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Dissertations / Theses on the topic 'Oxidační procesy'

Author: Grafiati
Published: 28 June 2021
Last updated: 2 February 2022

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1

Vlach, Tomáš. "Studium degradace pesticidů pomocí pokročilých oxidačních procesů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-433114.

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In the master’s thesis are expleined and described proceses and terms related by problematic degradation of pesticides using advenced oxidation proceses and their possibilities of determinations. The essence of the experimental work was development and validate created method for determination of chosen pesticides. Degradation of this pesticides by advenced oxidation proceses and their determination after degradation. The aim of the work was compare chosen oxidation methods and summary of results for designe of the most appropriate method.
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2

Stříteský, Luboš. "Využití oxidačních procesů (AOP) pro odstraňování mikropolutantů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226161.

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This thesis deals with advanced oxidation processes (AOPs) and it’s use for removal of micropollutants from wastewater. The first chapter explains the need AOPs, water quality, pollution and substances that are present in the water. Further, the first chapter outlines approach of the current legislation to micropollutants. The second chapter explains the theory and principle of operation of AOPs. This chapter is divided into two sections. The first section describes AOPs, which were tested at selected WWTP. In the second section, there are described some other AOPs. The third chapter is a lite
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3

Procházková, Petra. "Posouzení účinnosti pokročilých oxidačních procesů prostřednictvím testů ekotoxicity." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2019. http://www.nusl.cz/ntk/nusl-401843.

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Recently, an increasing problem in wastewater treatment is the insufficient removal of organic pollutants. These substances can be toxic to the environment already in a small amount, either acutely or chronically. The goal is therefore to develop of technologies that ensure their effective removal. One possibility is to use advanced oxidation processes. Advanced oxidation processes work on the principle of non-selective oxidation mediated by OH radicals. Several methods such as O3/H2O2 (Peroxone), UV/H2O2 or Fenton´s reaction can be used to generate them. The aim of this thesis was to evaluate
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4

Moravčíková, Světlana. "Sledování účinnosti odstraňování léčiva z vody vybranými adsorbenty." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409703.

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This diploma thesis deals with the efficiency of removal of pharmaceuticals from drinking water by selected adsorption materials. The first part describes sources of pharmaceuticals in drinking water and possible ways of contaminating water by pharmaceuticals. Subsequently, the pharmaceuticals most commonly found in the environment - nonsteroidal anti-inflammatory drugs, antibiotics, psychiatric drugs and sex hormones - are described in more detail. Next, the thesis describes the processes used for removal of pharmaceuticals. These are activated carbon adsorption, membrane processes and advanc
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5

Dalajková, Nikola. "Odstranění vybraných organických polutantů z vody s využitím pokročilých oxidačních procesů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2018. http://www.nusl.cz/ntk/nusl-376792.

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The aim of this diploma thesis is the determination of selected organic pollutants with a focus on artificial sweeteners in waste water from wastewater treatment plant (WWTP) Modřice and the subsequent degradation of the thus obtained concentrations in model water using advanced oxidation processes (AOP). Two sweeteners were determined, namely sucralose and saccharin found in waste water. Synthetic sweeteners are not sufficiently cleaned in the WWTP and penetrate the environment. Effective processes for removing organic substances, including alternative sweeteners, are AOP processes. These pro
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6

Venská, Petra. "Odstranění organického znečistění z vody s využitím UV záření." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-295686.

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This diploma thesis focuses on possibilities of applications of UV radiation to remove pollutants from water. It summarizes sources of UV radiation and list their benefits and properties. The thesis characterizes so called advanced oxidation processes using UV light. Degradation pathways od pyridine and its derivatives especially halogenated pyridines are described. The photodegradability of pyridine and a rate of this reaction in model water is investigated in the experimental part. Also, the effect of concentration and dose of H2O2 is assessed. Gas chromatography was used to determinate conc
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7

Prehradná, Jana. "Úprava oxidačních vlastností TiAl intermetalik přetavováním povrchu v řízené atmosféře." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231717.

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Rešerše se zabývá teorií technologického způsobu zpracování materiálů, tzv. povrchového tavení. V první části rešerše je popsána samotná technologie a základní parametry ovlivňující proces tavení. Ve druhé části je uvedeno srování dvou základních typů laserů, a to Nd:YAG a CO2 laser. CO2 laser byl použit v případě našeho experimentu. Třetí část se zabývá vlastnostmi TiAl intermetalických slitin, především jejich fázemi -TiAl a -Ti3Al. Na závěr teoretické části je zmíněna oxidace TiAl intermetalických slitin. Experimentální část je věnována přetavování povrchu slitiny Ti-46Al-0,7Cr-0,1Si-7Nb-0,
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8

Bílková, Zuzana. "Studium degradace léčiv s využitím pokročilých oxidačních procesů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2015. http://www.nusl.cz/ntk/nusl-234378.

