Abstract
A special place in air pollution with dust emissions is occupied by the production of building materials, using large quantities of dispersed mineral substances as aggregates. The article is devoted to the study of hazardous dust fractions emission when assessing the dustiness of the working area for the production of concrete and reinforced concrete products, since the specific location and operation of the equipment complex is characterized by uneven dust formation in space and time. This reduces the efficiency of the aspiration systems. Based on the analysis of methods and means for assessing dustiness, the use of the gravimetric method is justified, however, to assess the content of the most dangerous dust particles for the human body with a size of 2.5 to 10 microns, a size separation of particles is required. Non-woven synthetic filter materials of various thick-nesses and densities are investigated. It is proposed to carry out sampling in blocks with three filters from different filter materials. The studies were carried out with the help of a specially made portable complex. The most effective filter materials were determined with the help of microscopic analysis. The conducted calibration of the blower performance with an assessment of the measurement accuracy showed relatively small errors in the air sampling, which confirms the feasibility of assessing the dustiness of the filter blocks.
Highlights
One of the most important natural factors of human activity is atmospheric air, which affects life on the planet
It was found that particles up to 20 microns in size are best retained by FT-350 (G4) material
Unlike the FT-350, it has a lower dust capacity, which will require limiting the time of air sampling
Summary
One of the most important natural factors of human activity is atmospheric air, which affects life on the planet. Air pollution by highly dispersed solid particles is caused by natural and man-made processes [1,2]. Air currents lift small particles from the surface of the earth and transport them over vast distances (pinkish dust from the Sahara colors snow even in the mountains of Central America), and small salt crystals from the surface of the oceans. The constantly increasing rates of development and growth of production are accompanied by the intensive use of atmospheric air and, its pollution. Dust formation is a very common hazardous and harmful industrial aspect, which causes a great environmental risk to the health of millions of people [3,4]
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