October 2015, № 10 (185)

Solovyh G.N., Vinokurovа N.V., Gоlinskaya L.V. THE ROLE OF MACROPHYTES IN THE SELF-CLEANING PROCESS OF THE URAL RIVER WATERCOURSES FROM POLYCHLORINATED BIPHENYLSThe macrophytes serve as a storage of polychlorinated biphenyls (PCBs) entering aquatic ecosystems. There were no identified clear correlations between the concentrations of the studied pollutants in water, sediments and macrophytes, but showed interspecific differences in the accumulation of PCBs in macrophytes. The analysis of the absorption coefficient of PCBs from macrophytes revealed clear differences in the accumulation processes of these pollutants in different species. Found that the most active drives toxicants Ceratophyllium demersum (Kb — 2 967.74), Lemna minor (Kb — 2 933.33), Hydrocharis morsus-ranae (Kb — 1 225.81). Group-specific hubs PCBs can be considered rooting macrophytes, which can act as the main object for diagnostic monitoring of the current ecological status of the Ural River. Probably the removal of this vegetation from the water environment can be used to activate the processes of self-purification and reducing the secondary pollution of PCBs. There is shown that during the growing season is a redistribution of entering the body of water between the components of the ecosystem polychlorinated biphenyls: their content is reduced in water and bottom sediments in autumn, but increases in macrophytes, which contributes to the temporary removal of PCBs from ecotopia, i.e. the migration of PCBs are carried out in the ecosystem of the pond through the chain of "water — macrophytes — bottom sediments". Identification of this fact to identify practical recommendations: to reduce water pollution PCBs should be carried out mowing (removal) of the macrophyte ponds that will prevent the return of contaminants in the ecosystem in the process of withering away. Key words: polychlorinated biphenyls, macrophytes, accumulation.

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About this article

Authors: Golinskaya L.V., Vinokurova N.V., Solovyh G.N.

Year: 2015

Editor-in-chief

Sergey Aleksandrovich
MIROSHNIKOV

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