Problems of protection of urban ambient air pollution from industrial dust emissions

Abstract

Abstract. The development of large cities accompanied by the development of the industry hashistorically led to the fact that now residential areas are located side by side with the industrial production. For instance, exactly this situation has developed in the city of Volgograd, as well as in other Russian cities, where sometimes the distance from large enterprises to a living area is 100 m or less. In addition, small-scale entrepreneurs usually place their production directly in their past places of residence. As a result, the content of harmful substances in the air of city blocks is much higher than the standards of hygiene require. It is obvious that the current situation can be improved through the use of modern, more advanced technologies. However, increasing the efficiency of air systems to protect the city from pollution and industrial emissions is an urgent task. The authors propose a version of the system layout, designed to reduce dust emissions in urban air.

On the evaluation of storage facilities on the dustiness of the urban environment

“…where C -total dust concentration in researched point, mg/m 3 , PM2,5 and PM10 -concentration of dust with the size less than 2,5 m and 10 m, accordingly, mg/m 3 , F (d)-integral distribution function of particles by equivalent diameter, %, d = equivalent particle diameter [9] For determination of dispersal composition and characteristics of dust in the air of storage facilities, the microscopy method was used [10][11][12]. In this regard, was conducted the dust analysis, sampled in the atmosphere from the storages for three types of the materials.…”

Fine dust atmospheric pollution from the objects of infill construction

“…The highest concentration of this type of dust is observed at the level of 11-15 floors. The building up of the residential high-rise complexes, with a large number of objects (usually each residential complex consists of 10 residential buildings), requires environmental monitoring of dust pollution near residential houses and buildings under construction [10].…”

“…Moreover, the space of conjugate functions φ* contains the elements of the necessary smoothness that satisfy the following conditions for their components: Further, we write equation (10) in an exploded form: Let we make the definition of the vector function p j . To this end, we first assume that the source of dust pollution with the j-th dust component f j is a delta function of coordinates, i.e. )…”

Determination methodology of the subsidence speed of small-dispersed particles of different ranges of storage facilities by visual recording

“…Currently, in a number of countries, including Russia, determined the content in the atmospheric air of particles with the size of not more than 2.5 μm (PM2.5) and not more than 10 μm (PM10), because dust particles of ultra-dispersal size is the most dangerous, these particles can infiltrate into the human lungs. A system for monitoring and evaluating the concentration and composition of small sized particles in storage facilities is currently absent, which does not allow an objective evaluation of the dust impact on the quality of the working environment and air emissions [1][2][3][4].…”