National Repository of Grey Literature 61 records found  beginprevious24 - 33nextend  jump to record: Search took 0.01 seconds. 
Variability of water quality parameters in selected reservoirs in Prague
Stará, Eva ; Ettler, Vojtěch (advisor) ; Chalupová, Dagmar (referee)
Small water reservoirs in urban areas have important landscape-forming and environmental roles. However, numerous anthropogenic activities can influence the water quality in these urban ponds. This thesis evaluates and compares the water quality in selected ponds in Prague area (Motol, Stodůlky, Háje) by means of regular water monitoring between May and November 2013. Parameters commonly used as indicators of anthropogenic load were monitored (NO3 - , NH4 + , PO4 3- , Cl- , dissolved oxygen, chemical oxygen demand) and supplemented with the investigation of other chemical and physico-chemical parameters (alkalinity, acidity, water hardness, pH, Ca2+ , NO2 - , specific conductivity). Data were evaluated using Czech technical norm (ČSN - EN 75 7221), which defines five categories of surface water quality. Our data indicated that surface water from reservoirs in Motol exhibited the best water quality (1st category), reservoirs from Stodůlky were slightly polluted and reservoirs from Háje exhibited the poorest water quality (with some parameters exhibiting values corresponding to the 4th category). We found statistically significant correlations between the alkalinity, water hardness, COD and concentrations of NO3 - , Ca2+ , Cl- and PO4 3- . Moreover, numerous parameters are dependent on cumulative...
Basic haematological parameters and their influencing by pollutants in common carp a review
POLANSKÁ, Daniela
The objective of this study was to describe the methods of determining the main haematological parameters and obtain as much information as possible about pollutants that may influence them. The subject of this thesis is the common carp (Cyprinus carpio L.). As far as pollutants are concerned, I focused on nitrogen compounds (ammonia, nitrite and cyanide), metals (Zn, Cu, Fe), heavy metals (Hg, Cd, Pb, Cr), petroleum substances, pesticides (organophosphates, triazines and diazines, pyrethroids), pharmaceuticals and natural supplements and persistent organic pollutants. Collected information imply that heavy metals and pesticides have the most important effect on haematological parameters of the common carp. Heavy metals cause changes in haematological parameters and cell anomalies and pesticides may cause haematopoietic failure, which especially means a decrease of number of red blood cells, the concentration of haemoglobin, the haematocrit value and the changes in the presence of different leukocyte forms. This study summarizes the knowledge of the effects of the aforementioned pollutants and highlights the danger of their effect as well as the possible threat to fish health, not just of the common carp. The information dealing with the effects of many pollutants on the blood parameters of fish is missing in available scientific literature.
Environmental aspects heating
Vypušťáková, Veronika ; Poláčik, Ján (referee) ; Baláš, Marek (advisor)
The topic of this bachelor´s thesis is ecological impacts of heating. The first part contains information on selected pollutants that adversely affect the environment and human health. The second part is devoted to the comparison of pollutants in boilers for solid, liquid and gaseous fuels. The last third part focuses on proposals for measures to eliminate undesirable effects of pollutants.
Analysis of very low pollutant concentrations in air and their photocatalytic oxidation
Vaněčková, Eva ; Rathouský, Jiří (advisor) ; Kavan, Ladislav (referee)
For preparation of the mesoporous thin layers of TiO2 of define structure was used a sol-gel method in combination with structure directing surface-active agents. Various properties of the layers, such as size of surface area, thickness, porosity, light absorption ability and their relationschip to photocatalytic activity during NO oxidation, were investigated. A significant influence of these properties to activity of the photocatalyst was proved.
Analysis of trace pollutants in water and their photocatalytic degradation
Štěpánková, Sandra ; Rathouský, Jiří (advisor) ; Nesměrák, Karel (referee)
Mesoporous TiO2 films with variable thickness were prepared by dip-coating. Two kinds of sols were used, sol 1 and sol 2, which were separately tested and compared. The activity of samples of these sols was tested employing photocatalytic degradation of 1.10-4 mol.dm-3 4-chlorphenol. The efficiency of the degradation of 4-chlorphenol was increasing proportionately with each additional layer. The optimum turned out to be three layers.
