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Inkjet prints ageing by ozone and light
Pasečná, Klára ; Jančovičová, Viera (referee) ; Veselý, Michal (advisor)
This thesis is focused on the effect of ozone on ink-jet prints. The knowledge about print technologies, materials for ink-jet printing, influence of environmental factors on the prints degradation and the methods of print lifetime estimation are discussed in the theoretical part of the thesis. Test-charts of 108 samples of C, M, Y primary colours and their overprints were prepared. I used two types of papers designed for ink-jet printing. These samples were exposed the effect of ozone in various concentrations to perform an accelerated aging experiment. Optical density values, La*b* coordinates, colour difference values were calculated from the measured spectral data. Changes of colours of the ink due to ozone exposure were determined and discussed. The validity of the reciprocal law due to ozone exposure was studied, too. The reciprocal behaviour was not confirmed for both types of the studied papers.
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Separation of pollutants on photoreactors
Kurťák, Marek ; Šolcová, Olga (referee) ; Svěrák, Tomáš (advisor)
The diploma thesis deals with photocatalytic degradation of organic polutants on water- suspended UV activated anatase particles. The measurements are executed on a pilot plant UV photoreactor and the aim the thesis is to figure out the time course of azo dyes degradation under different photoreactor settings and subsequently infer the effectivity of the photoreactor under different settings. The degree of the aze dyes degradation is evaluated via UV-VIS spectrometry.
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Production of Unmeasured Emissions by Combustion in House Boilers
Chlubna, Martin ; Lisá, Hana (referee) ; Lisý, Martin (advisor)
This bachelor thesis deals with the production of non-monitored pollutants during combustion in domestic boilers. The theoretical part is made up of a research study dealing with pollutants and their legislation. In the experimental part combustion tests for coal and wood of different moisture are made. In conclusion, the measurement results are evaluated on the basis of chemical analysis.
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Pollutants in laboratory waste waters
Červenka, Jiří ; Zmrzlý, Martin (referee) ; Sponar, Jan (advisor)
Mercury is a very consequential pollutant. It´s contained in all components of environment. Analysis of mercury is very demanding. Since mercury is ranked among dangerous chemicals, its quantity is limited and checked not only in environment. The aim of this thesis was to determine concentration of mercury in water from labs and in influent and effluent water from neutralization station of Brno university of Technology, Faculty of Chemistry. Water from neutralization is also mixed with sewage. Advanced mercury spectrometer AMA 254 was used or analysis. Results confirmed, that water flows out from lab to neutralization with relatively high concentration of mercury, highly exceeding limits of drainline. Water from neutralizing station also doesn´t show so high concentration of mercury, because it is mixed with waters from other labs and pH of water is amended. Special waste bottles for liquid waste with risk elements and dangerous compounds are available; from results can be decided, that not everybody follows the rules and some people might pour the waste right in to the sink. Resolution could have been safer acquisitions in labs. Students, who manipulate with dangerous chemicals should be alive to risk, which threatens with pouring into the sink, contamination and dangerous for all components of environment.
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Measurements results assessment and emission limits
Čech, Martin ; Jedlička, Filip (referee) ; Dvořák, Radek (advisor)
Main content of this task is summary and explanation of main methods,which can be used to evaluation the results from measuring of pollutants in combustion gases. The way which should be most acceptable for our datas will be consequently used in a simply example. There will be mentioned the importace of chosing the entering datas and their dependence on outer conditions. Another chapter will be devoted to emission standarts of main pollutants in Czech republic and in chosen world countries too. There will be mentioned the historical developement of these standarts and hypothesis to the future about this question too.
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Fastness of Photographs Exposed to Light and Pollutants
Pasečná, Klára ; Havlínová, Bohuslava (referee) ; Veselý, Michal (advisor)
The bachelor thesis deals with a study of general influences of light and pollutants (mainly ozone) on ink printing. The theoretical part describes the basic principles of printing means, printing materials and some ways of ink print degradation. The experimental part focused on measuring specific coulometric quantities of a test pattern, which was done in the chamber for ozone development and the accelerated weathering device using light and heat (xenotest). An important finding from this study is that the influence of ozone on tested pigment ink is much smaller than the one of UV radiation. The most susceptible to degradation by radiation and ozone was yellow ink.
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Separation efficiency of water pollutants on pilot plant photoreactor
Melicher, Daniel ; Mirko,, Dohnal, (referee) ; Svěrák, Tomáš (advisor)
The thesis deals with photocatalysis of organic pollutants on UV-activated anatase particles, on UV-activated anatase particles with hydrogen peroxide and hydrogen peroxide itself. The measurement is carried out on a pilot plant UV photoreactor. The aim of the thesis is to determine the effectiveness of azo dyes and antibiotics degradation. The level of azo dyes and antibiotics degradation is measured by UV-VIS spectrometry.
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Vyhodnocení monitoringu podzemních vod ovlivněných rozvodnami elektrické energie
BLAHOVEC, Milan
The subject of the diploma thesis is the solution of the problem of old environmental burdens. The work consists of two parts, and it the theoretical (literary review) and the practical part. In the literature review, I describe the concepts and essentials comprehensively related to this issue (risk analysis, management, legislation, etc.). In the practical part is described the old environmental burden in the locality Dasný (energy distribution plant).
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Characterization of microorganisms with biodegradation potential for sulfonamides
Sedláček, Jan ; Palyzová, Andrea (advisor) ; Mikušová, Gabriela (referee)
Sulfonamides are antibiotics that are frequently used both in human and veterinary medicine. The combinations of abundant use of these antibiotics and their natural resistance to decay leads often to long term persistence in the environment. This accumulation, especially in living organisms, may lead to subsequent toxicosis. Also, presence of these antibiotic in nature poses problems with regard to the spread of genes for antibiotic resistance between potential pathogens. These facts led to an increase interest in studying the sulfonamide biodegradation and subsequent sulfonamide removal from the environment. In this work it was possible to isolate and characterize the microorganism Acinetobacter sp. strain 49. This microorganism was able to biodegrade under right conditions sulfamethoxazole with 80 % efficiency. Sulfamethoxazole is one of the most commonly found sulfonamide in the nature.
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Separation efficiency of water pollutants on pilot plant photoreactor
Melicher, Daniel ; Mirko,, Dohnal, (referee) ; Svěrák, Tomáš (advisor)
The thesis deals with photocatalysis of organic pollutants on UV-activated anatase particles, on UV-activated anatase particles with hydrogen peroxide and hydrogen peroxide itself. The measurement is carried out on a pilot plant UV photoreactor. The aim of the thesis is to determine the effectiveness of azo dyes and antibiotics degradation. The level of azo dyes and antibiotics degradation is measured by UV-VIS spectrometry.
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