Assessment of mercury contamination in the Bilina River (Czech Republic) using indicator fish
2012
Kruzikova, K., Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Verejneho Veterinarniho Lekarstvi a Toxikologie | Svobodova, Z., Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Verejneho Veterinarniho Lekarstvi a Toxikologie
The aim of this study was to determine Hg concentration in the muscle of indicator fish and to assess Hg pollution along the Bilina River (Czech Republic) which is one of the most important tributaries of the Elbe River. Eight sites were chosen for sampling. Leuciscus cephalus, Rutilus rutilus and Salmo trutta m. fario in the total numbers of 24, 26 and 27, respectively, were sampled at four locations, since at the remaining sites fish were absent. Hg concentrations in the muscle of sampled indicator fish were measured using cold vapour atomic absorption spectrometry on an AMA 254 analyser. The highest Hg conc. (0.12+/-0.027 mg/kg) was found in the muscle of roach at the Usti nad Labem site and the lowest one (0.04+/-0.008 mg/kg) in the muscle of brown trout from the Brezenec (the first upstream site) site. A significant difference between the analyzed fish species was found only between chub (0.08 mg/kg) and brown trout (0.04 mg/kg) at the Brezenec site. Despite the fact that the Bilina is an extensively polluted river, the obtained Hg levels were very low and did not exceed the limit of 0.5 mg/kg set by the Commission Regulation No. 1881/2006.
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