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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Speciation of arsenic in fluvial systems
 Jaxylykova, Anastassiya ; Drahota, Petr (advisor) ; Peřestá, Magdaléna (referee)
4 Summary This bachelor work is devoted to the distribution of the increased concentrations of arsenic in fluvial systems near the villages of Mokrsko and Smolotely in the Central Bohemian region of the Czech Republic. Arsenic in these areas is found in sulfidic minerals associated with gold- bearing mineralizations in the bedrock. Due to the toxicity of arsenic, natural weathering of the mineralized rocks represents a danger for the population of these sites. The theoretical part of the work is devoted to general concepts of the occurrence and concentrations of arsenic in different environments. In the practical part, a small separate study is presented, which studies the concentration of arsenic in fluvial sediments and stream water of the study sites. The results show that the highest arsenic concentrations in the fluvial sediments are almost the same (500- 550 mg/kg). The highest dissolved arsenic concentration was found at Mokrsko (360 g/l), while the highest aqueous arsenic at Smolotely was 160 g/l. Keywords: Arsenic, fluvial sediments, stream water, arsenic contamination
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