Mercury and methylmercury content in chub from the Svitava and Svratka Rivers at agglomeration Brno
2009
Kruzikova, K.,Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Verejneho Veterinarniho Lekarstvi a Toxikologie | Blahova, J.,Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Verejneho Veterinarniho Lekarstvi a Toxikologie | Kensova, R.,Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Verejneho Veterinarniho Lekarstvi a Toxikologie | Jurcikova, J.,Zdravotni Ustav, Ostrava (Czech Republic) | Hypr, D.,Cesky Hydrometeorologicky Ustav, Brno (Czech Republic) | Svobodova, Z.,Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Verejneho Veterinarniho Lekarstvi a Toxikologie
The aim of our study was to determine the total mercury and methylmercury contents in the muscle of Leuciscus cephalus, to determine the total Hg contents in the sediment, and to evaluate the health risks associated with fish contamination. Chub were caught in seven localities on the Svratka and Svitava Rivers in the Brno agglomeration (Czech Republic) in 2007. The total Hg content was determined by atomic absorption spectrophotometry using an AMA 245 analyser. Methylmercury levels were determined by gas chromatography (using electron-capture detector) after acid digestion and extraction with toluene. The highest levels of total Hg and methylmercury contamination in the fish muscle (0.18+/-0.09 mg/kg and 0.16+/-0.09 mg/kg, respectively) were found at the Rajhradice site (the Svratka River, under the Brno city), whereas the lowest concentrations (0.08+/-0.02 mg/kg and 0.04+/-0.03 mg/kg, resp.) were detected at the Modrice site (the Svratka River). The total Hg level in the sediment ranged from 0.06 mg/kg to 1.38 mg/kg, the higher value having been detected in the sediment from the Svratka River at the Rajhradice site above the confluence with the Svitava River. The lowest concentration was discovered at Kninicky (the Svatka River). The hazard indices calculated for the selected localities showed no health risk to the consumer.
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