Выпуск: 3 , Том: 331 , Год издания: 2020

Relevance. Dissolved organic matter almost always presents in waters and plays an important role in formation of their chemical composition, while until recently it has received little attention. For the Kuznetsk Basin, the study of dissolved organic matter is very important due to the presence of coal deposits, which determines the regional specifics of the loads on water systems. The aim of the research is to study the dissolved organic matter distribution in the surface and groundwaters of the region. Methods. Chemical and organic composition of water was determined by standard methods in the Research Laboratory for Hydrogeochemistry of Tomsk Polytechnic University: dissolved organic carbon - by the method of high-Temperature catalytic oxidation, oxygen demand, chemical oxygen demand, biochemical oxygen demand - by titration methods. Fulvic acid and humic acid were determined by the titration method to account dichromate consumed for the fulvic and humic acid carbon oxidation. Results and conclusions. The paper introduces the data on dissolved organic matter indicators and fulvic acid and humic acid concentrations in river, lake and ground waters of the Kuzbass Naryksko-Ostashkinskaya area. It was shown that fulvic acids prevail, from 69 to 100 %, in all waters in composition of humic substances. The humic ones have a subordinate significance. Groundwater in zones with intensely fractured rocks is distinguished by the minimum values of all dissolved organic matter indicators (dissolved organic carbon, oxygen demand, chemical oxygen demand, biochemical oxygen demand) and relatively heterogeneous humic substances composition. River and lake waters have more homogeneous humic substances composition and narrow dissolved organic matter range values, despite differences in chemical composition and pH. For groundwater in zone of damped fracturing circulating within the coal deposits at depths of 400-1200 m, the highest dissolved organic matter indicators and relatively homogeneous fulvic and humic acid composition are characteristic. At the first stage of the research, there is no relationship between the organic matter concentration and the salinity and all the waters chemical composition, pH and depth.