DISSOLVED FORMS OF MIGRATION OF HUMIC SUBSTANCES IN SURFACE WATER BODIES OF THE YAMAL-NENETS AUTONOMOUS DISTRICT
The relevance. The river and lake waters of the Arctic regions of Western Siberia are enriched with dissolved organic matter, primarily humic acids, which are characterized by a good ability to form stable organomineral complexes. When studying the formation of the chemical composition of such water...
| Published in: | Bulletin of the Tomsk Polytechnic University Geo Assets Engineering |
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| Main Authors: | , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2022
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| Subjects: | |
| Online Access: | https://doi.org/10.18799/24131830/2022/5/3564 https://doaj.org/article/1331908df0d649c2867815c0916784e5 |
| Summary: | The relevance. The river and lake waters of the Arctic regions of Western Siberia are enriched with dissolved organic matter, primarily humic acids, which are characterized by a good ability to form stable organomineral complexes. When studying the formation of the chemical composition of such waters, it is necessary to take into account the complex compounds that shift the equilibrium in geochemical processes (in dissolution, leaching, sedimentation and co-precipitation, etc.) towards the aqueous phase, thereby directly affecting the composition of waters. In the case of humic acids, a sufficient data on thermodynamic constants have been accumulated which made it possible to conduct numerical modeling. The main aim is to consider the features of the distribution of humic substances (fulvic and humic acids) in the surface waters of the region and to calculate the migration forms based on the available new data on the chemical composition. Other issues are to study in what quantity and what elements are bound by humic substances; and whether there are differences between the waters belonging to different river basins. We also determine the role of organic matter, mainly humic substances, in the formation of the chemical composition of waters. Objects: surface water bodies of the tundra and forest-tundra natural zones of the Yamalo-Nenets Autonomous District. The authors tried to cover the main stages of the surface water evolution in the direction of depression – large lakes – rivers, as well as consider the water bodies of different drainage basins of four main rivers – Taz, Pur, Ob, Nadym. As a result, 23 watercourses (large and small rivers) and 24 reservoirs (20 lakes of different sizes and 4 depressions) were studied. Methods. Chemical composition of water was determined by standard methods at the Basic Research Laboratory of Hydrogeochemistry of the Tomsk Polytechnic University, the analysis of fulvic acids and humic acids was carried out by titration to account for bichromate consumed for the oxidation of ... |
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