Assessment of air pollution by small-sized suspended particulate matter in urbanized territories with various technogenic load (on the example of Vladivostok, Russia)

摘要

The aim of the study was to estimate the pollution of the atmospheric surface layer by suspended particulate matter (SPM) in two districts of Vladivostok with different levels of technogenic load. Material and Methods — The air samples were taken in the "breathing zone" by an electric aspirator simultaneously to the liquid absorbing medium and on the filter, laser granulometry was used to assess the dispersion, and the mass concentration of the SPM fractions was calculated. Results — Ultrafine particles were detected in the air in the area with a high man-made load. Air levels of particles with an aerodynamic diameter of 0.1-1 μm, 1-2.5 μm (respirable fraction) and 2.5-10 μm (tracheobronchial fraction) were 5, 2.7 and 3.3 times higher, respectively, in the area with a high man-made load in comparison with the area with insignificant technogenic load. Conclusion — Particles with an aerodynamic diameter less than 10 μm, which have the most pathogenic effect, prevail in the air in the urbanized area with a high technogenic load. The predominance of SPM fractions with an aerodynamic diameter more than 10 μm is a characteristic feature of air pollution in the territory with a low man-made load.