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Mercury contents in mushrooms growing nearby a factory producing ammunition and an industrial shooting-range
BRÁZDOVÁ, Lenka
Contents of mercury were determined using AAS method (instrument AMA-254) in 119 fruiting body samples of 41 mostly edible mushroom species. The mushrooms were collected from a forest near by the ammunition factory and its industrial shooting-range (fy Sellier & Bellot, Vlašim, Czech Republic). The highest mercury accumulation was observed in samples of Agaricus arvensis, Lepista nuda, Calocybe gambosa and Russu-la nigricans. Mercury content was highly comparable with concentrations observed in unpolluted sites.
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Occurrence of mercury in the soil.
MACHOVÁ, Zdeňka
ABSRTACT Mercury occur in atmosphere, in water also in soil. Work deal with compile literary background research about occurrence mercury in soils and decontamination contaminated soils. Decontamination they may proceed by the help of electrokinetics method, pyrometallurgical processes, biochemical processes and by the help of plants. Work is supplemented about experimental partthat the was compile - time on experimental localities. Main experimental locality finds not far off municipality Velký Chuchelec on Českokrumlovsko. Two next locations find near municipality Břehov on Českobudejovicko and municipality Lužice not far off Netolice on Prachaticko. Locality near Velký Chuchelec is in a number of ways managed meadow. In locality Břehov was take away exhibits arable land and in locality Lusatia was exhibits take away from arable soil, meadowland and wood. Total content mercury in soil was given by the help of atomic absorbtion spectrometry(AAS). Record was compared among single parts locations Velký Chuchelec that the was variously managed. Was processed by the help of statistical methods ANOVA and for content general mercury was quantified correlation with lysimeter waters and with oxidable carbon and organic carbonr. Further was compared contents total mercury among localities mutually and among variants wood, arable land and meadow. Was ascertained that the on experimental locality near Velký Chuchelec was included at least total mercury on flat 1, plot managed skiving three times per annum and amended NPK fertilizers, average content do 0,0265 {$\mu$}g/g. On the contrary high value in those locality was on plot managed mulching in combination with skiving also on flat 1, average value was 0,1171 {$\mu$}g/g. In comparison of others localities was documentary downtrend near kind soil. Differences content mercury in soil among forest soil, meadow and arable soil was conclusive. Downward trend was in sequence: forest soil F+H > meadowland > forest soil A1+A2 > arable land, with next average values in mentioned sequence: 0,1896 {$\mu$}g/g > 0,0924 {$\mu$}g/g > 0,0517{$\mu$}g/g > 0,0401 {$\mu$}g/g.
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The Content of Mercury and Lead in Sediments from Vltava River and Lipno Reservoir.
MAŘÍKOVÁ, Helena
The aim of this thesis was to define and evaluate the load of sediments by exposure of mercury and lead on the upper flow of the Vltava river and in the Lipno lake. To evaluate possible influence of the glass factory in Lenora for pollution of this area by toxic metals mentioned above. The literature survey refers about problems of mercury and lead content in fresh water and reservoirs sediments, the structure of toxic heavy metals and risks of their release in the enviroment, then in chemical composition of water reservoirs. It also engages in glass manufacturing problems in the glass factory in Lenora, especially the raw materials, which where obviously used for its manufacture. Experimental part describes profile of sampling points, working methods, used chemicals and results of individual analyses. Sediments of the Lipno reservoir and the upper flow of the Vltava river aren{\crq}t seriously loaded with mercury or lead, but in the sediments below Lenora was shown multiple increase of lead and mercury content in comparison with the background. Forest soils has higher mercury content in all localities in comparison with the sediments. On the contrary, the content of EDTA-extractable lead in soils is lower. Detected isotopic ratio of lead 206/207 and 208/206 in sediments of the Vltava river below the glass factory in Lenora have different signature in comparison with the signature of sediments from the Vltava river above the glass factory. On the contrary the signature of lead in all sediments of the Lipno reservoir showed values relevant to natural background of this locality. The structure which corresponds to the lead from the glass factory was also surprisingly detected in humic horizont of the forest soils in Lenora{\crq}s surroundings. The thesis was extended with fish samples from Lipno reservoir and their liver{\crq}s load by lead and mercury content. There were determined isotop ratio (signature) of lead in the fish, the izotop ratio of lead not corresponds to the lead signature from the glass factory in Lenora.
