National Repository of Grey Literature 20 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
Distribution of heavy metals in small urban streams
Hnaťuková, Petra ; Benešová, Libuše (advisor) ; Komínková, Dana (referee) ; Zimová, Magdalena (referee)
Conclusion Combined sewer system significantly deteriorates water and sediment quality in urban streams studied. lmportant waste water producers of several industries are localized around Průmyslová streetin the catchmentarea of Botič and in Vysočany district in the catchment area of Rokýka. Therefore, Botič is affected mainly by Cu, Ni, Pb a Zn and Rokytka by Cd, Cu, Ni a Pb through the dischargeof CSOs in caseof rain and stormwater. Metal concentrations as well as evaluated environmental risk show significant increase due to discharge of CSOs in the longitudinal profile of streams affected by, urban drainage. Changes in distribution of Cu anď Zn to easílyavailable f|actionsrr.ereobservedin sedimentsof Botíč,which receives dischargefrom 33 CSOs. For copper it u'as proportionalincreaseof oxidizable fraction, for zink proportional increaseof exchangeble/carbonatefraction.The observedmobility order of the sir trace metals studied according to mobility factor was Cď > Zn > Ni > Cu > Pb > Cr in sedimentsof Botičand Rokytka and Cd > Zn> Ni > Pb > Cu > Cr in sedimentsof Kunratický Stream. The analysis of heary metals loadings.geochemicaldistributionand other physicochemical parametershas enabled to identify specific areas of metal contamination. However, no statistically significant correlations between...
Seasonal changes of water quality in reservoirs of the Litovecko-Šarecká cascade
Stegarescu, Rodica ; Komínková, Dana (advisor) ; Benešová, Libuše (referee)
This diploma thesis deals with monitoring of water quality in the reservoirs which form the Litovicko- Šárecká cascade. It is a cascade of ponds, waterworks and retention reservoirs situated on the Litovicko-Šárecký stream and is composed of 9 major reservoirs. These reservoirs have different functions: from landscaping, retention, biological as well as recreation: fishing and swimming. Many of these reservoirs flow through human settlements, which have a negative impact on the quality of water within the whole cascade. The goal of this thesis is to monitor physical and chemical indicators of water as well as to determine the composition of phytoplankton populations, assess the state of water depending on the human activities in the basin and also to monitor how has the water quality changed in time and what are the main pollution sources. The water quality was determined from 11 samples collected with monthly intervals during March 2012 to May 2013. Samples were collected on all the reservoirs from the inflow, in the middle and at the outflow for chemical analysis and only from the middle for biological analysis. The following indicators were monitored: temperature, pH, conductivity, dissolved oxygen, indicators of neutralization capacity (ZNK8.3 a KNK4.5), hardness, CODMn, the concentration of...
Effect of potassium on stable cesium uptake by Calla palustris from aqueous solution
Petrůvová, Nicola ; Komínková, Dana (advisor) ; Petr, Petr (referee)
The aim of the thesis was to evaluate the effect of potassium on receiving of stable cesium and evaluate the appropriateness of Marsh Calla (Calla palustris) for phytoremediation. The experiment was conducted in a green-house environment where the plants were grown in an aqueous solution. The plants were exposed then to a stable isotope of cesium (133Cs) at a concentration of 1 mM CsCl. Potassium was added to the plants in the form of potassium sulphate (K2SO4), in five different concentrations (0.5 mM, 1 mM, 2 mM, 5 mM and 10 mM). Plants were exposed for 8 days. The largest average income of cesium (9,37 %) had a plant without added potassium. The root part of the plants showed a greater cesium content than the ground part. Based on the total intake of cesium from an aqueous solution, calla marsh can be estimated as a plant usable for phytoremediation.
Hydrochemical and hydrogeological assessment of spring waters in the western Lusatian Mountains and Zittau Basin
Palkovičová, Veronika ; Komínková, Dana (advisor) ; Kamil, Kamil (referee)
The bachelor thesis was conducted within the project "Springs connect landscapes and countries - environmental education and cooperation in the Liberec - Zittau region". The studied area is located along border of the Czech Republic and the Federal Republic of Germany, in the region of the former Sudetenland. The area encompasses two sea drainage basins and four geological units, resulting in a diverse landscape morpholgy with various types of groundwater. From March until December 2016, field measurements and water sampling were carried out on selected springs in the western part of the Liberec - Zittau region. Basic physical-chemical parametres (temperature, pH-value, electrical conductivity, redox-potential, dissolved oxygen and, if possible, discharge) were determinee on the field. Water samples were collected and processed in the laboratory. Concentrations of most anions (SO42-, Cl-, NO3-, PO43-, ...) were measured by Ion Chromatograph (Dionex ICS-1100). Cations (Ca2+, Na+, Mg2+, Fe3+, Al3+, K+, ...) were measured by inductively coupled plasma with optical emission or mass spectrometry (ICP-OES, ICP-MS), depending on the expected concentration. The measured data was averaged and sorted into four geological categories according to the geological map (crystalline complex, cretaceous, quaternary sediments, volcanites). Data were further evaluated using the demo version of the commercially available AquaChem hydrochemical software (Piper and Stiff diagram) as well as in the statistical program R. The average concentrations in most springs confirmed the attribution to the particular geological settings, however, some springs reveal a significant affect by agricultural activity. From the graphical representation of the concentration of selected ions in the spring water, it is also evident that the Quaternary sediments of the Zittau basin were likely formed from the surrounding crystalline.
