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Influence of polymers to reduce dust
Šubrt, Michal ; Mravcová, Ludmila (referee) ; Vávrová, Milada (advisor)
The main issue this bachelor thesis deals with the reduction of emit into the enviroment. A specific type of polymer compound from Canadian provenance will be tested for this purpose. The aim of this work will be the identification of positive characteristics of the polymer, and determine to the appropriate method of application. The above mentioned reduction of dust, stabilization of areas after application, possibly reduction of its permeability and increase of its maximum dry density will also by measured.
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Use of the Energy Harvesting Method
Dobrovolná, Terezie ; Králík, Martin (referee) ; Sekora, Jiří (advisor)
The bachelor thesis deals with the use of Energy Harvesting. It contains suggestions for obtaining electric power from alternative sources located inside the laminar box such as light, heat or vibration. Electricity is also used to power sensors and measure solid particles in the air. If a certain particle concentration is exceeded, the acoustic sensor alerts. The work also focuses on the compilation of a block diagram of the device, experimental construction and verification of the functionality of the entire system.
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Ionic fields of various kinds and method of measurement.
Gubani, Ondřej ; Vaněk, Jiří (referee) ; Vognar, Jiří (advisor)
In the air there are positively and negatively charged ions with different mobility and size. The therapeutic effect of negative ions with high mobility is known. High concentration of negative ions occurs in speleotherapic caves. This bachelor thesis introduces the methods of measuring the concentration and mobility of various kinds of ions and their evaluation by spectral characteristics. It verifies the current mirror effect on the ions´ concentration in space. It also examines the effect of different types of ions in living organisms and an appropriate area treatment for the occurrence of negative ions.
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The concentration of particulate matter in the air of selected areas of the city of Brno and its health risks
Bulejko, Pavel ; Čáslavský,, Josef (referee) ; Adamec, Vladimír (advisor)
Tato práce se zabývá znečištěním ovzduší pevnými prachovými částicemi v lokalitách města Brna. V teoretické části je pojednáno o možných zdrojích prachových částic, o chemickém složení a velikostní klasifikaci polétavých částic a dalších fyzikálně-chemických charakteristikách. Další část je věnována zdravotním rizikům prašnosti. V této souvislosti práce pojednává o anatomii dýchacího systému a účincích prachu na něj. Jsou taktéž rozebrány zdravotní efekty prachového znečištění, včetně uvedení možných nemocí respiračního a kardiovaskulárního systému, jejichž může být prach příčinou. V praktické části byl proveden sběr prachu. Byly vybrány celkem čtyři lokality, kde byly prováděny odběry vzorků. Následně byly stanoveny koncentrace polétavých částic PM10 a PM2,5. Dále byly u vybraných lokalit stanoveny koncentrace těžkých kovů a polyaromatických uhlovodíků vázaných na prachových částicích. V závěru bylo provedeno srovnání s legislativou a stanovena zdravotní rizika.
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Application of diffusion denuder for determination of biogenic volatile organic compounds in air
Handlířová, Gabriela ; Komendová, Renata (referee) ; Křůmal,, Kamil (advisor)
The optimization of conditions for the sampling of biogenic volatile organic compounds (BVOCs) in the air using a diffusion denuder with subsequent analysis of collected samples by gas chromatography coupled with mass spectrometry (GC-MS) was the main topic of the master thesis. Collecting samples into an absorption liquid at a two-minute interval is the main advantage of the denuder. Selecting appropriate conditions for the highest collection efficiencies of individual BVOCs in denuder and for using the method for sampling in ambient air with various meteorological events was the main aim of all experiments. The following optimal conditions were selected: denuder temperature (20 °C), airflow (500 ml/min), absorption liquid (n-heptane), absorption liquid flow (0,45 ml/min). The measured collection efficiencies of all studied BVOCs in denuder were above 89 % with these optimized conditions, except for highly volatile BVOCs. The detection limits of the studied BVOCs for this method are lower than their concentration in the outdoor air during the growing season. Therefore, the optimized method is suitable for the determination of fast changes in BVOCs concentrations (except highly volatile) in the outdoor air.
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Fine particles and air-cleaning
Knebl, Viktor ; Pospíšil, Jiří (referee) ; Poláčik, Ján (advisor)
The air, water or soil pollution is one of the major problem facing our society. Whether it is the production of large amount of greenhouse gases or contamination of soil and water by various types of chemicals. This bachelor thesis focuses on fine particles, which are mainly responsible for air pollution. The aim of this work is to create an overview of formation and distribution of these particles, to point out the impact of these particles on human organism and, last but not least, to show possibilities how to reduce the production of these particles or how to clean air from them.
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Influence of traffic volume and meteorological conditions on the air pollution
Vojtěchová, Ivana ; Kotlík, Josef (referee) ; Adamec,, Vladimír (advisor)
Transport, whose intensity year by year increase, has assuredly influence on air quality. This issue solution will be focused especially on localities burden with transport in urban areas. The contribution of transport to increased values of air pollution will be evaluated with regards to meteorological conditions. Background stations from Czech Hydrometeorological Institute categorization will be chosen such as comparative sites. Pollutants emitted from traffic such as particulate matter, nitrogen oxides and carbon monoxide will be observed except meteorological conditions.
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Mikroplasty a jejich vliv na životní prostředí
Kopicová, Jana
This bachelor thesis deals with plastic pollution in the environment predominantly focusing on microplastics. The aim of the theoretical part is to acquaint readers with the terminological background of plastics and their microscopic parts. This part also contains an overview of current information about sources, presence, and possible impact of microplastics in the environment centring on the water component. The theoretical part further discusses the effect of microplastics on living organisms and one’s health. In the practical part of the thesis, a questionnaire survey was carried out to find out respondents’ opinions and awareness of the given matter. The results of the survey confirmed that most of the respondents, despite being familiar with the term microplastics, are not well informed about their impact on the environment. The survey also indicates that this area lacks public awareness. Furthermore, a comparative analysis shows that more than 80% of the respondents would be in favour of refundable plastic bottles. Finally, the survey appears to confirm that respondents have poorer knowledge in legal regulations dealing with plastic waste.
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