naa a22 4500 510749720 CHVBK 20180411083100.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s11270-013-1688-9 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1688-9 The Differentiation between Point and Diffuse Industrial Pollution of the Floodplain of the Ploučnice River, Czech Republic [Elektronische Daten] [L. Majerová, T. Matys Grygar, J. Elznicová, L. Strnad] Pollution by heavy metals (Co, Cu, Ni, Pb, Sb and Zn), 226Ra and U was studied in eight profiles (1.0-1.8m deep) in the floodplain sediments of the Ploučnice River, the Czech Republic. The element concentrations were processed by establishing local geochemical background functions from non-polluted overbank fines yet not affected by reductimorphic processes and a subsequent calculation of enrichment factors in the polluted strata. In the case of Cu and Ni, the geogenic variability of the watershed (Cretaceous marine sediments and Cenozoic volcanics and their weathering products) was successfully handled using different background functions in two parts of the studied area, which allowed us to decipher the anthropogenic and natural portions of the heavy metals and hence evaluate the history of pollution. The upper course of the river drains an extensive area of so-called chemical mining (underground acid leaching of low-grade U-bearing sediments) and hydrometallurgical processing in Stráž pod Ralskem that started in the late 1960s and operated without waste-processing plants up to 1989. The river system has consequently been impacted by U and gamma-emitting 226Ra and obviously also by divalent heavy metals (Co, Ni, Zn). In the entire study area, that pollution was preceded by increasing levels of Cu, Pb and Sb and by the 206Pb/207Pb ratio decreasing from 1.20 towards 1.17, which had started earlier in the twentieth century before the U mining. That pre-mining pollution can be attributed to diffuse anthropogenic activities of regional or continental importance. The most recent 206Pb/207Pb ratio in the Ploučnice alluvium coincides with that of peatbog profiles on the borders of the Czech Republic, showing the usefulness of floodplains as pollution archives of widespread regional to continental pollution signals. Springer Science+Business Media Dordrecht, 2013 Sedimentary archive nationallicence Floodplain sediment nationallicence Overbank fines nationallicence Point pollution nationallicence Diffuse pollution nationallicence Majerová L. Faculty of Environment, J. E. Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic aut Matys Grygar T. Faculty of Environment, J. E. Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic aut Elznicová J. Faculty of Environment, J. E. Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic aut Strnad L. Faculty of Science, Charles University, Prague, Czech Republic aut Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-20 0049-6979 224:9<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1688-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1688-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Majerová L. Faculty of Environment, J. E. Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic aut NATIONALLICENCE 700 1- Matys Grygar T. Faculty of Environment, J. E. Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic aut NATIONALLICENCE 700 1- Elznicová J. Faculty of Environment, J. E. Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic aut NATIONALLICENCE 700 1- Strnad L. Faculty of Science, Charles University, Prague, Czech Republic aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-20 0049-6979 224:9<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer