Section: Chemistry of natural environments and objects
The Ob River is a multifunctional water body used for fishery purposes, shipping, irrigation, recreation and drinking water supply. The research on the river water quality related to the assessment of ecological state and studying the regularities of chemical composition dynamics is topical nowadays. The paper presents the results of investigation of the hydrochemical composition (major ions: Ca2+, Mg2+, Na+, K+, SO42–, Cl–,F–
, nutrients: N, P, Si and trace elements: Li, Be, B, Al, Ti, V, Cr, Co, Ni, Cu, Zn, As, Sr, Mo, Cd, Ba, Pb, Fe, Mn) of the Ob River water near the city of Barnaul. The study was performed by Chemical-Analytical Center, Institute for Water and Environmental Problems of Siberian Branch RAS. The content of ions PO43–, Si, and COD (chemical oxygen consumption) was determined using a DR-2800 Hach Lange spectrophotometer, while the mineral composition, NH4+, NO2–, NO3– ions – with a Dionex ICS-3000 ion chromatograph. The concentration of trace elements was measured by inductively coupled plasma mass spectrometry (ICP MS) on an ICAP-Qc spectrometer. The dynamics of elements content in the Ob water was determined in different
hydrological seasons of 2018. The river water is enriched by major ions and nutrients due to increased runoff of more mineralized groundwater in winter. Based on the factor analysis, we revealed three main groups of components, which differ in content and spatial distribution within the Ob surface water. In addition, we made the assessment of water pollution and revealed the excess of MAC for fishing waters in organic matter content (COD), Al, Ti, Cu, Fe and Mn.
Keywords: the Ob River, surface water, hydrochemical characteristics, biogenic elements, trace elements
Article published in number 3 for 2022 DOI: 10.25750/1995-4301-2022-3-096-102
ISSN 1995-4301
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