The article considers the requirements of regulatory documents to ensure fire safety during construction and operation of gas distribution pipelines in Russia and China. The different approach to fire risk reduction in the two countries is revealed: more specific and stringent requirements in China and general requirements related to fire hazardous facilities in Russia.

Keywords: fire risks, fire regulations, natural gas combustion, causes of natural gas fires, natural gas transportation, fire safety

Results of field tests of mobile dust meters of the AirExpert series based on optical sensors (OPC-R1 / OPC-N3) at the stationary air monitoring station "Shabolovka" State Environmental Budgetary Institution (GPBU) "Mosekomonitoring", Moscow, equipped with a dust analyzer (TEOM) series 1405 , showed that the measurement accuracy meets the requirements for instruments for measuring the quality of atmospheric air in populated areas. Mapping of atmospheric air pollution in certain areas of the cities of Obninsk, Dubna, St. Petersburg, Kursk, Moscow, Volgograd (2019-2024) was carried out, which made it possible to quickly assess the environmental situation in the study area in real time, thereby detailing the data from stationary monitoring posts.

Keywords: mobile dust meters, monitoring, reference device, measurement accuracy, pollution mapping, hyperlocal monitoring

The capture and disposal of harmful emissions is an urgent task of our time. This article describes various methods of improving the environmental friendliness of industrial enterprises by cleaning flue gases. The most promising purification technology is adsorption. Therefore, the paper presents laboratory studies of the testing of some adsorption materials for the efficiency of carbon dioxide capture. The key formulas of sorption purification methods are displayed, and the results are presented. Based on experimental studies, an adsorption material was selected that has a potentially high absorption efficiency after activation and refinement of a composition that can be regenerated.

Keywords: flue gases, adsorption, absorption, carbon dioxide, greenhouse effect, sorption materials, absorption efficiency

Industrial enterprises place high demands on the quality of demineralized water, the economic feasibility of this process, as well as its environmental friendliness. The water treatment plant begins with pre-treatment, which allows the removal of dissolved suspensions, mechanical impurities and organic substances. Most often, the pre-cleaning process is organized using clarifiers. The type of clarifier used significantly affects both the efficiency of the process and its economic characteristics. The paper presents a comparative characteristic of the operation of vertical cylindrical clarifiers of the Central Research Institute, VTI and high-speed clarifiers with a pulsating column. The main operational characteristics are highlighted, and the cost of clarified water is calculated when using different types of clarifiers.

Keywords: clarifier, pre-cleaning, cleaning quality indicators, thermal power plants

The effect of organomodified silica particles on the extraction of dissolved diesel fuel from water was studied. The dependence of the efficiency of water purification on the concentration and type of solid particles, as well as the concentration and type of surfactant, is shown. When using a short-chain surfactant to modify the surface of silica particles, the minimum residual concentration of diesel fuel was 2.71 mg/l at a concentration of 4% Aerosil-380 and hexylamine 57 mmol/l. Replacing the short-chain surfactant hexylamine with the long-chain CTAMB led to an 8% improvement in the quality of water purification due to an increase in the surface activity of the organic cation. The use of modified clay particles to purify water from diesel fuel showed lower efficiency compared to Aerosil-380 particles at similar concentrations of the solid phase and surfactant modifier.

Keywords: Pickering foam, foam emulsion, diesel fuel, water purification, silica, cationic surfactant, hexylamine, cetyltrimethylammonium bromide

Reducing the loss of thermal energy in heating systems and increasing their reliability is an urgent task for the thermal power industry. The use of polyurethane foam insulation of pipelines is currently considered as the most promising solution to this problem. However, the construction of a durable and economical pipeline with PU insulation requires certain conditions. Despite the advantages of using PU insulation, the experience of implementing such pipelines has revealed problems arising from emergency situations that directly affect the reduction of energy efficiency. To solve these problems, an operational remote control system is being introduced to eliminate accidents and monitor insulation moisture. The paper presents an analysis of the implementation of LoRaWAN-based SDCs on heating networks in the Republic of Tatarstan. The study shows that in the first year of operation, the number of defects was higher due to the establishment of an information collection system and the installation of sensors. However, the second year of the experiment demonstrated a decrease in the number of defects and accidents, which indicates an increase in the efficiency of the system. It is recommended to introduce pipelines with PU insulation and SOD to increase the reliability and efficiency of heating networks.

Keywords: pipelines, heating networks, polyurethane foam insulation, reliability, durability, energy efficiency, operational remote control system

Main tacks of ecology are determine the safety margin of the planet; Identify the parameters that have the greatest impact on the state of the world; Predict the likely outcomes of current economic and industrial policies. Professor  Gaia Herrington concludes that the “standard scenario” is most comparable to the current situation. This has led to the creation of numerous (over 1,500) inventions to reduce environmental threats.   Chemists at the New Jersey Institute of Technology have created a new laboratory method to detect traces of PFAS in food packaging, water and soil sample. Most existing models of the terrestrial biosphere that are used to estimate carbon sequestration account only partially or not at all for the complex mechanisms associated with vegetation, and are at the lower end of the complexity spectrum.

Keywords: environmental threats, limits to growth, inventions on ecology

The subject of the research in the article is the system of solid municipal waste management, the choice of a method of sorting and recycling waste to obtain finished products based on the material balance method. For the analysis of production systems, the material balance method is proposed, which allows you to estimate the quantity (mass) waste involved in sorting, processing and receiving finished products and the amount of finished products received at each of the above stages of the waste management system. One of such indicators may be the coefficient of effective waste processing Ƞ (KEPO) in the production of new consumer goods (similar to the coefficient of efficiency), taking into account the economic cycle for the processing of MSW, including the collection, sorting, recycling of waste and the production of new goods in one economic cycle, and the coefficient of waste generation µ (KOO) in the same business cycle, determined by the method of material balance.

Keywords: municipal waste, sorting, recycling, products, material balance, coefficient of effective waste recycling, coefficient of waste generation