10.24411/1816-1863-2019-11029

Environmental Safety Construction and Town Economy

STUDY OF ECOLOGICAL CONDITION OF THE SNOW COVER OF ST. PETERSBURG

1. E. M. Nesterov, Ph. D. (Geology), Dr. Habil, Professor at the Herzen State Pedagogical University of Russia, This email address is being protected from spambots. You need JavaScript enabled to view it., St. Petersburg,
2. L. M. Zarina, Ph. D. (Geography), Associate Professor at the Herzen state pedagogical University of Russia, This email address is being protected from spambots. You need JavaScript enabled to view it., St. Petersburg,
3. M. A. Markova, Ph. D. (Geography), Associate Professor at the Herzen State Pedagogical University of Russia, This email address is being protected from spambots. You need JavaScript enabled to view it., St. Petersburg,
4. I.V. Gracheva, Ph. D. (Geography), Head of Environmental Monitoring Laboratory at the Chelyabinsk State University, This email address is being protected from spambots. You need JavaScript enabled to view it., Chelyabinsk,
5. A.V. Vorontsova, Ph. D. (Geography), Senior Lecturer af the St. Petersburg State University of Industrial Technologies and Design, This email address is being protected from spambots. You need JavaScript enabled to view it., St. Petersburg,
6. Yu. A. Makarova, Post-graduate Student at the Herzen state pedagogical University of Russia, This email address is being protected from spambots. You need JavaScript enabled to view it., St. Petersburg

The article presents the results of monitoring the snow cover of the St. Petersburg region for 2008—2016. The authors analyzed the relationships between the chemical composition of snow cover, total mineralization and pH value of melt water. It is shown that for intermediate control (rapid assessment) in environmental monitoring of the urban environment it is advisable to use indicators of total mineralization and pH. Their distribution in the snow cover gives a reliable picture of the level of air pollution; it allows to optimize the snow sampling network, effectively design routes for comprehensive research not only snow, but also soil and vegetation. The article also presents the results of chemical, phase and dispersion composition of the solid fraction of snow cover. The data were obtained by X-ray spectral, electron probe microanalysis and inductively coupled plasma mass spectrometry. It was found that the solid fraction of snow (dust sediment) in composition is close to loam and clay, characteristic of the sedimentary cover of the Leningrad region. It is shown that the presence of rock-forming elements (Fe, Mg, Na, Ca, K, Mn, P) in the dust sediment is mainly of natural origin, and the content of heavy metals and organic matter is mainly determined by the technogenic factor. The article identifies the main sources of pollution and assesses their impact on the ecological state of the region.

snow cover, mineralization, firm fraction, mass-spectrometry (ICP-MS).

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