Features of changing pH value and conductivity of snow cover in Bratsk
Relevance of the research is defined by the necessity to obtain real information on atmosphere state and discharge precipitation area based on investigation of physical and chemical properties of Bratsk snow cover. Objective: to study the features of changing pH and conductivity considering chemical...
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| Format: | Article |
| Language: | Russian |
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Tomsk Polytechnic University
2019-05-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
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| Online Access: | http://izvestiya.tpu.ru/archive/article/view/1441 |
| Summary: | Relevance of the research is defined by the necessity to obtain real information on atmosphere state and discharge precipitation area based on investigation of physical and chemical properties of Bratsk snow cover. Objective: to study the features of changing pH and conductivity considering chemical composition of snow cover filtrate in industrial emission area. Methods: snow sampling by Hydrometeorology technique, mass spectrometry with inductively coupled plasma (ICP-MS), potentiometry, conductivity. Results: According to the results of snow chemical survey within Bratsk the author has found out changes in specific conductivity and snowpack pH caused by industrial emissions. Industrial emissions in Bratsk are caused by production of primary aluminum, ferroalloys, cellulose, as well as power engineering and transport. Snow cover pH in residential sector of Central Bratsk is in the range of 5,5-7,7, in the areas of the main industrial areas it is of 6,0-7,5. The author determined the coefficients of simple correlation between pH and conductivity, content of Rb, K, S, CS, Ga, Cr, Ca, Na, As, Cl, Pb in snow cover filtrate. Change of these values depends on motor vehicles and industrial plants emissions. The specific conductivity of snow cover in residential and industrial areas is in the range of 10-200 μS/cm, the highest values of χ 140-200 μS/cm occur near the roads. It is noted that on the top of the mountain with the height of about 476 m the highest values of electrical conductivity and concentration of fluoride, aluminum are recorded in snow water filtrate in comparison with the samples taken on the slopes. For the first time the author mapped the contours of snow filtrate conductivity near Bratsk, with an interval of 10 μS/cm. The map displays the conductivity change, the local maxima of electrical conductivity corresponding to sampling points with the highest values and dedicated to industrial sites - sources of pollution. The range of variation of snow filtrate conductivity reflects the area of industrial emissions distribution. There is a risk of atmospheric corrosion for man-made objects in these areas. |
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| ISSN: | 2500-1019 2413-1830 |