10.4122/1.1000001543
Kominkova, D.
D.
Kominkova
Nabelkova, J.
J.
Nabelkova
Distribution of heavy metals in freshwater ecosystem of small stream impacted by urban drainage
DTU Library, Technical University of Denmark (DTU)
2005
Conference presentation
Benthos
distribution
heavy metals
remobilization
sediment
small urban streams
Czech Technical University In Prague, Faculty Of Civil Engineering
Faculty Of Civil Engineering
Czech Technical University In Prague
2005
en
10.4122/1.1000001544
text/xml
This paper is focused on the study of heavy metals remobilisation possibilities and changes of distribution coefficients leading to remobilization as a result of changing conditions in stream caused by urban drainage. The paper also reports consequent changes of bioaccumulation coefficient for different species of benthos community, which seems to be the best indicator of aquatic community quality in small urban streams. The paper presents results obtained during field monitoring as well as results obtained during laboratory experiment. The field monitoring identified in the study area (the Botič creek) three heavy metals (Cu, Zn, Pb), which are the main source of toxicological risk in this area. Based on the monitoring, these elements were used for laboratory experiment, where their behavior during changing conditions was studied. The experiment shows that changing conditions in stream caused by urban drainage significantly impact the fate of heavy metals in aquatic ecosystems and that these elements have different preferences to bind to particular geochemical fraction of sediment, which consequently means different bioavailability.