The paper presents the experimental results with a combined electric arc method for processing rubber waste to produce gases and solids from them. The paper reveals the peculiarity of the applied approach which lies in its effectiveness in the formation of an autonomous gas environment of carbon monoxide and carbon dioxide, which were mainly generated during combustion of an arc discharge in an open air. The optimal operating modes of the arc reactor were identified to ensure an increase in the yield of combustible gases during thermal conversion with the addition of water to the reaction zone. The operating parameters of the arc reactor for processing rubber products to produce graphite-like material with the carbon content of up to 96.7% by weight were clarified.

The effects of the main technological parameters, such as pressure, temperature of the separated solution on the process of ultrafiltration and reverse osmosis during the purification of artesian waters from iron and manganese compounds are considered.It was found that the use of ultrafiltration for pre-treatment and subsequent reverse osmosis is an effective way to obtain drinking water quality. The optimal technological diagram of artesian water treatment plants is shown.

The paper presents the results of environment safety assessment of Russian and foreign binding reagents (Syntex-65, Lukoil DD 3000, Voltes PP-300 and Dustbind) used for remediation of objects of accumulated environmental damage in the Murmansk region. The paper shows that in the presence of anti-erosion and water-retentive phytocenosis on technosoil of loparite ore tailings, these reagents have a partial inhibitory effect on the first first seedlings of timothy grass (Phleum pratense L.) and red fescue (Festuca rubra L.) and statistically (p <0.005) affect its main quality indicators (plant height and biomass). Effective methods of applying reagents to the dusty surface of technosoil were identified. When using the Lukoil DD 3000 reagent as an analogue of Dustbin – continuous, for Voltes PP-300 – fragmentary, when using Syntex-65 – continuous in the mode of simulated hydroseeding.

A mathematical model of methane filtration to a well in the body of a municipal solid waste (MSW) landfill during degassing has been developed. The identity of the obtained calculation results using the empirical model with the results of field measurements at the landfills reclaimed by the authors in the Moscow region was noted. It has been confirmed that the mathematical model tested in practice and the results of its numerical study make it possible to predict the process of landfill degassing over time at the design stage, as well as during operation and after its reclamation. It is concluded that forecasts of methane emissions from the body of the landfill into the atmosphere serve as the basis for the development of technologies and equipment to ensure environmental sanitary and fire safety of the territory in the area where the MSW landfill is located, as well as urban planning plans for the development of settlements.

The volumes and various types of waste generated in the construction industry were analyzed. The paper outlines the main methods for processing brick waste, as one of the most common construction waste. The article presents the results of experimental studies of the developed compositions of blends based on slaked lime, brick chips, quartz sand, gypsum, diatomite and clay. It was concluded that on the basis of the studied raw materials, it is possible to synthesise composite materials with a strength up to 6.3 MPa with the content of lime and brick crumbs up to 35 and 19 % respectively.

Отмечена целесообразность использования методов, основанных на проведении интегральной оценки, отражающей уровень экологической безопасности водохозяйственных объектов. Разработан подход по определению интегрального показателя, характеризующего уровень экологической безопасности последних. Проведена апробация данного способа на примере прудов р. Малый Салгир, расположенных в городской зоне. Выполнены оценка фактической обстановки и ранжирование этих водохозяйственных объектов по приоритету реализации действий, направленных на повышение их уровня экологической безопасности при эксплуатации.

The content of PM_2.5 and PM₁₀ in the air at the Dalpribor enterprise in Vladivostok (Russian Federation) was studied. The distribution of galvanic aerosol particles in the area adjacent to the enterprise was studied. The highest concentrations of PM_2.5 and PM₁₀ particles were recorded inside the electroplating shop. A significant contribution (exceeding 10 %) of electroplating enterprises to the overall urban air pollution was revealed. It was emphasized that, in general, the measured average concentration of PM_2.5 and PM₁₀ particles does not exceed the MAC values.

An analysis of existing methodological approaches to assessing the life cycle of hydrogen was carried out to determine the level of impact of hydrogen technologies on the environment, including an assessment of their carbon footprint. The features of determining the boundaries of the system, functional unit and other aspects of life cycle assessment are presented. Taking into account the specifics of the fuel and energy complex of the Russian Federation, the carbon footprint of hydrogen was assessed using 5 technologies: steam reforming of natural gas (methane), water electrolysis, gasification of coal and biomass, methane pyrolysis. The results indicate the fundamental importance of the method of electricity production in the comparative assessment of hydrogen production technologies.

The issues of financing environmental protection activities are considered and the relevance of this topic is emphasized in the light of assessing its effectiveness using the example of Russia. An econometric study was conducted based on the volume of investment in capital for environmental protection and the values of key environmental indicators using the method of regression analysis. The lack of sufficient connection between investments and environmental indicators was revealed. A conclusion was made about the need for more comprehensive research, as well as the advisability of using systemic measures, including non-financial ones, to improve environmental activities.

The agrochemical, sanitary-hygienic and toxicological properties of compost soil from solid waste (technosoil) when mixed with soddy-podzolic soil were studied. Observations of soil overgrowth and changes in chemical and toxicological properties were carried out over two years. It was confirmed that the studied soil was fertile, suitable for growing plants, conform to the requirements of sanitary and hygienic standards of the toxicity category “Pure” (hazard class V) and acceptable for unlimited use in accordance with the recommendations of Appendix 1 of SanPiN 2.1. 7.1287-03. It was concluded that the proven technology for obtaining soil is cost-effective and possible for using the high biological potential of composts when landscaping infertile areas of anthropogenically disturbed landscapes.