Air quality in sports buildings
Fabian, Peter ; Horák,, Petr (referee) ; Rubinová, Olga (advisor)
The work deals with indoor air quality and ventilation control based on indoor air quality. Based on the analysis of the concentration of CO2, heat and moisture gains can suggest the optimal way to reduce excessive ventilation
The Compliance of Legal Environmental Standards in South Bohemia
JOZÍFKOVÁ, Alena
The aim of the diploma thesis is to assess the compliance of environmental standards in South Bohemia, as well as to evaluate the changes concerning environmental polluters and the condition of South Bohemian environment in last 10 years. The first section is focused on the theoretical attitudes towards environment. General environmental instruments and their practical use in Czech legislation are discussed together with the comparison of the environmental development before and after joining the European Union. Furthermore this section deals with the topic of national and international institutions engaged in the environmental protection. The practical section defines the administrative area of South Bohemia and subsequently analyses the environmental condition in given period of time. Thereafter, the development of the most significant polluters in last 10 years is established with the comparison method. Based on the studies applied, the thesis proposes the way to improve the environmental condition in South Bohemia, discusses the results and follows with the evaluation of the environmental compliance in the examined area.
Adsorption of Phenol from Aqueous Solution on Various Sorbents
Matějková, Martina
This study is focused on an evaluation of an individual sorbent efficiency and capacity concerning phenol removal from waste and/or industrial water by sorption techniques.
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Photocatalytic Processes for Degradation of Endocrine Disruptors from Wastewater
Spáčilová, Lucie ; Maléterová, Ywetta ; Krejčíková, Simona ; Cajthaml, Tomáš ; Šolcová, Olga
The efficiency of the titania oxide thin layers on the glass beads for degradation of 17- ethynylestradiol and bisphenol A in water solution was studied in the batch disposal and consequently in the continual micro-photo reactor. Experiments were performed regarding to the efficiency of the process and evaluation in the term of toxicity of reaction products.
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Plný tet: SKMBT_C22012102414082 - Download fulltextPDF
Příspěvek ČR ke zjištění stavu ozonové vrstvy Země a slunečního UV záření v Antarktidě‚ paleoklimatická a paleogeografická rekonstrukce vybraného území Antarktidy a související geologické studium a mapování
Český hydrometeorologický ústav, Praha ; Česká geologická služba, Praha ; Mixa, Petr
Projekt je rozdělena čtyři dílčí témata. A: Geologické a geomorfologické výzkumy spojené s rekonstrukcí vývoje krajiny zahrnuje dílčí úkoly A-1: geologické mapování ostrova James Ross jako základ geo-vědního poznání vývoje krajiny, A-2: paleoklimatologickou a paleogeografickou rekonstrukci holocenního vývoje zalednění oblastí a globálních změn na hranici křída/terciér, A-3 rekonstrukce nejstarších geologických procesů vzniku oblasti. Téma B: Klimatologické výzkumy - sledování ozonu a UV záření zahrnuje dílčí úkoly B-1: Využití měření spektrální intenzity UV záření pro operativní hodnocení pole UV-Indexu v oblasti Anarktidy, k validaci satelitních měření UV a UV modelů, B-2: Využití měření celkového ozonu a vertikálního Umkehr profilu ozonu pro operativní hodnocení stavu ozonové vrstvy a k validaci satelitních měření ozonu, B-3: Zavedení pravidelných měření celkového ozonu a spektrálního UV-záření na ostrově James Ross (česká výzkumná stanice v Antarktidě) a on-line přenos naměřených dat k zpracování SOO v Hradci Králové. Téma C: Příspěvek k ekologii antarktické avifauny - populační dynamika a hnízdní biologie avifauny ostrova James Ross, Indikace ochrany místních populací avifauny a tuleňů. Téma D: Environmentální výzkumy - polutanty v půdách, sněhu a ledu v oblasti ostrova James Ross a jejich chování. Moderně pojaté výzkumy podstatným způsobem příspívají k poznání vývoje klimatu, dokládají antropogenní znečištění antarktického kontinentu a jsou důležitým příspěvkem ke klimatickým glaciologickým pozorováním. V rámci všech témat jsou podrobně popsány dosažené výsledky a průběh projektu.

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