cu and CuO nanoparticles led to a deterioration in the biological properties of soils. There was a significant decrease in all the biological indicators studied. No reliable cases of gormesis were recorded. Nanoparticles of CuO of copper showed big ecotoxicity, than CuO microparticles. According to the degree of resistance to contamination with Cu nanoparticles, the studied soils formed the following series: common chernozem > brown forest soils > seropesky. The light particle size distribution of seropescus and the acidic reaction of the environment of brown forest soils, as well as the low content of organic matter in these soils, contribute to the high mobility, and therefore high ecotoxicity, of copper in these soils. CuO nanoparticles affected the biological state of common chernozem to a lesser extent than Cu nanoparticles.

The trends in the development of the shadow sector of waste processing of electronic and electrical products are considered. The features of handling the smuggling of electronic waste to developing countries are analyzed. The main methods of countering the illegal circulation of waste electronic devices and promising ways to prevent illegal exports of decommissioned electronic and electrical devices are highlighted.