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The presence of pollutants in matrices of bioindicators
Vlček, Ladislav ; Vávrová, Milada (referee) ; Doležalová Weissmannová, Helena (advisor)
This master‘s thesis concerns with occurrence of heavy metals in the environment, mainly in the matrices of bioindicators. Special attention is given to occurrence of mercury in the environment and its quantification in bioindicators. Mercury and its compounds are today considered as one of the most significant contaminants in the environment. Some sorts of mushrooms cumulate sizable amounts of mercury in their fruiting body and therefore we can use them to consider loading of different areas. Eight areas in Vizovice and its surroundings were chosen for these purposes and during the years 2006 – 2008 harvested 50 samples from 19 sorts of mushrooms from there. The concentrations of Hg were determined in all samples by single-purpose absorption spectrometer AMA 254. Comparison of the mercury content between individual sorts of mushrooms in the same area as well as comparison of loading of areas was performed and also bioaccumulation ability of individual sorts of mushrooms was determined.
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Testing of antibacterial compositions based on Ag in PU and EP formulations
Seidlová, Michaela ; Doležalová Weissmannová, Helena (referee) ; Kučera, František (advisor)
Nowdays, an emphasis is plased on an antibacterial properties of various products, including floor and coating materials. This work is about an testing of effectivity of the chosen antibacterial agents in the water born and solvent free floor systems which are epoxide or polyurethane based. As first step, the most suitable representative of each floor system was chosen, the silver based agents (respectively silver anion Ag+ based) which should have an antibacterial effect when incorporated into the floor system was chosen. The selected ones are Ag/SiO2, Ag/TiO2, Ag/Al2O3, Ag/ZnO, Ag/BaO, Ag/zeolite, AgI. The necessary was a creating of the test method which has to offer exact and reproducable outputs. At the begining, the method came out from the norms ČSN EN ISO 20645 Squared textiles – Determination of antibacterial activity – Test of diffusion throught the agar plate, ČSN 79 3880 Testing of antimicrobial properties of material and product of boot industry, Antifugal and antibacterial properties. Testing by this way did not bring repriducable outputs. Only the bacterial strains Escherichia coli, Klebsiella pneumoniae and Staphylococcus aureus was used according to the norms. The method of recultivation was used for testing. The process is: an application of the coating on the bottom of the Petri´s dish, curing, appplication of the bacterial solution, cultivation for 24 hours at 37 °C, inoculation onto the agar in the Petri´s dish, cultivation for 24 hours at 37 °C, interpretation of the grow/inhibition of the bacteries. The results offer the overview about the advantages and disadvantages of each antibacterial agent in the chosen systems.
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MONITORING OF URANIUM IN DRINKING WATER IN THE SOUTH MORAVIAN REGION AND ITS ANALYSIS.
Hanusková, Vendula ; Doležalová Weissmannová, Helena (referee) ; Ing.Dita Janečková, (advisor)
The determination of uranium in samples of the enviroment was considered for liquadeted chemical toxicity of uranium and it is impossible to leave out a potential occurrence in drinking water. The purpose of this diploma thesis was the monitoring of preselected public water supplies in the South Moravia and post action analysis of those samples. That was all on the basis of the requierement of the Regional Hygiene Station. For determination of trace concentrations of uranium in drinking waters the method ICP-MS (Inductively Coupled Plasma with Mass Spectrometry) was chosen. All of the results were then summarized and evaluated. At the end are proposed feasible solutions and precautions for public water supplies operators.
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Emissions from transport - a new pollutants
Dvořák, Rostislav ; Sommer, Lumír (referee) ; Doležalová Weissmannová, Helena (advisor)
This work is focused on platinum group metals (Pt, Rh, Pd), their use in the automotive industry, risks associated with the occurrence of these substances in the environment, their potential impact on population health and, ultimately, the characteristics of these elements and some of their compounds as such.
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Contamination of soil and sediment by hazardous metals
Pidima, Tomáš ; Komendová, Renata (referee) ; Doležalová Weissmannová, Helena (advisor)
This bachelor thesis deals with soil and sediments from the environmental perspective. For selected heavy metals – cadmium, lead and mercury are given information about their occurrence, characteristics and potential sources of environmental contamination. It is also mentioned legislation dealing with the topic. The limit concentrations in soil and sediments, determination methodology and principles of the most commonly used instrumental analytical methods for these elements are described.
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Assessment of water quality from wells Highlands region
Remerová, Martina ; Vávrová, Milada (referee) ; Doležalová Weissmannová, Helena (advisor)
The bachelor’s thesis is focused on assessment of water quality from wells, which are situated in the Highlands region. The thesis deals with various types of water, whereas it deals in detail with underground water. Further there are described pollutants in water with the emphasis on elements, ions and salts in samples, which were examined in practical part. Then there is given general information about wells, a reader is acquainted with the Highlands region, there is described Velké Meziříčí closely and its surroundings. Last chapters are devoted to a geological section of the locations of wells and their characteristics. The thesis contains chapters attended to taking samples and an enumeration of used devices and chemicals. There are described methods of assessment of individual inorganic pollutants in an individual chapter. There are drawn up calibrations for elements and compounds. At the end of the thesis is concentrated on results. The results of each measurement are well-arranged and compared with standards for drinking water. In most of the cases is proved that wells from given locations are not contaminated by inorganic pollutants monitored in this thesis.
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