Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(3), 217-224 | DOI: 10.11118/actaun201260030217

Trace metal contamination of the Dyje River stretch between Znojmo and Nové Mlýny, Czech Republic

Tomáš Vítek1, Josef Hedbávný2, Jan Mareš1, Petr Spurný1
1 Ústav zoologie, rybářství, hydrobiologie a včelařství, Mendelova univerzita v Brně, Zemědělská 1, 613 00, Brno, Česká republika
2 Ústav chemie a biochemie, Mendelova univerzita v Brně, Zemědělská 1, 613 00, Brno, Česká republika

The analyses of seven trace metals (Hg, Zn, Ni, Cr, Cu, Pb, Cd) in the water, bottom sediments, macroinvertebrates and fish tissues were conducted at two localities on the Dyje River, Czech Republic, at different distances downstream from the Znojmo Reservoir (at 12 and 31 km) to evaluate a contamination level. The maximum admissible limits were exceeded in Hg in the water and in the case of Ni in bottom sediments at both localities and also in Hg in zoobenthos sample at locality further from the reservoir. In regard to trace metal contamination of fish tissues, it was found that safe limits for mercury, cadmium and lead were not exceeded. Mercury and cadmium contents have declined markedly since the 1990s, but the amount of lead has increased. Human consumption of fish caught in the Dyje River is most limited by concentration of Hg in the fish muscle. The maximum tolerated intake was set as high as 3.80 kg per week.

Keywords: water quality, sediments, mercury, cadmium, lead, chub (Squalius cephalus), fish consumption
Grants and funding:

This study was supported by Research Plan No. MSM6215648905 "Biological and technological aspects of the sustainability of controlled ecosystems and their adaptability to climate change", which is financed by the Ministry of Education, Youth and Sports of the Czech Republic.

Received: March 12, 2012; Published: August 28, 2013  Show citation

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Vítek, T., Hedbávný, J., Mareš, J., & Spurný, P. (2012). Trace metal contamination of the Dyje River stretch between Znojmo and Nové Mlýny, Czech Republic. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 60(3), 217-224. doi: 10.11118/actaun201260030217
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