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Microelements in fractions of bottom sediments of the Amur River |
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| Authors: | G V Kharitonova S E Sirotskii N P Chizhikova N S Konovalova A S Manucharov Z Tyugai E V Utkina |
| Institution: | 1. Institute of Water and Ecological Problems, Far East Branch, Russian Academy of Sciences, ul. Kim Yu Chena 65, Khabarovsk, 680000, Russia 2. Dokuchaev Soil Science Institute, Pyzhevskii per. 7, Moscow, 119017, Russia 3. Kosygin Institute of Tectonics and Geophysics, Far East Branch, Russian Academy of Sciences, ul. Kim Yu Chena 65, Khabarovsk, 680000, Russia 4. Faculty of Soil Science, Moscow State University, Leninskie gory, Moscow, 119991, Russia |
| Abstract: | The grain size distribution and fraction composition of bottom sediments (BS) in the Amur River are studied. The total composition of sediments, their clay subfractions—water-peptizable (WPC) and aggregated (AC) clays—and residue after clay elutriation were analyzed. It has been established that contents of Fe, Mn, Zn, and Cu in the clay subfractions are 2–4 times higher than in common bottom sediments and their residue left after the extraction of clay subfractions, confirming a significant role of clay minerals in the accumulation of elements mentioned above. It is shown that diatom algae participate in the accumulation and transport of Fe, Mn, Zn, and Cu in the river water-suspended matter-bottom sediments (clay minerals) system. It has been established that high Zr concentrations in bottom sediments are related to the presence of zircon therein. |
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