The research of dust dispersed composition of urban environment

Abstract

Introduction. Presently, the atmosphere of urban environments needs protection due to excessive ambient air pollutant concentrations. Each year these concentrations go up, triggered by environmental factors and anthropogenic processes, such as industry, transport, housing and utilities infrastructure. Dust is one of the main ecological factors that have a negative impact on the air. The co-authors have analyzed theoretical regularities governing the fractional composition of dust in the urban atmosphere, field tested the air polluted by the atmospheric aerosol in urban areas, and studied the applicability of truncated normal distribution law to particle size distribution in the atmospheric aerosol. Materials and methods. The co-authors employed a set of conventional and advanced information collection and processing methods that enable researchers to deliver novelty-intensive results, including methods of dust particle size distribution assessment, experimental design, mathematical modeling, etc. The co-authors have benchmarked the earlier results against the findings of this research to identify their qualitative and quantitative compliance with the results published in independent sources. Results. The co-authors have found that integral curves describing dust particle distribution over equivalent diameters, constructed in the coordinate system of logarithmic probability, represent truncated normal distribution, derived from classical normal distribution by limiting the interval of possible variables for random values. These integral curves are an implementation of a random function where a random function parameter represents dparticle, um. Conclusions. Size distribution of dust particles is an important characteristic of air pollutions that can help to reduce concentration of the atmospheric aerosol in the air. Studies of dust particle size regularities, typical for an urban atmosphere, are particularly relevant because they contribute to the resolution of several problems of environmental safety in an urban environment.