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Mercury and its compounds in environment
PRÉDA, Luboš
The bachelor{\crq}s dissertation on the topic ``Mercury and its Compounds in Environment{\crqq} discusses the current state of contamination of environment with metallic mercury and its inorganic and organic compounds, natural and anthropogenic sources of emissions of mercury in atmosphere, in soil and in aquatic ecosystems, physical and chemical properties of mercury and its compounds, use of mercury, its toxicity and also the risk of intoxication. Contamination of environment with mercury and its compounds is a serious ecological-social problem that affects directly the whole human population and in spite of this fact, the public is not informed adequately of it. The aim of the bachelor{\crq}s dissertation is to give a comprehensive outline of risks resulting from contamination of environment with mercury and its compounds not only in the field of prevention and safety of work in the scope of operation of the Police of the Czech republic, but also for the general public that would be interested in familiarizing with such issues and also to test knowledge of the population of impacts of contamination with mercury and its components. Collection of information about the extent of contamination of environment with mercury in the town of Tábor and its surroundings is another goal.
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Mercury contents in mushrooms growing nearby Horní Slavkov.
BAŽILOVÁ, Štěpánka
Contents of mercury were determined using AAS method (instrument AMA-254) in 130 fruiting body samples of 13 edible mushroom species. The mushrooms were collected from a forest of a historical area of tin mining. The highest mercury accumulation was observed in samples of Boletus edulis and Calocybe gambosa. Mercury content was highly comparable with concentrations observed in unpolluted sites.
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The mercury load in fishes inhabiting the upper section of the Divoká Orlice and Tichá Orlice rivers
Korunová, Vlasta ; Lusková, Věra ; Lusk, Stanislav
In the boundary section of Divoká Orlice R. the mercury content in the tissues of brown trout did not exceed 0.2 mg.kg-1. WHO risk limit, 1.6 µ mercury per 1 kg human body weight per week, is attained by a person weighing 75 kg and consuming 0.63 kg trout muscular tissue a week. In Divoká Orlice drainage area, the mercury content was determined in roach (Rutilus rutilus) in 1987-1995. In a majority of specimens analysed, the values of mercury contents in their muscular tissue exceeded 0.2 mg.kg-1 (max. 0.683 mg.kg-1). In the upper part of Tichá Orlice R., increased mercury contents were found in brown trout. Below the Králíky profile, the mercury contents varied around 0.50 mg.kg-1 in the muscular tissue, and up to 0.85 mg.kg-1. The mercury loads in the fishes decreased gradually in the downstream direction down to the value around 0.20 mg.kg-1. In the uppermost part of Tichá Orlice R. below the town of Králíky, the risk limit is only 0.24 kg trout meat consumed per week.
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Mercury speciation in forest soils
Hojdová, Maria ; Rohovec, Jan ; Navrátil, Tomáš
We compared distribution of Hg in soil profiles with different level of Hg content in forest floor humus. Detailed study of soil profiles revealed that at the locality with lower Hg content in humus was higher Hg content in mineral horizons in comparison to locality with higher content in organic horizons. Most of the Hg in forest soils was bound to organic matter.
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Mercury content and speciation in contaminated soils
Hojdová, Maria ; Rohovec, Jan ; Navrátil, Tomáš
The study deals with the determination of Hg distribution and speciation in soils with different level of contamination in the CR. The highest concentrations of Hg were found in topsoil horizons and declined with increasing depth and decreasing content of humus. Thermodesorption analysis distinguished Hg2+ weakly bound to clay minerals from Hg bound to organic matter or sulfides.
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