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Assessment of load of small watercourses sediments with phosphorus
Pavlíková, Marcela ; Maršálek,, Blahoslav (referee) ; Hlavčová,, Kamila (referee) ; Malá, Jitka (advisor)
The issue of phosphorus in sediments of small watercourses and phosphorus forms are often out of interest, unlike phosphorus and its forms in sediments of water reservoirs. The thesis is focused on the development and evaluation of methods for the determination of total phosphorus by modifying commonly used methods and evaluation of methods for the determination of selected forms of phosphorus in small watercourses sediments. Over 1,152 analyses of sediment samples collected in four seasons and four locations and in three paralell determinations were done. The total phosphorus in the sediments was assessed by four methods, further 7 other forms of phosphorus were evaluated by one to three methods, according to different forms of phosphorus. The data file was subjected to statistical analysis. The aim of statistical analysis was to evaluate phosphorus concentrations, depending on the used method. Additional aim of statistical analysis was to observe dependencies of phosphorus concentrations on metals and identify the impact of periods and locations on the concentration of phosphorus.
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Utilization of flow-through coulometry for study of reactivity of humic acids
Pavlíková, Marcela ; Sýkorová,, Ivana (referee) ; Klučáková, Martina (advisor)
Humic acids are part of humus material abounded in nature. Humic acids are generally aromatic stuffs with sidechains and there can be linked various functional groups as carboxylic and fenolic mainly. This functional groups are able to form transitions elements ions and complexes of different stability. This property can be used in the environment, because certain polutants should be imobilized in nature. Diploma thesis studies adsorption of metal ions Cu2+, Cd2+, Zn2+ and Pb2+ on humic acids by electroanalytical method called flow – through coulometry.
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Activated sludge inhibited by pesticides
Pokluda, Michal ; Pavlíková, Marcela (referee) ; Hrich, Karel (advisor)
The bachelor's thesis focuses on researching the inhibitory effects of selected pesticide substances on activated sludge present in wastewater treatment plants. The thesis is divided into a theoretical part and a practical part. The first part provides a theoretical explanation of pesticides, their presence in water, their basic classification, and the legislation addressing the issue of pesticide substances in water. The thesis also lists and describes methods for removing pesticides from water. Furthermore, the content of the theoretical part touches upon the topic of the Modřice wastewater treatment plant, primarily describing its treatment process. The practical part of the thesis involves laboratory research on the oxygen consumption rate of microorganisms in activated sludge in the presence of pesticides toxic to these organisms. The testing methodology is based on the standard ČSN EN ISO 8192.
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Assessment of load of small watercourses sediments with phosphorus
Pavlíková, Marcela ; Maršálek,, Blahoslav (referee) ; Hlavčová,, Kamila (referee) ; Malá, Jitka (advisor)
The issue of phosphorus in sediments of small watercourses and phosphorus forms are often out of interest, unlike phosphorus and its forms in sediments of water reservoirs. The thesis is focused on the development and evaluation of methods for the determination of total phosphorus by modifying commonly used methods and evaluation of methods for the determination of selected forms of phosphorus in small watercourses sediments. Over 1,152 analyses of sediment samples collected in four seasons and four locations and in three paralell determinations were done. The total phosphorus in the sediments was assessed by four methods, further 7 other forms of phosphorus were evaluated by one to three methods, according to different forms of phosphorus. The data file was subjected to statistical analysis. The aim of statistical analysis was to evaluate phosphorus concentrations, depending on the used method. Additional aim of statistical analysis was to observe dependencies of phosphorus concentrations on metals and identify the impact of periods and locations on the concentration of phosphorus.
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Utilization of flow-through coulometry for study of reactivity of humic acids
Pavlíková, Marcela ; Sýkorová,, Ivana (referee) ; Klučáková, Martina (advisor)
Humic acids are part of humus material abounded in nature. Humic acids are generally aromatic stuffs with sidechains and there can be linked various functional groups as carboxylic and fenolic mainly. This functional groups are able to form transitions elements ions and complexes of different stability. This property can be used in the environment, because certain polutants should be imobilized in nature. Diploma thesis studies adsorption of metal ions Cu2+, Cd2+, Zn2+ and Pb2+ on humic acids by electroanalytical method called flow – through coulometry.
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