The article considers examples of atmospheric air monitoring in linear and compact cities. The issues of atmospheric air pollution are considered, examples of components of pollutants coming from stationary and mobile sources are given. The analysis of the monitoring system of cities with different urban planning is carried out.
Keywords: linear city, compact city, highway, pollution, monitoring, monitoring posts, motor transport, gas pollution, exhaust gases
Noise pollution of the air is considered to be an excess of the natural level of the background noise or a sharp fluctuation and change in such sound characteristics as the frequency of the sound wave and the strength of the sound stream. The article considers noise levels in the mainline territories in a linear city.
Keywords: linear city, traffic noise, highways, air environment, landscaping, equivalent noise level, row of planting, arboretum composition
The article considers the concentration dependence of dust particles PM2.5 and PM10 on a curb stone on a number of influencing parameters. According to the data of field measurements, a quadratic regression equation was compiled, according to which the factors that have the greatest influence on the spread of fine dust near the roadway were determined. The results of mathematical processing of experimental data are presented in the form of a graph of the confidence area of the observed and predicted values constructed using the STATISTICA software product.
Keywords: PM10, PM2.5, fine dust, roadway, linear city, concentration dependence
The forecast of fine dust pollution, the organization of monitoring and quality control of the air environment are relevant for cities with a developed transport infrastructure. The article checks the application of the distribution law for the concentration of fine dust PM2.5 and PM10 for highways of urban, district and local significance, the sample size was 50 values.
Keywords: linear city, distribution law, fine dust, roads, mixed gaussian distribution
The article deals with the distribution of fine dust in the atmospheric air of roadside areas of cities with a linear configuration, factors affecting its concentration in the roadside area.
Keywords: fine dust, roadside areas, road transport, wind speed, meteorological parameters
The article raises an urgent problem for large cities - the fight against the negative consequences of road transport. The importance of urban planning measures to reduce the accumulation of emissions, as well as green spaces to reduce the concentration of dust content of harmful substances in urban areas is considered. The data of CO concentration near the mainline territories in 95 studied points were analyzed.
Keywords: road transport, dust, gas-protected green areas, leaves, green spaces
The article considers the content of dust particles in the filter of the split system of a residential building and in the air of an air-conditioned room, the material is taken, as well as its analysis for the content of fine dust.
Keywords: fine dust, residential air conditioning system, bacteria, integral distribution functions, "dissection"method
In publication overflows and leaks of oil products are considered on petrol filling stations. The materials used to collect overflows and leaks of oil products on petrol filling stations are indicated. Disadvantages of sand and properties of silica clay are considered. The petroleum was used for carrying experiments to collecting of oil products by sand and silica clay. The experiments were carried out and the data on changes in the mass of petroleum remaining on the samples (particles of silica clay, particles of sand) from initial mass of the samples (before contact with petroleum) were received. The assumption was made about the possibility of using silica clay instead of sand to collect overflows and leaks of oil products in urban environment.
Keywords: overflows, leaks, oil products, petrol filling station, sand, silica clay, urban environment
Based on the results of theoretical and experimental studies, the necessity of taking into account the “overshoot effect of large particles” in inertial devices with small diameters is justified when assembling dust collection systems with devices of different sizes.
Keywords: vortex inertial dust collector with counter-swirling flows (CTF), suction from the bunker, differently polluted flows, aerodynamic resistance, overshoot
In article metallurgical production as the metallurgy is one of the main sources of technogenic environmental pollution and a working zone is considered. Authors have described the main sources of formation of fine dust by results of which the analysis of fractional structure of the dust particles which are allocated during the operation of the arc melting furnace has been carried out. The submitted data demonstrate that the dust coming to rooms of the shop has the sizes from 3 to 18 microns. The share of mass of particles with sizes less than 10 microns in air of the electrosteel-smelting shop makes from 15%.
Keywords: fine dust, disperse analysis, sources of formation of dust, steel-smelting furnace, metallurgical dust