: 279-283
Technical University of Kosice, Slovakia, Faculty of Civil Engineering, Institute of Environmental Engineering
Technical University of Kosice, Slovakia, Faculty of Civil Engineering, Institute of Environmental Engineering

The contamination of aquatic and terrestrial ecosystems with heavy metals and other mining chemicals have been major environmental problems in many mining areas of the world. Industrial wastes, geochemical structure and metals mining form a potential source of metal contaminants in the aquatic environment especially in sediment. Monitoring sediment quality is one of the highest priorities in environmental protection policies. For better knowledge about migration, transformation behaviour and rules of heavy metals in sediment, it is necessary to make an accurate assessment of contamination level and extent at each site. The aim of this study is to assess the river sediment quality in the territory of East of Slovakia, representing the water basins of the rivers Hornad, Laborec, Torysa, Ondava and Topla. Sampling points were selected based on the current surface water quality monitoring network. Investigation was focused on heavy metals (Zn, Cu, Pb, Cd, Ni, Hg, As, Fe, Mn). The content of heavy metals reflected the scale of industrial and mining activities in a particular locality. The sediment quality was evaluated using potential ecological risk index for heavy metals
concentrations in the samples.

1. Singovszka E., Balintova M., Holub M. (2014). Assesment of heavy metals concentration in sediments by potential ecological risk index. Inzynieria Mineralna. 15(2) , 137-140. 2. Singovszka E., Balintova M., Demcak S. (2015). Heavy Metals as Environmental Risk from Bottom Sediment, In: Seminár UEI 2015, Technicka univerzita Kosice, Stavebná fakulta, 5 p. 3. Burton Jr., G.A. (2002). Sediment quality criteria in use around the world. Limnology, 3(2), 65–75. 4. Iksandar I. K., Keeney, D. R. (1974). Concentration of heavy metals in sediment cores from selected Wisconsin lakes. Environ. Sci. Technol., 8(2), 165–170. 5. Slovak Environmental Agency. “1 Introduction”. Pilot Project PiP1: Hornád/Hernád, Integrated Revitalisation of the Hornád/Hernád River Valley. TICAD. p. 5. 6. Håkanson L. (1980). An ecological risk index for aquatic pollution control: A sedimentological approach. Water Res. 14(8), 975–1001.
7. Wu Y. G., Xu Y. N., Zhang J. H., Hu, S. H. (2010). Evaluation of ecological risk and primary empirical research on heavy metals in polluted soil over Xiaoqinling gold mining region, Shaanxi, China. Transactions of Nonferrous Metals Society of China, 20(4), 688–694. 8. Zandbergen P. A. (1998). Urban watershed ecological risk assessment using GIS: a case study of the Brunette River watershed management. J. Hazard Mater. 61(1–3), 163–173. 9. Slovak Act. No. 188/2003 Coll of Laws on the application of treated sludge and bottom sediments to fields.