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Anthropogenic pollutioin of the Elbe River sediments
Haismanová, Pavla ; Chalupová, Dagmar (advisor) ; Bernsteinová, Jana (referee)
The thesis focuses on contamination of sediments in fluvial lakes of the Elbe river. The research was conducted in Kluk Lake near Poděbrady which has been artificially isolated from the river and its connection to the Elbe is now limited. The thesis concentrates on chemical composition of old sediments in vertical profile which documents an old anthropogenic pollution of Elbe's floodplain. The individual layers of sediment were analyzed separately. Besides grain size, the research also determined concentration of heavy metals and arsenic (Ag, Cd, Co, Cr, Cu, Hg, Mn, Ni, Pb and Zn). The sediment samples taken near the river contained higher content of elements compared to the more distant sampling site. This finding points out to the various distribution of elements and different settling velocity in the lake. Application of the geoaccumulation index showed that the sediments were very strongly polluted by silver and moderately to strongly polluted by arsenic, cadmium, mercury, lead and zinc. Last, the sediments were unpolluted to moderately polluted by cobalt, chromium, copper, manganese and nickel. According to the methodology of the International Commission for the Protection of the Elbe River (MKOL), the concentrations of silver, mercury, nickel and lead exceeded the upper limit value. Finally,...
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