Content and forms of copper and zink migration in natural waters of Vasyugan Swamp

The paper presents a summary of results of the authors' own research and stock materials of TPU and ''Tomskgeomonitoring'' company on chemical composition and micro-components of natural waters of Western Siberia. The average level of heavy metals in natural waters of the Vasyugan Swamp, located in the taiga zone of Western Siberia, was determined. Special attention is paid to the forms of migration of zinc and copper in the swamp waters. In the process of studying the forms of zinc and copper we have estimated the percentage of suspended, colloidal and truly dissolved forms of these metals in the water. For the separation of the amount of suspended and colloidal forms from the dissolved ones, immediately upon the delivery of the samples to the laboratory we conducted filtering tests (without preservative) with the help of a membrane filter with pore diameter of 0.45 micron under the pressure of inert gas. The parts of particles with a size less than 0.45 that passed through the membrane filter attributed to the truly dissolved form. The total deviation method for determining the gross content and forms of migration of Cu and Zn did not exceed 40%. It is shown that in the mean annual cut on the background of increasing concentrations of Fe, Zn, Mn with increasing water disposal, the organic component and the proportion of fulvic acid could experience different trends in the concentrations of heavy metals in the waters of wetlands and watercourses. The same mechanism, presumably, has an impact on the migration of metals in the aquatic environment. We found that the migration of zinc in surface water in 55% is of colloidal and suspended forms, in 45% - in dissolved. For copper reverse distribution of dissolved and colloid-balanced forms (54 and 46%, respectively) is typical. In the dissolved form a large part of zinc is in the form of zinc ions Zn +, ZnFK and copper - in the form CuFK - and CuFK. It should be noted that in the context of the average ratio of the proportion of soluble forms of river and swamp waters may actually be quite different. It is shown that the statistics of violations of the maximum permissible concentrations for water objects of fishery limits set for dissolved forms of Cu and Zn, is excessive by 1.7 and 2.4 times respectively.

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