SNOW COVER ANALYSIS OF ARKHANGELSK ROADSIDE TERRITORIES
The major air pollutants in the city of Arkhangelsk in winter are the heating enterprises and moto transport. As a result of their activity the atmosphere is saturated by aggressive gases, suspended particles and heavy metals, and their content is not defined in the HydroMet network. Therefore, the information on pollutants in an urban environment is incomplete. The goal of the research is to obtain the additional information on the composition of suspended particles and snow in the city of Arkhangelsk along the main traffic arteries of the Solombalskiy, Oktyabrskiy, Lomonosovskiy districts and the district of Varavino - Faktoriya in 2013. The values of physicochemical characteristics of the snow cover are as follows: electric conductivity, pH and the content of the suspended particles. The content of potassium, sodium, magnesium and calcium is determined by the method of liquid chromatography with the use of an HPLC system LC-20 “Prominence”. The content of heavy metals (iron, manganese, copper, lead, cadmium, cobalt, chromium) is determined by the atomic and emission spectrometer ICPE-9000. The soluble forms content of heavy metals in melt water does not exceed the maximum permissible concentration (mg / dm <sup>3</sup>). The geochemical distribution series of soluble forms of alkali and heavy metals in the roadside snow cover in the city of Arkhangelsk is designed. It can be represented as follows: Na>Ca>Mg>K>>Fe≈Mn>Cu>Pb>Ni>Co>Cr>Cd. The study of the elemental composition of solid particles was performed by a raster electron microscope “Sigma VP” (Carl Zeiss), equipped by a system of energy-dispersion analysis “INCA Energy” (OXFORD). The alkali and alkaline-earth metals, iron and titanium are revealed in the structure of the solid particles. Nonmetals are presented by carbon, silicon and sulfur.