Impact of urban drainage on heavy metal concentration in aquatic ecosystems
Darmovzalová, Marie ; Komínková, Dana (advisor) ; Hořická, Zuzana (referee)
Urban streams are influenced by number of human activities. Diploma thesis discusses the impact of urban drainage (specifically storm water drains) on toxic metal concentrations, of, in one of Prague's minor creeks - Zátišský Creek. Zátišský Creek flows from the right side to the Vltava River. The creek is 3080 m long with a natural flow 1.9 m3 /s. The creek is affected by seven storm water drains and three rain settling tanks. The creek was monitored from April 2009 to June 2010 during this period six sampling campaign was conducted. The samples were collected from seven remote sampling points, located both upstream and downstream from the storm water drains and rain settling tanks. The impact of storm water drains was assessed based on monitoring of toxic metals content in different parts of the aquatic environments, samples of water, sediment and aquatic biota (benthic organisms and attached algae) were collected and analyzed. The sediment samples and organisms were dried by lyophilisation (freeze dry), and digested in a microwave oven using a solution of nitric acid and hydrogen peroxide. Metal concentrations were determined by Atomic Absorption Spectrometry utilizing instrument Solaar S. Overall nine metals were identified: cadmium, lead, nickel, chromium, copper, zinc, aluminum, manganese...
Assessment of sediments from the Vuznice resevoir (PLA Krivoklatsko) for agricultural purposes
Cepáková, Šárka ; Benešová, Libuše (advisor) ; Komínková, Dana (referee)
The Vůznice Reservoir is located in the Protected Landscape Area Křivoklátsko. The thesis took advantage of the special possibilities to sample bottom sediment from the drained reservoir's space. The Vůznice Reservoir is discharged only exceptionally. Concentrations of heavy metals were evaluated in the sediments' samples. Given values were compared with pollution limits under current legislation of the Czech Republic for possible application of sediments on agricultural land resources. In addition, the values were compared with the U.S. EPA limits, particularly with PEC and TEC. Selected heavy metals meet the required limits of Decree No. 257/2009 Coll. placed on the sediment. Key words: toxic metals, Vuznice, bottom sediment, application of dredged sediments on land
The effect of WWTP om the water quality in the stream
Kunert, Michal ; Benešová, Libuše (advisor) ; Komínková, Dana (referee)
The aim of this work is to monitor the quality of Čermenka creek by determining the basic physical and chemical parameters and concentration of ions present in water samples and subsequent impact on the quality of the water after the construction of new waste water treatment plant. Keywords : water quality, water pollution, wastewater treatment plant
Changes of ecosystem loads in longitudinal profile of anthropogenic polluted river
Kohušová, Kateřina ; Tonika, Jaroslav (advisor) ; Cajthaml, Tomáš (referee) ; Komínková, Dana (referee)
Disertační práce Změny zátěže ekosystému v podélném profilu antropogenně ovlivněného toku Kateřina Kohušová Changes of ecosystem load in longitudinal profile of antropogenically influenced river ABSTRACT To determine anthropogenic load of the Bílina river ecosystem we monitored concentrations of selected heavy metals (As, Cd, Hg, Pb, V, Zn) and specific organic substances (PAH, PCB, HCH, HCB, DDT) in three different matrices: surface water, biofilms and sediments. In the longitudinal profile of the river, four sampling profiles were determined (B1 - B4), mapping different parts of the river. The monitoring took place from 2005 to 2008. Concentrations of the substances monitored in surface water showed a decrease in load compared to the values from ten years ago. The concentrations found in surface water showed clear tendency of pollution in the longitudinal profile; the load increased downstream and profiles B3 and B4 mid- and downstream had the highest concentration. In the case of some concentrations of substances in surface water there is a trend of the majority of values being below the detection limit by the given methods of analysis. This shows a decrease of load in the river but the positive trend was invalidated by variations in maximum concentrations. Even though these variations were rare and...

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