FORMATION OF THE CHEMICAL COMPOSITION OF WATER OBJECTS OF SOUTHERN MINUSINSK DEPRESSION IN THE CONDITIONS OF ATMOSPHERIC POLLUTION
As a result of long-term researches of geosystems of Southern Minusinsk Depression in the territory of which the aluminum production plants on pollution of snow cover work the area of distribution the dust and gas issues which makes 200–250 sq.km is established and the main elements pollutants are revealed (F-, Na+, Al3+, Ni2+). In the conditions of a background and within the specified territory the chemical composition of an atmospheric precipitation (a rain, snow) is studied, waters of a superficial and intra soil drain, the rivers, lakes and underground waters and the comparative analysis of the received results which has shown increase in contents in an atmospheric precipitation of a zone of pollution of F-by 89–493 times, Al3 + in 39–469, to Na + at 2–22 is carried out. As a part of rain and snow water primary position was reached by F-(22–63 % eq.), Al3 + (17–54), Na + (27–31). Their chemical composition from chloride-hydrocarbonate sodium-calcium was replaced in a zone of subsidence of a dust and gas stream with sulfate-fluoride aluminium-sodium. At interaction with the soil the structure of rainfall is transformed again, turning into surface and intra soil solutions in which participation of pollutant decreases owing to partial absorption by soils of F-and full Al3+. On the contraryexit in solutions of other ingredients, such as HCO3-and Ca2 + has increased. The increased quantity of F-is revealed in underground hidrokarbonate-sodium waters of the top level (to 10 m) only near the plant. Enrichment by fluorine of lakes is caused mainly by natural factors. Steadily low level of his contents (on average 0,09 mg/dm3) remains in the Yenisei River which is in 5 km to the south from a source of issues and deep waters of economic and drinking appointment (on average 0,30 mg/dm3). Therefore, to the greatest influence, the water component of an initial link of formation of the hydrosphere of local level has undergone. Speed of water migration of pollutant is carried out in the sequence of Na +> F-> Al3 +> Ni2+.