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At present, the issue of occurrence of female sex hormones, estrogens and progestogens, in aquatic ecosystems is often discussed by experts and the general public. These substances of steroid structure can be difficult to remove completely by conventional wastewater and drinking water treatment technologies. In given context advanced oxidation processes based on in situ generation of highly reactive hydroxyl radicals can be a suitable technique. This thesis deals with the study of kinetics and degradation products of photocatalytic decomposition of seven female sex hormones (estrone, -estradio
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9

Burton, Robert M. "Oxidant concentration effects in the hydroxylation of phenol over titanium-based zeolites Al-free Ti-Beta and TS-1." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/2366.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2006.<br>This work focuses on the effects of hydrogen peroxide concentration on the catalytic activity and product selectivity in the liquid-phase hydroxylation of phenol over titanium-substituted zeolites Al-free Ti-Beta and TS-1 in water and methanol solvents. Hydroquinone is typically the desired product, and these solvents employed have previously been shown to be of importance in controlling the selectivity of this reaction. Different volumetric quantities of an aqueous 30 wt-% peroxide solution were added to either
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10

Franz, Rudolf. "Výzkum progresivních metod snižování obsahu škodlivých látek ve výfukových plynech vznětových motorů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-418061.

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The scope of this dissertation work is a description of modern methods of reducing exhaust emission in diesel engines. The fundamental part is the application of these methods for diesel engines for off-road use that means for engines that are used in tractors and road machines. The mentioned evidence for the practical utility of the results of this dissertation thesis in practice and their verification on the actual engine are given in the conclusion.
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11

OLŠAN, Pavel. "Pokročilé oxidační procesy v environmentálních aplikacích." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-156306.

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The aim of this thesis is the study of application of the synergistic effects of various advanced oxidation processes (AOP) used for decomposition of chemical compounds resistant to biodegradation. The synergistic effect of photocatalytically active material and low temperature plasma were tested in my thesis. Model substances with photocatalytically active material were exposed to atmospheric plasma discharge (Gliding Arc) in order to improve generation of the active hydroxyl groups and oxidation processes. The first chapter of the theoretical part summarizes the knowledge of advanced oxidati
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12

ŠRAM, Vlastimil. "Funkční tenké vrstvy pro aplikace využívající pokročilé oxidační procesy." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-156307.

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This diploma thesis aims to optimalization the process of magnetron sputtering and creating of thin layers for use in advanced oxidation processes. During the work was created range of TiOx layers. For this process was used physical method of sputtering called PVD. The photocatalytic activity of the deposited films was tested by degradation of organic dyes Acid Orange 7. Furthermore, the layer was analyzed on surface morphology (SEM) and the layer thickness (profilometry). Study of created layers was focused on the link between the characteristics of each layer, deposition parameters and photo
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13

Petr, Tomáš. "Změny ve složení a lokalizaci gangliosidů u cholestázy v návaznosti na markery signalizující patologické procesy v jaterních buňkách." Doctoral thesis, 2016. http://www.nusl.cz/ntk/nusl-265171.

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This thesis is focused on the study of glycosphingolipids in the rat liver in different types of cholestasis and the effect of oxidative stress on changes in the composition and localization of gangliosides. First, it was necessary to optimize the immunochemical detection of glycosphingolipids. GM1 ganglioside was selected as a representative of a large glycolipid family. We found that minimum water content in the fixing solution was a key condition for fixation of histological sections. Optimized method of GM1 detection was subsequently used in in vivo experiments. We have demonstrated that e
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14

Su, Hsin-Wei, and 蘇信瑋. "An investigation of radical oxidant generated in thermally activated persulfate process." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/00838235574471313344.

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碩士<br>國立中興大學<br>環境工程學系所<br>96<br>In situ chemical oxidation (ISCO) is an alternative to remediate soil and groundwater. Sodium peruslfate (Na2S2O8), a strong oxidant with a redox potential of 2.01 V, is recently used for ISCO. It has been postulated that persulfate anion can be thermally activated to produce a powerful oxidant known as the sulfate radical (SO4-•), which can potentially destroy organic compounds. Under alkaline condition, the sulfate radical can proceed radical interconversion reaction with hydroxyl ions to generate the hydroxyl radical (HO•). As sulfate and hydroxyl radicals a
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15

KRAJČOVIČ, Jan. "Vytváření tenkých vrstev pro aplikace pokročilých oxidačních procesů s využitím kovových dopantů." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-170232.

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The aim of this diploma thesis is deposition of TiO2 thin films onto different types and sizes of substrates, and some of these layers dope by iron or silver. During the work was range of TiO2 layers created using a method of physical vapor deposition namely magnetron sputtering. For these processes was chosen the Dreva ARC 400 Hard Material Coating Plant device. The main aim of these depositions was to attempt to create TiO2 thin films on a substrates of larger surface than its in average laboratory processes usual. For this purpose were TiO2 layers deposited onto square glass plates of side
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16

Sherikar, Baburao Neelkantappa. "Investigations of Solution Combustion Process and their Utilization for Bioceramic Applications." Thesis, 2014. http://hdl.handle.net/2005/3015.

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Solution combustion synthesis (SCS) with its origin at IPC department of IISc has been widely practiced for synthesis of oxide materials. It is simple and low cost process, with energy and time savings that can be used to produce homogeneous, high purity, uniformly doped, nano crystalline ceramic powders. The powders characteristics such as crystallite size and surface area are primarily governed by enthalpy, flame temperature of combustion, fuel and fuel to oxidizer ratio ( F/O). In the present work an attempt has been made to investigate the process in order to exercise a control over the p
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